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[Chemical Knowledge]：The production and manufacturing method and process of coal-based diesel oil.

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The manufacturing method
of coal-to-diesel
1. Introduction

With the transformation of the global energy structure and the improvement of environmental protection requirements, coal-to-diesel as a clean and efficient energy product has gradually received widespread attention. The production process of coal-to-diesel involves many links, including coal gasification, syngas purification, Fischer-Tropsch synthesis and so on. In this paper, the manufacturing method of coal to diesel is introduced in detail.

2. the raw material for the production of coal-based diesel fuel

The raw material for the production of coal-based diesel fuel is mainly coal. Coal goes through processes such as gasification, purification and synthesis, and is eventually converted into diesel. In the selection of coal raw materials, the ash, sulfur, volatile and other indicators should be considered to ensure the smooth progress of the production process and the stability of product quality.

3. Coal-based Diesel Production Process

1. Coal Gasification
Coal gasification is the first step in the production of coal-based diesel. Under the condition of high temperature and high pressure, coal reacts with oxygen and water vapor to generate synthesis gas (mainly composed of carbon monoxide and hydrogen). Gasification process can use fixed bed, fluidized bed or air flow technology.
2. Syngas purification
Syngas contains impurities, such as hydrogen sulfide, carbon dioxide, etc., which need to be purified. The purification process usually uses physical absorption, chemical absorption or catalytic oxidation to remove impurities and ensure the purity of the synthesis gas.
3. Fischer-Tropsch synthesis
The purified synthesis gas enters the Fischer-Tropsch synthesis reactor, and under the action of the catalyst, a carbon chain growth reaction occurs to generate liquid hydrocarbon products. Fischer-Tropsch synthesis can use low-temperature Fischer-Tropsch synthesis or high-temperature Fischer-Tropsch synthesis technology, according to product requirements and process conditions.
4. Product separation and upgrading
Fischer-Tropsch synthesis products are mixed hydrocarbons, which need to be separated from other products by distillation, extraction and other separation technologies. In order to improve the quality of diesel products, it is also necessary to carry out desulfurization, denitrification and other upgrading treatments.

4. coal-based diesel production equipment

coal-based diesel production equipment mainly includes coal gasifier, syngas purification device, Fischer-Tropsch synthesis reactor, product separation and upgrading device. These devices need to have high temperature, high pressure, corrosion resistance and other properties to ensure the smooth progress of the production process. Optimization
of production technology of coal-to-diesel oil in

5.
In order to improve the production efficiency and economy of coal-to-diesel oil, it is necessary to optimize the production technology continuously. Specifically, it includes:

1. Select high-efficiency catalyst to improve the reaction rate and selectivity of Fischer-Tropsch synthesis;
2. Optimize the synthesis gas purification process to reduce energy consumption and cost;
3. Strengthen equipment maintenance and operation management to improve equipment reliability and operation efficiency. Environmental protection and safety
of

6. coal-to-diesel production The production process of
coal-to-diesel will produce certain pollutants such as exhaust gas, waste water and solid waste, and environmental protection needs to be strengthened. At the same time, the production process involves high temperature and high pressure, flammable and explosive and other dangerous factors, so it is necessary to strengthen the management of production safety to ensure the safety of employees and equipment.

7. conclusion

coal diesel as a clean and efficient energy products, has broad market prospects. By optimizing the production process and equipment, strengthening environmental protection and safety management, the production efficiency and economy of coal-to-diesel can be further improved, and contribute to the green development of chemical production raw materials.

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