CN104383784B - The system and method for separation and Extraction inert gas from environmental gas - Google Patents

Abstract

The disclosure relates to a system for separating and extracting inert gas from ambient gas, and the system includes: a moisture removal device; a low temperature fractionation device; a titanium sponge chemical adsorption device; a gas chromatography separation device; an inert gas collection device; and a vacuum device. The present disclosure also relates to a method for separating and extracting inert gas from ambient gas, the method comprising: a moisture removal step; a low-temperature fractionation step; a titanium sponge chemical adsorption step; a gas chromatography separation step; and an inert gas collection step. The present disclosure also relates to the use of the above system and method for simultaneous separation and extraction of krypton gas at the microliter level and argon gas at the hundred milliliter level.

Description

System and method for separating and extracting noble gases from ambient gases

technical field

The present disclosure relates to the technical field of gas sample separation and inert gas extraction, in particular to a system and method for efficiently separating and extracting a trace amount of inert gas from a small amount of ambient gas.

Background technique

The system and method for efficiently separating and extracting inert gases from a small amount of ambient gases (such as air, groundwater, and dissolved gases in ice cores, etc.) (Argon and Krypton) technology. The argon and krypton samples extracted by this method can be used for isotope and trace analysis of environmental samples and other applications, such as radioactive isotope ³⁹ Ar and ⁸¹ Kr, ⁸⁵ Kr dating, etc. Specifically: for ambient gas samples (the main components of which are nitrogen, oxygen, methane, etc.), water and carbon dioxide are first removed, and then argon and krypton are separated by low-temperature fractionation, and then chemical sponge titanium is used at high temperature. Adsorption, remove most of nitrogen, oxygen, methane, etc., realize the successive enrichment of argon and krypton, and finally use chromatography to separate the enriched krypton, and finally realize the efficient extraction of argon and krypton .

Since the volume fractions of krypton and argon in ambient gas samples are generally several parts per million and 1% respectively, it is necessary to efficiently separate and extract two kinds of gas with four orders of magnitude difference in volume content from one ambient gas sample at the same time. Noble gases are very difficult, especially when the total sample volume is hundreds of milliliters to tens of liters. At present, it is mainly a single separation and extraction of krypton or argon in the world at present. The commonly used method is: for krypton, generally use pure low-temperature compression fractionation to enrich krypton, and then use gas chromatography to separate krypton ([1]Yokochi, R.; Heraty, LJ; Sturchio, NC: Method for Purification of Krypton from Environmental Samples for Analysis of Radiokrypton Isotopes. Analytical Chemistry 80 (2008), No. 22, 8688-8693). The biggest disadvantage of this method is that in the stage of pure low-temperature compression fractionation, the loss of krypton gas is relatively large, so that the separation efficiency of krypton gas is not high. For argon, a large-dose gas chromatographic separation method is generally used to directly chromatographically separate the gas sample to obtain argon ([2] Riedmann, RA: Separation of Argon from atmospheric air and Measurements of ³⁷ Argon for CTBT purposes, University of Bern, Dissertation, 2011). Although this method is straightforward, it has extremely high requirements for chromatographic column packing and temperature control, and the separation efficiency and product purity are not ideal.

The above two methods can only realize the separation of a single krypton or argon gas, the process is relatively complicated, and the efficiency is not high, which greatly limits the application.

Contents of the invention

In some embodiments of the present disclosure, it relates to a system for separating and extracting inert gas from ambient gas, the system comprising:

A moisture removal device for removing moisture and carbon dioxide in an ambient gas sample;

A cryogenic fractionation device for loading an ambient gas sample from the moisture removal device and performing cryogenic fractionation on the ambient gas sample to produce a fractionated gas containing a majority of argon and a fraction containing a small amount of argon and a large amount of argon Part of the fractionated residual gas of krypton;

