A liquid high calorific value hydrocarbon fuel

Abstract

The invention discloses a liquid high calorific value hydrocarbon fuel. The weight percentage of the high calorific value hydrocarbon fuel of the invention is as follows: 10% to 40% of n-hexyl carborane, pentacyclic [6.3.1.0 2,7 .0 3,5 .0 9,11 The high calorific value hydrocarbon fuel of the present invention has a volume calorific value of 49.8 MJ / L~51.0 MJ / L and a density of 0.982 g / cm at 20°C. 3 ~1.026 g / cm 3 , and the flash point is 61° C. to 67° C. The hydrocarbon fuel of the present invention is mainly used as a power source and a cooling source for aircraft engines.

Description

Technical Field

[0001] The invention relates to a liquid high calorific value hydrocarbon fuel, in particular to a liquid high calorific value fuel for an aviation engine, and belongs to the technical field of high energy fuel formulation. Background Art

[0002] With the rapid development of modern aircraft design technology, the speed and range of aircraft have been greatly improved. High calorific value fuels have higher combustion heat and can effectively increase the range and speed of missiles. The volumetric combustion heat of hydrocarbon fuels is an important indicator for measuring the performance of fuels. JP-10 is a typical liquid hydrocarbon fuel, which is widely used in rockets, high-speed aircraft and cruise missiles in various countries. Its density is 0.935g / cm 3 The volume calorific value is only 39.4MJ / L, which can no longer meet the requirements of modern aircraft.

[0003] The paper "A solar-energy-derived strained hydrocarbon as an energetic hypergolic fuel. [J] RSC Adv., 2014, 4, 50998-51001" reported a tetracycloheptane (tetracyclo[3.2.0.0 2，7 .0 4，6 ]Heptane, QC) fuel, density is 0.98g / cm 3 , with a volume RZ of 43.55MJ / L, is considered to be a high-energy hydrocarbon fuel with excellent performance, but its flash point is only about 11°C, and its safety during use, storage and transportation is poor. Therefore, it is of great significance to develop hydrocarbon fuels with higher volume combustion calorific value and safer use. Summary of the invention

[0004] The purpose of the present invention is to provide a high calorific value hydrocarbon fuel in view of the shortcomings and defects of the background technology.

[0005] In order to achieve the above purpose, the present invention adopts the method of compounding two fuel monomers to prepare a high calorific value hydrocarbon fuel. Hexyl carborane is a liquid carborane derivative with a stable closed boron cage structure, with a volume calorific value of more than 52MJ / L and a density of 0.9g / cm 3 , while the multi-ring fuel has five rings [6.3.1.0 2,7 .0 3,5 .0 9,11 The volumetric net heat of combustion of dodecane is 44.4 MJ / L and its density is 1.03 g / cm 3The two are compounded according to a certain weight percentage, which can greatly increase the volume calorific value of the fuel. At the same time, the flash point of the system is between 61 and 67 ° C, and it is highly safe to use.

[0006] A liquid high calorific value hydrocarbon fuel, comprising the following components: n-hexylcarborane and pentacyclic [6.3.1.0 2,7 .0 3 ,5 .0 9,11 ]

[0007] Preferably, it is composed of the following components in weight percentage: 10-40% of n-hexylcarborane, pentacyclic [6.3.1.0 2 ,7 .0 3,5 .0 9,11 ]Dodecane 60~90%.

[0008] More preferably, it is composed of the following weight percentages: n-hexylcarborane 10%, pentacyclic [6.3.1.0 2, 7 .0 3,5 .0 9,11 ]Dodecane 90%.

[0009] More preferably, it is composed of the following weight percentages: n-hexylcarborane 20%, pentacyclic [6.3.1.0 2, 7 .0 3,5 .0 9,11 ]Dodecane 80%.

[0010] The preparation method of the high calorific value hydrocarbon fuel of the present invention is as follows: in a container, add 60-90% by mass of five rings [6.3.1.0 2,7 .0 3,5 .0 9,11 ] dodecane, and 10-40% by mass of n-hexyl carborane, control the temperature of the system at 20-30°C, stir for 0.5-2h, after the preparation, filter the obtained fuel with a filter paper of 30-50μm medium pore size to remove metal mechanical impurities and dust that may be mixed in the fuel, and then soak and wash with 10-20% by mass acetone aqueous solution and vacuum dry at 300°C. The molecular sieve can be dehydrated to obtain the corresponding high calorific value hydrocarbon fuel.

[0011] Beneficial effects of the present invention: The high calorific value hydrocarbon fuel prepared by the present invention has a volume calorific value of 49.8-51.0 MJ / L and a density (20°C) of 0.982-1.026 g / cm 3The flash point is 61-67°C. Compared with the tetracycloheptane in the prior art, the volume calorific value is increased by 14%-17%. At the same time, the safety performance is greatly improved. DETAILED DESCRIPTION

[0012] 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.

[0013] The volume calorific value test standard of the high calorific value hydrocarbon fuel is GB / T 384-1981 (2004).

[0014] The viscosity test standard of the high calorific value hydrocarbon fuel is GB / T 265-1988 (2004).

[0015] The density (20°C) test standard of the high calorific value hydrocarbon fuel is GB / T 1884-2000 (2004).

[0016] Embodiment 1:

[0017] This example is implemented with reference to the following weight percentage composition: n-hexylcarborane 10%; pentacyclic [6.3.1.0 2,7 .0 3, 5 .0 9,11 ]Dodecane 90%.

