CN117821134A - Liquid fuel with high combustion efficiency - Google Patents

Abstract

The invention discloses a liquid fuel with high combustion efficiency. The weight percentage of the liquid fuel with high combustion efficiency mentioned in the invention is: 10-30% of tetrahydrodicyclopentadiene, 69.8-90% of cyclopentadiene trimer, and 0.1% of cerium cyclohexaneate. The volume calorific value of the liquid fuel with high combustion efficiency of the invention is 44.7-45.0 MJ/L, the density at 20°C is 1.016-1.000 g/cm ³ , and the combustion efficiency is 90.5-91.1%. The liquid fuel of the invention is mainly used as a power source and cooling source of an aircraft engine.

Description

A liquid fuel with high combustion efficiency

Technical Field

The invention belongs to the technical field of liquid high-energy fuel formulation, and in particular relates to a liquid high-energy fuel with high calorific value and high combustion efficiency for aircraft engines.

Background technique

The new generation of horizontal take-off and landing, wide speed range, long-range, and hypersonic aircraft solves the technical problem of the "thrust gap" by combining engines. In order to reduce the total volume of the fuel tank and the aircraft and improve the density specific impulse, new and higher requirements are also put forward for the fuel. Hanging tetrahydrodicyclopentadiene (JP-10) is a type of artificially synthesized storable liquid hydrocarbon fuel with high density (0.935 g/cm ³ ) and high volume calorific value (39.3 MJ/L). It has been widely equipped in the US military's "Tomahawk" cruise missile and some types of weapons and equipment of our army. However, due to its very stable multi-ring structure, this type of high-density fuel has the problem of poor combustion efficiency in actual aviation engine applications, especially in hypersonic flight environments (high altitude, low temperature, and hypoxia). Therefore, improving the combustion performance of high-density fuel is one of the key technologies for the application of high-density fuel. In addition, with the rapid development of high-tech weapons and equipment, the volume calorific value of high-density hydrocarbon fuel JP-10 is becoming increasingly difficult to meet new application requirements.

The document "Research on Combustion Promotion of High-Density Fuel JP-10 [C]. The First National Conference on Combustion Chemistry of the Chinese Chemical Society, 2015, Chengdu, Sichuan" reported the combustion efficiency of liquid high-density hydrocarbon fuel JP-10. This fuel has the problems of low volume calorific value and poor combustion efficiency, which has become a technical "bottleneck" restricting the rapid development of high-tech weapons and equipment.

Summary of the invention

The purpose of the present invention is to provide a liquid high-energy fuel with high combustion efficiency in view of the shortcomings and defects of the background technology.

In order to achieve the above purpose, the present invention adopts two high-energy fuel monomers to prepare a high calorific value and high-density basic hydrocarbon fuel, and then adds a trace amount of the combustion-promoting additive cerium cyclopentaneate to improve the combustion efficiency of the fuel, thereby preparing a liquid high-energy fuel with high combustion efficiency. Specifically, the volume calorific value of hanging tetrahydrodicyclopentadiene is 39.3 MJ/L, the density is 0.935 g/cm ³ , the volume calorific value of cyclopentadiene trimer is 45.2 MJ/L, the density is 1.03 g/cm ³ , the two are compounded according to a certain weight percentage composition to improve the volume calorific value and density of the fuel, and then 0.1% of the combustion-promoting additive cerium cyclopentaneate is added to improve the combustion efficiency of the high-energy fuel.

A liquid fuel with high combustion efficiency is composed of the following components: tetrahydrodicyclopentadiene, cyclopentadiene trimer and cerium naphthenate.

Preferably, the invention is composed of the following components in weight percentage: 10-30% of exo-tetrahydrodicyclopentadiene, 69.8-90% of cyclopentadiene trimer, and 0.05-0.2% of cerium cycloalkanoate.

More preferably, it is composed of the following components in weight percentage: 10% of exo-tetrahydrodicyclopentadiene, 89.9% of cyclopentadiene trimer, and 0.1% of cerium cycloalkanoate.

More preferably, it is composed of the following components in weight percentage: 20% of exo-tetrahydrodicyclopentadiene, 79.9% of cyclopentadiene trimer, and 0.1% of cerium cycloalkanoate.