Sponge titanium chemical adsorption device, the sponge titanium chemical adsorption device is used for chemical adsorption at high temperature, successively removes nitrogen, oxygen and methane in the fractionation gas and fractionation residual gas generated by the low temperature fractionation device, and retains argon and krypton , successively obtain argon and krypton-rich gas containing a small amount of argon and most of krypton;

A gas chromatographic separation device, the gas chromatographic separation device uses a helium carrier gas to carry out chromatographic separation of the krypton-rich gas obtained after chemical adsorption by the sponge titanium chemical adsorption device;

An inert gas collection device, the inert gas collection device is used to collect inert gas, and the argon gas obtained by the adsorption fractionation gas obtained by the sponge titanium chemical adsorption device is combined with the argon gas obtained by the gas chromatography separation device; and, The krypton gas separated by the gas chromatographic separation device is also sent to the inert gas collection device for collection; and

A vacuum device for generating the vacuum conditions required for the entire system.

In some embodiments of the present disclosure, the cryogenic fractionation unit includes:

Activated carbon gas storage tube, the activated carbon gas storage tube is equipped with activated carbon, used for physical adsorption of the ambient gas sample sent from the moisture removal device at the temperature of liquid nitrogen; and/or

A gas mass flowmeter, the gas mass flowmeter is used to control the speed at which fractionation gas and fractionation residual gas enter the sponge titanium chemical adsorption device during the cryogenic fractionation process, and record the gas volume entering the sponge titanium chemical adsorption device respectively.

In some embodiments of the present disclosure, the titanium sponge chemical adsorption device comprises:

Titanium sponge, the titanium sponge is used for chemical adsorption at high temperature, and successively removes nitrogen, oxygen, and methane in the fractionation gas and fractionation residual gas fed into the low-temperature fractionation device; and/or

A high temperature reaction tube used as a container for the reaction between the titanium sponge and the gas; and/or

A pressure gauge, the pressure gauge is used to monitor the air pressure in the sponge titanium adsorption device, to judge the process of chemical adsorption between the sponge titanium and the fractionation gas, between the sponge titanium and the fractionation residual gas, and judge the completion of the chemical adsorption time.

In some embodiments of the present disclosure, the noble gas collection device includes:

An argon gas collection tube, the argon gas collection tube is equipped with activated carbon, and is used to collect the argon gas obtained by the chemical adsorption fractionation gas of the sponge titanium chemical adsorption device and the argon gas separated by the gas chromatographic separation device at the temperature of liquid nitrogen gas for storage; and/or

A krypton gas collection tube, the krypton gas collection tube is equipped with activated carbon, and is used to collect the krypton gas separated by the gas chromatography separation device at the temperature of liquid nitrogen for storage.

In some embodiments of the present disclosure, the ambient gas is selected from the group consisting of air, geothermal gas, dissolved gas in groundwater, dissolved gas in surface water, dissolved gas in ocean water, and dissolved gas in ice cores.

In some embodiments of the present disclosure, it relates to a method of separating and extracting an inert gas from an ambient gas, the method comprising:

a moisture removal step, wherein moisture and carbon dioxide are removed from the ambient gas sample with a moisture removal device;

A low-temperature fractionation step, wherein an activated carbon gas storage tube is used to physically adsorb the ambient gas sample sent in from the moisture removal device at the temperature of liquid nitrogen, and the ambient gas sample is subjected to low-temperature fractionation to produce a fractionated gas containing most of argon and a small amount of argon. Fractionated residual gases of argon and most of krypton;

Sponge titanium chemisorption step, wherein under the monitoring of pressure gauge, use sponge titanium to carry out high-temperature chemisorption in the high-temperature reaction tube, remove the nitrogen, oxygen and methane in the fractionation gas and fractionation residual gas produced by the low-temperature fractionation device, and retain Argon and krypton, successively obtain argon and krypton-rich gas containing a small amount of argon and most of krypton;

Gas chromatography separation step, wherein the krypton-rich gas obtained after chemical adsorption by the sponge titanium chemical adsorption device is loaded with a sampling loop, the krypton-rich gas in the sampling loop is purged by a helium carrier gas into the chromatographic column, and the krypton-rich gas in the krypton-rich gas is Argon, nitrogen and krypton are separated by a chromatographic column, and then purged by helium carrier gas into the inert gas collection device for collection;

The inert gas collection step, in which the argon gas obtained by the sponge titanium high-temperature chemical adsorption fractionation gas is combined with the argon gas separated by gas chromatography, and sent together into the argon collection tube for collection, and the krypton gas obtained by gas chromatography is sent into Krypton collected in the collection tube.

