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[Chemical Knowledge]：Properties and Uses of Coal-based Diesel

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The nature and use
of coal-based diesel oil
1. Introduction

With the progress of science and technology and the transformation of energy structure, coal-based diesel oil, as an important raw material for chemical production, is more and more widely used in the field of energy and chemical industry. Coal-based diesel not only has the advantages of high calorific value, low sulfur and low aromatics, but also has a wide range of applications in power machinery, transportation, electric power, industrial combustion and other fields. This article will detail the nature and use of coal-based diesel.

2. coal diesel oil properties

1. physical properties

coal diesel oil is generally light yellow or colorless transparent liquid, with high density and viscosity, high ignition point, moderate volatility.

2. chemical properties

coal diesel is mainly composed of hydrocarbons, the number of carbon atoms is generally between 10-22. The cetane number of coal-based diesel is high, the combustion performance is good, the calorific value is high, the sulfur content and the aromatic content are low, and the environmental protection performance is good. The use of

3. coal-based diesel

1.

in the field of power machinery Coal-based diesel can be used as fuel for internal combustion engines for power generation, ships, agricultural machinery, construction machinery and other fields. Because of its good combustion performance and high calorific value, it can improve the efficiency and power output of the internal combustion engine.

2.

in the field of transportation Coal-based diesel can be used to replace part of petroleum diesel as a fuel in the field of transportation. In the field of long-distance transportation and logistics, the high calorific value and low sulfur content of coal-based diesel can improve the fuel economy and environmental protection of vehicles.

3. industrial combustion field

coal diesel can be used in industrial combustion equipment, such as boilers, kilns and so on. Because of its high combustion efficiency and low pollutant emission, it can improve the energy efficiency and environmental protection performance of industrial combustion equipment. The production process
of

4. coal-to-diesel fuel The production process of
coal-to-diesel fuel mainly includes coal gasification, synthesis gas purification, Fischer-Tropsch synthesis and other steps. Among them, coal gasification is the conversion of coal into syngas (CO H2); syngas purification is the removal of impurities in the syngas produced by coal gasification to obtain pure syngas; Fischer-Tropsch synthesis is the process of converting syngas into hydrocarbons, including chain initiation, chain extension, chain termination and other steps. Hydrocarbon compounds with different carbon numbers can be obtained by Fischer-Tropsch synthesis, and the C10-C22 hydrocarbon compounds are the main components of coal-based diesel oil. The development prospect of

5. coal-based diesel oil

With the continuous progress of technology and the improvement of environmental protection requirements, the development prospect of coal-based diesel oil is very broad. In the future, the production technology of coal-to-diesel will be further improved, the production cost will continue to decrease, and the application field will continue to expand. At the same time, with the transformation of global energy structure and the development of low-carbon economy, coal-based diesel, as a clean and efficient energy chemical raw material, will play a more important role in the future energy market.

6. conclusion

coal diesel as an important chemical raw material, with high calorific value, low sulfur, low aromatics and other advantages, widely used in power machinery, transportation, industrial combustion and other fields. In the future, with the continuous advancement of technology and the expansion of application fields, the development prospects of coal-based diesel will be broader.

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