Method for coal desulfurization catalyzed by microwave

A microwave catalysis and coal technology, which is applied in the field of coal desulfurization, can solve the problems of desulfurization technology that does not destroy the coal matrix structure, has no high desulfurization efficiency, and is limited in the scope of application, so as to improve the quality of coal and the scope of use, and achieve good promotion and application value. , the effect of improving utilization

Inactive Publication Date: 2008-08-27
NANJING UNIV
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Problems solved by technology

[0004] The invention with the application number 97116584.X discloses a deep physical desulfurization method for coal. After the coal is crushed, it is separated by emulsification and high-shear stirring to obtain low-sulfur coal. However, only inorganic sulfur can be removed, and the desulfurization rate is not high. High problem; the application number is 03137590.1, which discloses a new process for reducing the sulfur content of coke and a corresponding series of sulfur removal agents, which is a method of using metal compounds to convert solid sulfur in coal into volatile sulfur compounds to achieve The purpose of the

Method used

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  • Method for coal desulfurization catalyzed by microwave
  • Method for coal desulfurization catalyzed by microwave
  • Method for coal desulfurization catalyzed by microwave

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0025] Example 1:

[0026] Crush 40 grams of raw coal (Shandong Guohong pulverized coal, Shandong Xuecheng Shanjia village fat coal, and live chicken rabbit coal) after crushing (particle size less than 0.3mm); add to 60 grams of water and stir for 2 minutes to obtain a more uniform dispersion system; Add 100 ml of 4 moles of alkali solution (optionally sodium hydroxide, potassium hydroxide) per liter and transfer to a 250 ml conical flask, put it in a microwave oven for 6 minutes of microwave thermal desulfurization reaction, and perform microwave radiation catalysis; Wash and filter with a small amount of water, add 20 ml each time, and wash until the pH of the filtrate is less than 9. After the filter cake is soaked in 5 moles of hydrochloric acid for 5 minutes, it is heated and boiled for 15 minutes and then allowed to stand for cooling; finally, it is filtered and dried. In this example, a microwave oven is used for microwave radiation catalysis. The wavelength frequency of t...

Example Embodiment

[0030] Example 2: Heating condition experiment

[0031] Process according to the method described in Example 1, the difference is that one of them is microwave heating for 6 minutes, and the other two experiments are heating in other ways, and keep the system temperature at 80 and 90°C for 24 hours. Other treatment methods and reactions The conditions are the same.

[0032] Comparison of the catalytic effects of microwave and other heating methods: (Coal sample: Fertilizer coal from Shandong Xuechengshanjia Village)

[0033] Means

Example Embodiment

[0034] Example 3: Microwave treatment time experiment

[0035] The treatment was carried out according to the method described in Example 1, except that the microwave treatment time was set to 2, 3, 4, 5, 6, 7, 8 minutes, and other treatment methods and reaction conditions were the same.

[0036] Comparison of microwave time effects: (Coal sample: Fertilizer coal in Shandong Xuechengshanjia Village)

[0037] Time / min

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Abstract

The invention discloses a coal desulfurization method which utilizes microwave to catalyze, which comprises the following steps: utilizing water to be dissolvent, leading coal and auxiliary agent mixture to form more even disperse system through physically stirring, and doing a thermal desulfurization reaction under the catalytic action of microwave. The method has the advantages that firstly, the method has excellent desulfurization efficiency under the premise without damaging coal quality structure, secondly, the method has high reaction efficiency and excellent statute of limitation, thirdly, the method has simple operation, whose auxiliary agent is easy to get, and the method has wide popularization using value.

Description

technical field [0001] The invention relates to a coal desulfurization method, in particular to a coal desulfurization method utilizing microwave catalysis. Background technique [0002] With the rapid development of the international economy, energy and environmental issues have become increasingly prominent. On the one hand, the high consumption of energy has brought high demand for resources, but at the same time, a large amount of resources in the world are wasted due to quality problems, and the energy shortage is imminent; on the other hand, the massive use of energy has caused the deterioration of environmental problems, While seriously affecting economic development, it also greatly threatens the living environment of human beings. The above problems are clearly reflected in coal, an important energy resource in my country. In China, due to the excessive emission of sulfur dioxide to the atmosphere due to the massive combustion of coal, my country's total sulfur di...

Claims

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Application Information

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IPC IPC(8): C10L9/02
Inventor 胡柏星何其慧蔡军傅家伟施源
Owner NANJING UNIV
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