In some embodiments of the present disclosure, in the low-temperature fractionation step, the activated carbon contained in the activated carbon gas storage pipe in the low-temperature fractionation device is used to physically adsorb the environment sent by the moisture removal device at the temperature of liquid nitrogen gas samples; and/or

In the titanium sponge chemical adsorption step, use the gas mass flowmeter in the low temperature fractionation device to control the speed at which the fractionation gas and fractionation residual gas enter the titanium sponge chemical adsorption device during the low temperature fractionation process, and record the speed of entering the titanium sponge chemical adsorption device respectively. The gas volume of the sponge titanium chemisorption device; and/or

In the sponge titanium chemical adsorption step, the titanium sponge in the titanium sponge chemical adsorption device is used for chemical adsorption at high temperature, and nitrogen and oxygen in the fractionation gas and fractionation residual gas sent by the low temperature fractionation device are successively removed , methane; and/or

In the titanium sponge chemical adsorption step, the high-temperature reaction tube in the titanium sponge chemical adsorption device is used as a container for the reaction between the titanium sponge and the gas.

In some embodiments of the present disclosure, argon and krypton whose volume fractions differ by four orders of magnitude are effectively separated and separately enriched.

In some embodiments of the present disclosure, the ambient gas is selected from the group consisting of air, geothermal gas, dissolved gas in groundwater, dissolved gas in surface water, dissolved gas in ocean water, and dissolved gas in ice cores.

In some embodiments of the present disclosure, it relates to the use of the system or method in the present disclosure for the simultaneous separation and extraction of krypton gas at the microliter level and argon gas at the hundred milliliter level.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only These are some embodiments described in the present disclosure. Those skilled in the art can also obtain other drawings based on these drawings without creative work.

Fig. 1 is a schematic structural diagram of a system for efficiently separating and extracting inert gas from a small amount of ambient gas (such as air, groundwater, and dissolved gas in ice cores) disclosed in an embodiment of the present disclosure;

detailed description

In view of this, some specific embodiments of the present disclosure relate to a system and method for efficiently separating and extracting inert gas from a small amount of ambient gas (such as air, groundwater, and dissolved gas in ice cores, etc.), so as to improve the efficiency of separation and extraction. The technical solution is as follows:

Some specific embodiments of the present disclosure relate to a system for efficiently separating and extracting inert gas from a small amount of ambient gas (such as air, groundwater, and dissolved gas in ice cores, etc.), including: a vacuum device, a moisture removal device, a cryogenic fractionation device, and a sponge Titanium chemical adsorption device, gas chromatographic separation device, inert gas collection device, among which:

The moisture removal device is used to remove moisture and carbon dioxide in the ambient gas sample (the main components of which are nitrogen, oxygen, methane, etc.), and then the ambient gas sample is sent to the low-temperature fractionation device;

The low-temperature fractionation device is used to load ambient gas samples, and perform low-temperature fractionation on the ambient gas samples to generate fractionated gas (including mainly argon) and fractionated residual gas (including a small amount of argon and mainly krypton), so as to realize the Separation of argon and krypton;

The titanium sponge chemical adsorption device is used for chemical adsorption at high temperature, and successively removes nitrogen, oxygen, methane, etc. in the fractionated gas and fractionated residual gas generated by the low temperature fractionation device, and the argon and krypton are retained, and successively obtained Argon and krypton-rich gas (including a small amount of argon and mainly krypton), to achieve the enrichment of argon and krypton;