The preparation method of the liquid high-energy fuel with high combustion efficiency of the present invention is as follows: 69.8-90% by mass of cyclopentadiene trimer, 10-30% by mass of tetrahydrodicyclopentadiene, and 0.05-0.2% by mass of cerium cyclopentaneate are added into a container. The temperature of the system is controlled at 20-30°C, and the mixture is stirred for 0.5-2h. After the preparation, the obtained fuel is filtered with a filter paper with a medium pore size of 30-50μm to remove metal mechanical impurities and dust that may be mixed in the fuel, and then the fuel is soaked and washed with a mass fraction of 10-20% acetone aqueous solution, vacuum dried at 300°C, and dehydrated through a 3Å molecular sieve to obtain the corresponding liquid high-energy fuel with high combustion efficiency.

Beneficial effects of the present invention: The volume calorific value of the high-combustion-efficiency liquid high-energy fuel prepared by the present invention is 44.7-45.0 MJ/L, and the density (20°C) is 1.016-1.000 g/cm ^3. Compared with the prior art hanging tetrahydrodicyclopentadiene (JP-10), the volume calorific value is increased by 14%-15%, and the density is increased by 7%-9%. The liquid high-energy fuel provided by the present invention has high combustion efficiency. Under the condition that the residual gas coefficient α is 1.2, the combustion efficiency is 90.5-91.1%, while the combustion efficiency of the high-density fuel JP-10 in the comparative document is low, and the combustion efficiency under the same conditions is only 85.9%.

Detailed ways

The present invention is further described in detail below in conjunction with specific embodiments, but the protection scope of the present invention is not limited thereto, and all technologies implemented according to the present invention are within the protection scope of the present invention.

The volume calorific value test standard of the liquid high-energy fuel with high combustion efficiency is GB/T 384-1981 (2004).

The viscosity test standard of the liquid high-energy fuel with high combustion efficiency is GB/T 265-1988 (2004).

The density (20°C) test standard of the liquid high-energy fuel with high combustion efficiency is GB/T 1884-2000 (2004).

The combustion efficiency test method of this high-combustion-efficiency liquid high-energy fuel is consistent with the combustion efficiency test method in the comparative document "Research on Combustion Promotion of High-Density Fuel JP-10 [C]. The First National Combustion Chemistry Academic Conference of the Chinese Chemical Society, 2015, Chengdu, Sichuan" (oxygen bomb simulation method).

Example 1

This embodiment is implemented with reference to the following weight percentage composition: 10% of exo-tetrahydrodicyclopentadiene, 89.9% of cyclopentadiene trimer, and 0.1% of cerium cycloalkanoate.

Preparation method: In a round-bottom flask, add 10 g of tetrahydrodicyclopentadiene, 89.9 g of cyclopentadiene trimer and 0.1 g of cerium cyclopentaneate, control the temperature of the system at 20°C, stir for 2 hours. After the preparation is completed, filter the obtained fuel sample with a 40μm medium pore size filter paper to remove metal mechanical impurities and dust that may be mixed in the fuel, and then soak and wash with 10g of 18% by mass acetone aqueous solution, vacuum dry at 300°C, and dehydrate through 3Å molecular sieve to obtain a liquid high-energy fuel with high combustion efficiency.

Performance of liquid high-energy fuel with high combustion efficiency:

Volume calorific value 45.0 MJ/kg;

Density (20℃) 1.016 g/ ^cm3 ;

Combustion efficiency 91.1%.

Example 2

This embodiment is implemented with reference to the following weight percentage composition: 20% of exo-tetrahydrodicyclopentadiene, 79.9% of cyclopentadiene trimer, and 0.1% of cerium cycloalkanoate.

Preparation method: In a round-bottom flask, add 20g of tetrahydrodicyclopentadiene, 79.9g of cyclopentadiene trimer and 0.1g of cerium cyclopentaneate, control the temperature of the system at 25°C, stir for 1h. After the preparation, filter the obtained fuel sample with a 35μm medium pore size filter paper to remove metal mechanical impurities and dust that may be mixed in the fuel, then soak and wash with 15g of 15% by mass acetone aqueous solution, vacuum dry at 300°C, and dehydrate through 3Å molecular sieve to obtain liquid high-energy fuel with high combustion efficiency.

Performance of liquid high-energy fuel with high combustion efficiency:

Volume calorific value 44.9 MJ/kg;

Density (20℃) 1.006 g/ ^cm3 ;

Combustion efficiency 90.8%.

Example 3

This embodiment is implemented with reference to the following weight percentage composition: 30% of exo-tetrahydrodicyclopentadiene, 69.9% of cyclopentadiene trimer, and 0.1% of cerium cycloalkanoate.

