SU1546116A1 - Method of cleaning gaseuos mixture from nitrogen oixide - Google Patents

Abstract

This invention relates to a catalytic process for the purification of flue gases from NO, which makes it possible to reduce the process temperature. A gas mixture containing NO and CO at 1 vol.%, Is passed at a space velocity of 10,000-40000 h ^-1 through a catalyst containing, in wt.%: AL ₂ O _3, 0.645-0.665

CR ₂ O ₃ 0.032-0.067

NIO 0.134-0.194

CUO 0.129-0.134. 100% reduction in NO is achieved at 200-205 ° C and 10,000 h ^-1 , at 230 ° C and 20,000 h ^-1 and at 285 ° C and 40,000 h ^-1 . 1 hp ff, 2 tab.

Description

The invention relates to the purification of a gas mixture from N0 and may find application in catalytic purification of waste gases.

The goal of the acquisition is to reduce the process temperature.

Example. In a laboratory reactor, placed in an oven, was loaded

1 ml of catalyst. Missed the gas mixture containing,%: N0 1} CO 1; Not . The volumetric flow rate of the gas mixture is 10000-40000.

In tab. 1 shows the results of restoring N0 at a space velocity of 10,000.

Table 1

§

k /

ate

four

ABOUT

In tab. Table 2 shows the results of reducing N0 on a catalyst containing in molar fractions:

0.645; Cr203 0.032, N10 0.194, CuO 0.129 at volumetric transmission rates of the gas mixture of 200CO and 40000 h.

15461164

Table 2 PR 300-400 ° C for 2-3 hours and then at 400 ° C for 4 hours.

The cleaning method at a speed of 40,000 was carried out for 40 hours, while a decrease in the degree of reduction was not observed.

The catalysts were prepared by mixing the nitrates of Al, Cr, Ni, and Cu, taken in the required ratio, heating the mixture at 300-400 ° C until complete decomposition of the nitrates, calcining at 700 ° C for 4 h, rubbing the resulting mass into powder, mixing with solution Ш03 with at a concentration of 0.1 m / l to obtain a plastic mass, drying it made from a mass of granules on a dryness, and calcining them

Editor Y. Sereda

Compiled by G.Vinokurova

Tehred L. Serdyukova Proofreader T. Malets

Order 38

Circulation 564

VNIIPI State Committee for Inventions and Discoveries at GK11T SSTR 113035, Moscow, Zh-35, 4/5, Raushsk nab.

As follows from the data table. 1 and the proposed method allows the process temperature to be reduced to 200-205 ° C with a flow rate of the purified gas mixture of 10,000 and a 100% reduction rate of N0 versus 223 C under the same conditions.

Claims (2)

1. A method of purifying a gas mixture from nitrogen oxide by reducing carbon to carbon monoxide on a catalyst containing oxides of aluminum, copper, chromium and a transition metal to nitrogen, characterized in that, in order to reduce the process temperature, a catalyst containing nickel oxide as a transition metal is used with the following ratio of ingredients in molar dot x: alumina 0.645-0.665 Nickel oxide 0.134-1.194 Chromium (III) oxide 0,032-0,067 Copper (II) oxide 0 five 0 2. The method according to p, y u u and so, one, 0,129-0,134 about t of l and h and the process lead at a volume rate of 10,000-40000 hours Subscription