The gas chromatographic separation device includes a chromatographic column, a sampling loop and a helium carrier gas, the sampling loop is loaded with the krypton-rich gas obtained after chemical adsorption by the sponge titanium chemical adsorption device, and the helium carrier gas purging injection The krypton-rich gas in the ring enters the chromatographic column, and the argon, nitrogen and krypton in the krypton-rich gas are separated by the chromatographic column, and then purged by the helium carrier gas into the inert gas collection device for collection, thereby Realize the separation of krypton gas;

The inert gas collection device is used to collect inert gas, the argon gas obtained by the sponge titanium chemical adsorption device absorbing fractionation gas is combined with the argon gas obtained by the gas chromatography separation device, and sent together to the inert gas collection device for collection, Final storage; Similarly, the krypton gas separated by the gas chromatographic separation device is also sent to the inert gas collection device for collection;

The vacuum device includes a stainless steel vacuum pipeline, a vacuum valve, a vacuum seal and a vacuum pump system for generating the vacuum conditions required for the experiment.

In some specific embodiments of the present disclosure, the cryogenic fractionation device also includes:

Activated carbon gas storage tube;

The activated carbon gas storage tube is equipped with activated carbon, which is used for physical adsorption of the ambient gas sample sent by the water removal device at the temperature of liquid nitrogen.

In some specific embodiments of the present disclosure, the cryogenic fractionation device also includes:

Gas mass flow meter;

The gas mass flowmeter is used to control the speed at which the fractionated gas and fractionated residual gas enter the sponge titanium chemical adsorption device during the low temperature fractionation process, and record the gas volume entering the sponge titanium chemical adsorption device respectively.

In some specific embodiments of the present disclosure, the titanium sponge chemical adsorption device includes:

Titanium sponge;

The titanium sponge is used for chemical adsorption at high temperature, and successively removes nitrogen, oxygen, methane, etc. in the fractionation gas and fractionation residual gas sent by the low-temperature fractionation device.

In some specific embodiments of the present disclosure, the titanium sponge chemical adsorption device further includes:

High temperature reaction tube;

The high-temperature reaction tube is used as a container for the reaction between the titanium sponge and the gas.

In some specific embodiments of the present disclosure, the titanium sponge chemical adsorption device further includes:

pressure gauge;

The pressure gauge is used to monitor the air pressure in the sponge titanium adsorption device, to judge the process of chemical adsorption between the sponge titanium and the fractionated gas, between the sponge titanium and the fractionated residual gas, and to judge the completion time of the chemical adsorption .

In some specific embodiments of the present disclosure, the inert gas collection device includes:

Argon collection tube;

The argon gas collection tube is equipped with activated carbon, which is used to collect the argon gas obtained by the chemical adsorption fractionation gas of the sponge titanium chemical adsorption device and the argon gas separated by the gas chromatographic separation device at the temperature of liquid nitrogen, and finally store .

In some specific embodiments of the present disclosure, the inert gas collection device further includes:

Krypton collection tube;

The krypton gas collection tube is equipped with activated carbon, which is used to collect the krypton gas separated by the gas chromatographic separation device at the temperature of liquid nitrogen, and finally store it.

In some specific embodiments of the present disclosure, it also relates to a method for efficiently separating and extracting inert gas from a small amount of ambient gas (such as air, groundwater, and dissolved gas in ice cores, etc.), including:

Moisture removal, the moisture removal device removes moisture and carbon dioxide in the ambient gas sample (its main components are nitrogen, oxygen, methane, etc.), and then the ambient gas sample is sent to the low-temperature fractionation device;

Low-temperature fractionation, the activated carbon gas storage tube physically adsorbs the ambient gas sample sent by the moisture removal device at liquid nitrogen temperature, and performs low-temperature fractionation on the ambient gas sample to generate fractionated gas (including mainly argon) and fractionated residual gas (containing a small amount of argon) The argon and the main krypton), realize the separation of argon and krypton;