Preparation method: In a round-bottom flask, add 30g of tetrahydrodicyclopentadiene, 69.9g of cyclopentadiene trimer and 0.1g of cerium cyclopentaneate, control the temperature of the system at 30°C, stir for 0.5h. After the preparation, filter the obtained fuel sample with a 50μm medium pore size filter paper to remove metal mechanical impurities and dust that may be mixed in the fuel, then soak and wash with 20g of 12% by mass acetone aqueous solution, vacuum dry at 300°C, and dehydrate through 3Å molecular sieve to obtain liquid high-energy fuel with high combustion efficiency.

Performance of liquid high-energy fuel with high combustion efficiency:

Volume calorific value 44.7 MJ/kg;

Density (20℃) 1.000 g/ ^cm3 ;

Combustion efficiency 90.5%.

Comparative Example 1

This embodiment is implemented with reference to the following weight percentage composition: 99.9% of exo-tetrahydrodicyclopentadiene and 0.1% of cerium cyclopentaneate.

Preparation method: In a round-bottom flask, add 99.9 g of tetrahydrodicyclopentadiene and 0.1 g of cerium cyclopentaneate, control the temperature of the system at 20°C, and stir for 2 hours. After the preparation is completed, filter the obtained fuel sample with a 40μm medium pore size filter paper to remove metal mechanical impurities and dust that may be mixed in the fuel, and then soak and wash with 10g of 18% by mass acetone aqueous solution, vacuum dry at 300°C, and dehydrate through 3Å molecular sieve to obtain a liquid high-energy fuel with high combustion efficiency.

Performance of liquid high-energy fuel with high combustion efficiency:

Volume calorific value 40.2 MJ/kg;

Density (20℃) 1.002 g/ ^cm3 ;

Combustion efficiency 86.2%.

Comparative Example 2

This embodiment is implemented with reference to the following weight percentage composition: 99.9% cyclopentadiene trimer and 0.1% cerium cycloalkanoate.

Preparation method: In a round-bottom flask, add 99.9g of cyclopentadiene trimer and 0.1g of cerium cyclohexaneate, control the temperature of the system at 20°C, and stir for 2h. After the preparation, filter the obtained fuel sample with a 40μm medium pore size filter paper to remove metal mechanical impurities and dust that may be mixed in the fuel, and then soak and wash with 10g of 18% by mass acetone aqueous solution, vacuum dry at 300°C, and dehydrate through 3Å molecular sieve to obtain a liquid high-energy fuel with high combustion efficiency.

Performance of liquid high-energy fuel with high combustion efficiency:

Volume calorific value 38.9 MJ/kg;

Density (20℃) 0.998g/ ^cm3 ;

Combustion efficiency 82.3%.

The above-mentioned embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims (5)

1. A liquid fuel with high combustion efficiency, which is characterized by comprising the following components: hanging tetrahydrodicyclopentadiene, cyclopentadiene trimers and cerium naphthenate.

2. The high combustion efficiency liquid fuel of claim 1, comprising the following components in weight percent: 10-30% of hanging tetrahydrodicyclopentadiene, 69.8-90% of cyclopentadiene trimer and 0.05-0.2% of cerium naphthenate.

3. The high combustion efficiency liquid fuel of claim 2, comprising the following components in weight percent: 10% of hanging tetrahydrodicyclopentadiene, 89.9% of cyclopentadiene trimer and 0.1% of cerium naphthenate.

4. The high combustion efficiency liquid fuel of claim 2, comprising the following components in weight percent: 20% of hanging tetrahydrodicyclopentadiene, 79.9% of cyclopentadiene trimer and 0.1% of cerium naphthenate.

5. The method for producing a liquid fuel of high combustion efficiency according to claim 1, characterized by comprising the steps of: adding 69.8-90% of cyclopentadiene trimer, 10-30% of hanging tetrahydrodicyclopentadiene and 0.05-0.2% of cerium naphthenate in a container; the temperature of the system is controlled at 20-30 ℃, stirring is carried out for 0.5-2 h, after preparation is finished, the obtained fuel is filtered by filter paper with the pore diameter of 30-50 mu m, then the fuel is soaked and washed by acetone aqueous solution with the mass fraction of 10-20%, then is dried in vacuum at 300 ℃, and is dehydrated by a 3A molecular sieve, so that the liquid fuel with high combustion efficiency can be obtained.