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High-efficiency low-temperature catalysis gasification method for coal

A high-efficiency, low-temperature technology, used in the manufacture of combustible gas, the petroleum industry, and the combination of fuel pre-dry distillation, etc., can solve the problem of not being promoted for industrial application

Inactive Publication Date: 2008-12-10
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Catalytic gasification, despite its unique advantages, has not been extended to industrial applications

Method used

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  • High-efficiency low-temperature catalysis gasification method for coal
  • High-efficiency low-temperature catalysis gasification method for coal
  • High-efficiency low-temperature catalysis gasification method for coal

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Experiment 1:

[0040] Coal sample A is heated and pyrolyzed in a fixed-bed reactor at 900°C, and the yield of coal char is 80% (dry basis), and the release rate of the generated gas is generated when the coal char is vaporized in a fixed-bed reactor at 750°C Such as figure 1 shown.

[0041] Experiment 2:

[0042] Add 10% potassium carbonate to the coal coke obtained from the same coal sample, mix well, and carry out steam gasification at 750°C, the release rate of the generated gas is as follows figure 2 shown.

[0043] Experiment 3:

[0044] Add 10% calcium hydroxide to coal sample A, pyrolyze it at 900°C, mix the obtained char with 10% potassium carbonate, and gasify it at 750°C, the release rate of the generated gas is as follows: image 3 shown.

[0045] In the above three gasification experiments, except for the presence or absence of additives, the other pyrolysis and gasification conditions are the same, and the release rate of the generated gas reflects ...

Embodiment 2

[0048] Experiment 4:

[0049] Coal sample B is heated and pyrolyzed in a fixed-bed reactor at 700°C, and the yield of coal char is 88% (dry basis), and the release rate of the gas produced by steam gasification of coal char in a fixed-bed reactor at 750°C Such as Figure 4 shown.

[0050] Experiment 5:

[0051] Coal char obtained from the same coal sample is added with 10% potassium carbonate, mixed evenly, and steam gasified at 750°C, the release rate of the generated gas is as follows: Figure 5 shown.

[0052] Experiment 6:

[0053] Coal sample A is added with 10% calcium hydroxide and pyrolyzed at 700°C. The obtained coal char is then mixed with 10% potassium carbonate and gasified at 750°C. The release rate of the generated gas is as follows: Figure 6 shown.

[0054] In the above three experiments, except for the presence or absence of additives, the other pyrolysis and catalytic conditions are the same, which reflects the influence of the presence or absence of ad...

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Abstract

The present invention relates to a highly effective low temperature catalytic gasification method for coal. The method comprises the following steps that: an additive is mixed with coal at a pyrolysis temperature of between 500 and 900 DEG C, wherein the additive is selected from calcium hydroxide, lime and limestone, and the weight of the additive is between 5 and 20 percent of the that of the coal, and the pyrolysis lasts 15 to 60 minutes to carry out pretreatment passivation for the coal; and the coal processed by the pretreatment passivation is catalytically gasified.

Description

technical field [0001] The invention relates to the field of coal catalytic gasification and provides a coal high-efficiency low-temperature catalytic gasification method. Background technique [0002] Coal is a solid fuel with a variety of pollutants (such as sulfur, nitrogen, trace toxic elements, etc.), and it is very inefficient to directly use coal as household combustion, and it will cause various environmental pollution. Using coal gasification technology to convert coal into gaseous fuel is one of the most effective ways to use coal efficiently and cleanly. Coal gasification technology can also generate synthesis gas, which can be used to generate various important chemical products such as synthetic ammonia and methanol. Therefore, coal gasification technology has the prospect of large-scale industrial production from a very early stage, and with the development of coal gasification and chemical polygeneration technology, the scale of coal gasification in my countr...

Claims

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Application Information

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IPC IPC(8): C10J3/66C10J3/58
Inventor 王杰曹建勤姚奕竑
Owner EAST CHINA UNIV OF SCI & TECH
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