Sponge titanium chemisorption, under the monitoring of the pressure gauge, the sponge titanium carries out high temperature chemisorption in the high temperature reaction tube to remove nitrogen, oxygen, methane, etc., argon and Krypton is retained, and argon and krypton-enriched gas (including a small amount of argon and mainly krypton) are obtained successively to realize the enrichment of argon and krypton;

Gas chromatographic separation, the sample loop is loaded with the krypton-rich gas obtained after chemical adsorption by the sponge titanium chemical adsorption device, the helium carrier gas purges the krypton-rich gas in the sample loop into the chromatographic column, and the argon, Components such as nitrogen and krypton are separated by a chromatographic column, and then purged by helium carrier gas into the inert gas collection device for collection, thereby realizing the separation of krypton;

Inert gas collection, the argon gas obtained by sponge titanium high-temperature chemical adsorption fractionation gas is combined with the argon gas separated by gas chromatography, and sent together into the argon collection tube for collection and final storage; the krypton gas obtained by gas chromatography separation is sent to Krypton gas is collected in the collection tube and finally stored.

In some specific embodiments of the present disclosure, it also includes:

The activated carbon gas storage pipe in the low temperature fractionation device is equipped with activated carbon, which is used for physical adsorption of the ambient gas sample sent by the water removal device at the temperature of liquid nitrogen.

In some specific embodiments of the present disclosure, it also includes:

The gas mass flowmeter in the low temperature fractionation device is used to control the speed at which fractionation gas and fractionation residual gas enter the sponge titanium chemical adsorption device during the low temperature fractionation process, and record the gas volume entering the sponge titanium chemical adsorption device respectively .

In some specific embodiments of the present disclosure, it also includes:

The titanium sponge in the titanium sponge chemical adsorption device is used for chemical adsorption at high temperature, and successively removes nitrogen, oxygen, methane, etc. in the fractionation gas and fractionation residual gas fed into the low temperature fractionation device.

In some specific embodiments of the present disclosure, it also includes:

The high-temperature reaction tube in the titanium sponge chemical adsorption device is used as a container for the reaction between titanium sponge and gas.

In order to make the above objects, features and advantages of the present disclosure more comprehensible, the present disclosure will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

Example

Please refer to Fig. 1. Fig. 1 discloses a system for efficiently separating and extracting inert gas from a small amount of ambient gas (such as air, groundwater and dissolved gas in ice cores, etc.) according to an embodiment of the present disclosure, including: moisture removal device 102, cryogenic fractionation Device 110, titanium sponge chemical adsorption device 120, gas chromatography separation device 103, inert gas collection device 130 and vacuum device 101, wherein:

The vacuum device 101 evacuates the whole device, and the ambient gas sample (its main components are nitrogen, oxygen, methane, etc.) is passed into the moisture removal device 102 to remove moisture and carbon dioxide therein.

At the temperature of liquid nitrogen, the ambient gas sample is sent into the activated carbon gas storage pipe 1101 in the cryogenic fractionation device 110, and under the control of the gas mass flowmeter 1102, the fractionated gas and fractionated residual gas in the activated carbon gas storage pipe 1101 are successively passed into the In the titanium sponge chemical adsorption device 120, the separation of argon and krypton is realized.

The titanium sponge 1201 in the titanium sponge chemical adsorption device 120, under the monitoring of the pressure gauge 1203, performs high-temperature chemical adsorption in the high-temperature reaction tube 1202, and the argon and krypton are retained, and successively obtain argon and krypton-rich gas (including A small amount of argon and mainly krypton), to achieve the enrichment of argon and krypton.

The krypton-rich gas produced by the high-temperature adsorption of sponge titanium 1201 is sent to the gas chromatography separation device 103 to realize the separation of krypton gas.