[0018] In a round-bottom flask, add 10 g of n-hexylcarborane and 90 g of pentacyclic [6.3.1.0 2,7 .0 3,5 .0 9 ,11 ] dodecane, control the system temperature at 20 ° C, stir for 2 hours, after the preparation, filter the obtained fuel sample with a 40 μm 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 20% by mass acetone aqueous solution and vacuum dry at 300 ° C. Molecular sieves can be dehydrated to obtain high calorific value hydrocarbon fuels.

[0019] Performance of high calorific value hydrocarbon fuels:

[0020] Volume calorific value 49.8MJ / kg;

[0021] Density (20℃) 1.026g / cm 3 ;

[0022] Flash point 61℃.

[0023] Embodiment 2:

[0024] This example is implemented with reference to the following weight percentage composition: n-hexylcarborane 20%; pentacyclic [6.3.1.0 2,7 .0 3, 5 .0 9,11 ]Dodecane 80%.

[0025] In a round-bottom flask, add 20 g of n-hexylcarborane and 80 g of pentacyclic [6.3.1.0 2,7 .0 3,5 .0 9 ,11 ] dodecane, control the system temperature at 25 ° C, stir for 1 hour, after the preparation, filter the obtained fuel sample with a 30 μm 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 15g of 15% acetone aqueous solution by mass, and then dry in vacuum at 300 ° C. Molecular sieves can be dehydrated to obtain high calorific value hydrocarbon fuels.

[0026] Performance of high calorific value hydrocarbon fuels:

[0027] Volume calorific value 50.0MJ / kg;

[0028] Density (20℃) 1.011g / cm 3 ;

[0029] Flash point 63℃.

[0030] Embodiment 3:

[0031] This example is implemented with reference to the following weight percentage composition: 30% n-hexylcarborane; 30% pentacyclic [6.3.1.0 2,7 .0 3, 5 .0 9,11 ]Dodecane 70%.

[0032] In a round-bottom flask, add 30 g of n-hexylcarborane and 70 g of pentacyclic [6.3.1.0 2,7 .0 3,5 .0 9 ,11 ] dodecane, control the system temperature 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, and then soak and wash with 20g of 10% acetone aqueous solution by mass, and then dry it at 300 ° C in vacuum. Molecular sieves can be dehydrated to obtain high calorific value hydrocarbon fuels.

[0033] Performance of high calorific value hydrocarbon fuels:

[0034] Volume calorific value 50.2MJ / kg;

[0035] Density (20℃) 0.996g / cm 3 ;

[0036] Flash point 65℃.

[0037] Embodiment 4:

[0038] This example is implemented with reference to the following weight percentage composition: n-hexylcarborane 60%; pentacyclic [6.3.1.0 2,7 .0 3, 5 .0 9,11 ]Dodecane 40%.

[0039] In a round-bottom flask, add 40 g of n-hexylcarborane and 60 g of pentacyclic [6.3.1.0 2,7 .0 3,5 .0 9 ,11 ] dodecane, control the system temperature at 25 ° C, stir for 1 hour, after the preparation, filter the obtained fuel sample with a 38 μm 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 20g of 18% acetone aqueous solution by mass, and then dry it at 300 ° C in vacuum. Molecular sieves can be dehydrated to obtain high calorific value hydrocarbon fuels.

[0040] Performance of high calorific value hydrocarbon fuels:

[0041] Volume calorific value 51.0MJ / kg;

[0042] Density (20℃) 0.982g / cm 3 ;

[0043] Flash point 67℃.

[0044] Comparative Example 1

[0045] This example is implemented with reference to the following weight percentage composition: n-hexylcarborane 100%.

[0046] In a round-bottom flask, add 100g of n-hexyl carborane, control the temperature of the system at 20℃, 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 20% acetone aqueous solution by mass, and then dry it under vacuum at 300℃. Molecular sieves can be dehydrated to obtain high calorific value hydrocarbon fuels.

[0047] Performance of high calorific value hydrocarbon fuels:

[0048] Volume calorific value 42.3MJ / kg;

[0049] Density (20℃) 1.012g / cm 3 ;

[0050] Flash point: 56°C.

[0051] Comparative Example 2

[0052] This example is implemented with reference to the following weight percentage composition: Pentacyclic [6.3.1.0 2,7 .0 3,5 .0 9,11 ]Dodecane 100%.

[0053] In a round bottom flask, add 100 g of pentacyclic [6.3.1.0 2,7 .0 3,5 .0 9,11 ] dodecane, control the system temperature at 20 ° C, stir for 2 hours, after the preparation, filter the obtained fuel sample with a 40 μm 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 20% by mass acetone aqueous solution and vacuum dry at 300 ° C. Molecular sieves can be dehydrated to obtain high calorific value hydrocarbon fuels.

[0054] Performance of high calorific value hydrocarbon fuels:

[0055] Volume calorific value 43.1MJ / kg;

[0056] Density (20℃) 1.002g / cm 3 ;

[0057] Flash point: 11°C.

[0058] 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

1. A liquid high calorific value hydrocarbon fuel, characterized in that: The composition is composed of the following weight percentages: n-hexyl carborane 10-40%, pentacyclic [6.3.1.0 2,7 .0 3,5 .0 9,11 ]Dodecane 60~90%.