Combine the argon gas obtained by the high-temperature adsorption of sponge titanium 1201 and the argon gas separated by the gas chromatography separation device 103, and send them together to the argon gas collection tube 1301 of the inert gas collection device 130 for collection and final storage; the gas chromatography separation device 103 separates The obtained krypton gas is sent to the krypton gas collection pipe 1302 of the inert gas collection device 130 for collection, and finally stored.

After many experiments, the inventor concluded that the separation efficiency of a system for efficiently separating and extracting inert gas from a small amount of ambient gas (such as air, groundwater, and dissolved gas in ice cores, etc.) disclosed in the embodiment of the present disclosure is very high, and can be simply Quickly and efficiently separate and extract microliters of krypton and hundred milliliters of argon from a small amount of ambient gas at the same time, which has great application value and prospects.

Claims (10)

1. the system of separation and Extraction inert gas from environmental gas, described system comprises:

Except moisture device, described except moisture device is for removing moisture in environmental gas sample and carbon dioxide;

Low-temperature fractionation device, described low-temperature fractionation device is for loading from the described environmental gas sample except moisture device, and low-temperature fractionation is carried out to described environmental gas sample, produce the fractionation residual gas comprising the fractionation gas of most of argon gas and generation and comprise a small amount of argon gas and most of Krypton;

Titanium sponge chemisorption apparatus, described titanium sponge chemisorption apparatus carries out chemisorbed under being used for high temperature, first remove nitrogen, oxygen and the methane in the fractionation gas of described low-temperature fractionation device generation, nitrogen, oxygen and methane in rear removing fractionation residual gas, retain argon gas and Krypton, first obtain argon gas, after obtain the rich krypton-85 gas comprising a small amount of argon gas and most of Krypton;

Gas-chromatography separator, described gas-chromatography separator adopts helium carrier gas to carry out chromatographic isolation to the rich krypton-85 gas obtained after described titanium sponge chemisorption apparatus chemisorbed;

Inert gas gathering-device, described inert gas gathering-device is for collecting inert gas, and the argon gas that the argon gas obtain described titanium sponge chemisorption apparatus adsorptive fractionation gas and described gas-chromatography separator obtain merges, and collects together; Further, described gas-chromatography separator is separated the Krypton obtained and is also admitted to inert gas gathering-device and collects; With

Vacuum plant, described vacuum plant is for generation of the vacuum condition needed for whole system.

2. the system of separation and Extraction inert gas from environmental gas according to claim 1, wherein said low-temperature fractionation device comprises:

Active carbon cylinder, described active carbon cylinder is equipped with active carbon, for physical absorption under liquid nitrogen temperature from the described environmental gas sample sent into except moisture device; And/or

Mass-flow gas meter, described mass-flow gas meter enters the speed of described titanium sponge chemisorption apparatus for controlling fractionation gas and fractionation residual gas in low-temperature fractionation process, and record enters the gas flow of described titanium sponge chemisorption apparatus respectively.

3. the system of separation and Extraction inert gas from environmental gas according to claim 1, wherein said titanium sponge chemisorption apparatus comprises:

Titanium sponge, described titanium sponge carries out chemisorbed under being used for high temperature, first removes nitrogen, oxygen, methane in the fractionation gas of described low-temperature fractionation device feeding, nitrogen, oxygen, methane in rear removing fractionation residual gas; And/or

Pyroreaction pipe, the effective container doing to react between described titanium sponge and gas of described pyroreaction; And/or

Pressure gauge, described pressure gauge, for monitoring the air pressure in titanium sponge chemisorption apparatus, to judge the process of chemisorbed between described titanium sponge and fractionation gas, between described titanium sponge and fractionation residual gas, judges the deadline of chemisorbed.

4. the system of separation and Extraction inert gas from environmental gas according to claim 1, wherein said inert gas gathering-device comprises:

Argon gas collecting pipe, described argon gas collecting pipe is equipped with active carbon, for collecting the argon gas that obtains through described titanium sponge chemisorption apparatus chemisorbed fractionation gas under liquid nitrogen temperature and being separated the argon gas that obtains through described gas-chromatography separator to store; And/or

Krypton collecting pipe, described Krypton collecting pipe is equipped with active carbon, is separated the Krypton that obtains to store for collecting under liquid nitrogen temperature through described gas-chromatography separator.

5. the system of separation and Extraction inert gas from environmental gas described in any one in claim 1-4, wherein said environmental gas is selected from solution gas in air, geothermal gas, Groundwater solution, surface water solution gas, ocean water solution gas and ice core.

6. the method for separation and Extraction inert gas from environmental gas, described method comprises:

Dewater step by step, wherein with the moisture removed except moisture device in environmental gas sample and carbon dioxide;

Low-temperature fractionation step, wherein with active carbon cylinder under liquid nitrogen temperature physical absorption by the described environmental gas sample sent into except moisture device, and low-temperature fractionation is carried out to environmental gas sample, produce the fractionation gas comprising most of argon gas, and produce the fractionation residual gas comprising a small amount of argon gas and most of Krypton;

Titanium sponge chemisorption step, wherein under manometric supervision, in pyroreaction pipe, high temeperature chemistry absorption is carried out with titanium sponge, first remove nitrogen, oxygen, the methane in the fractionation gas of low-temperature fractionation device generation, nitrogen, oxygen, methane in rear removing fractionation residual gas, retain argon gas and Krypton, first obtain argon gas, after obtain the rich krypton-85 gas comprising a small amount of argon gas and most of Krypton;

Gas-chromatography separating step, the rich krypton-85 gas obtained after titanium sponge chemisorption apparatus chemisorbed is wherein loaded with injection annulus, the rich krypton-85 gas that helium carrier gas purges in injection annulus enters chromatographic column, argon gas in rich krypton-85 gas, nitrogen are separated through chromatographic column with Krypton, then are purged successively to enter in inert gas gathering-device by helium carrier gas and collect;

Inert gas collects step, wherein the argon gas obtained through titanium sponge high temeperature chemistry adsorptive fractionation gas is separated with gas-chromatography the argon gas obtained to merge, send in argon gas collecting pipe together and collect, and gas-chromatography is separated in the Krypton feeding Krypton collecting pipe obtained and collects.

7. the method for separation and Extraction inert gas from environmental gas according to claim 6, wherein:

In described low-temperature fractionation step, under liquid nitrogen temperature, described in physical absorption, remove the environmental gas sample of moisture device feeding with the active carbon be equipped with in the active carbon cylinder in low-temperature fractionation device; And/or

In described titanium sponge chemisorption step, control fractionation gas and fractionation residual gas in low-temperature fractionation process with the mass-flow gas meter in described low-temperature fractionation device and enter the speed of titanium sponge chemisorption apparatus, and record enters the gas flow of described titanium sponge chemisorption apparatus respectively; And/or

In described titanium sponge chemisorption step, at high temperature chemisorbed is carried out with the titanium sponge in described titanium sponge chemisorption apparatus, first remove nitrogen, oxygen, the methane in the fractionation gas of described low-temperature fractionation device feeding, nitrogen, oxygen, methane in rear removing fractionation residual gas; And/or

In described titanium sponge chemisorption step, with the pyroreaction pipe in described titanium sponge chemisorption apparatus as the container reacted between titanium sponge and gas.

8. the method for separation and Extraction inert gas from environmental gas according to claim 6, is wherein effectively separated and enrichment volume fraction respectively differs argon gas and the Krypton of four orders of magnitude.

9. the method for separation and Extraction inert gas from environmental gas described in any one in claim 6-8, wherein said environmental gas is selected from solution gas in air, geothermal gas, Groundwater solution, surface water solution gas, ocean water solution gas and ice core.

10. the purposes that the separated in synchronization that the system described in any one in claim 1-5 or the method described in any one in claim 6-9 are used for microlitre magnitude Krypton and hundred milliliters of magnitude argon gas is extracted.