Method for catalytically gasifying coal

A coal catalytic gasification and catalyst technology, which is applied in the manufacture of combustible gas, bulk chemical production, petroleum industry, etc., can solve the problems of easy loss, equipment corrosion, good fluidity, etc. The effect of chemical activity and simplified process

Active Publication Date: 2013-12-25
ENN SCI & TECH DEV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although K has good catalytic performance for coal gasification, transformation and methanation, K is easy to lose due to its good fluidity, which is easy to cause corrosion of equipment; in addition, K is easy to combine with minerals in coal to form aluminosilicate, which leads to catalyst deactivation. The catalytic performance is unstable; at the same time, aluminosilicate is insoluble in water, which increases the difficulty and economic cost of K recovery

Method used

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  • Method for catalytically gasifying coal
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  • Method for catalytically gasifying coal

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Embodiment approach

[0023] A typical but non-limiting embodiment of the present invention is as follows: a coal catalytic gasification method, comprising the steps of:

[0024] (1) Add Ca-containing compounds, K-containing compounds, Na-containing compounds, raw coal and water into the reactor, and mix them for 0.1-2.0 hours at a pressure of 0.1-1.0MPa and a temperature of 50-180°C to achieve simultaneous Preparation of Ca-based catalysts and coal pretreatment;

[0025] (2) Gasifying the product of step (1).

[0026] The amount of the Ca-containing compound is 2.0-15.0wt% as CaO, and the amount of the K-containing compound is calculated as K 2 CO 3 Calculated as 0.2-8.0wt%, the amount of the Na-containing compound is calculated as Na 2 CO 3 Calculated as 0.03-1.2wt%, the amount of each compound is based on the quality of raw coal, and the Ca-K-Na ternary component is the catalyst active component.

[0027] The invention generates a certain amount of ion exchange sites on the coal surface by ...

Embodiment 1

[0047] Weigh 100g of Buliangou bituminous coal, 5.0g of CaO, 0.3g of NaOH, 3.0g of KOH, and 100g of deionized water, and add them into the autoclave in sequence. Feed N into the kettle 2 , pressurize to 0.35MPa, and then raise the temperature to 90°C while stirring. After the temperature rises to the set temperature, continue to stir for 0.5h, then stop heating, and when the temperature drops to room temperature, release the pressure and pour out the coal sample. Put the coal sample in a hot air circulation drying oven at 105 ° C for 12 hours, and the sample obtained accordingly is recorded as Ca-K-Na-1. The gasification evaluation results of this sample are shown in Table 1.

Embodiment 2

[0049] Weigh 100g of Buliangou bituminous coal, 5.0g of CaO, 3.0g of KOH, 0.3g of NaOH, and 100g of deionized water, and add them into the autoclave in sequence. Then, the temperature was raised to 90° C. while stirring, and the pressure was 0.1 MPa at this time. After the temperature rises to the set temperature, continue to stir for 0.5h, then stop heating, and when the temperature drops to room temperature, release the pressure and pour out the coal sample. Put the coal sample in a hot air circulation oven and dry it at 105°C for 12 hours, and the sample thus obtained is designated as Ca-K-Na-2. The gasification evaluation results of this sample are shown in Table 1.

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Abstract

The invention relates to a method for catalytically gasifying coal. The method comprises the following steps of (1) adding a Ca-containing compound, a K-containing compound, a Na-containing compound, raw coal and water into a reactor, mixing for 0.1-2.0 hours at a temperature of 50-180 DEG C and a pressure of 0.1-1.0MPa to synchronously realize preparation of a Ca-based catalyst and pretreatment of coal; and (2) gasifying the product in the step (1). According to the method, high gasification and methanation activities can be obtained, and the catalyst is good in stability, cannot be inactivated easily and can be simply recycled.

Description

technical field [0001] The invention relates to the field of coal catalytic gasification, in particular, the invention relates to a coal catalytic gasification method. Background technique [0002] my country's overall energy characteristics are "rich in coal, less in oil, and lack of gas". Converting coal into methane, the highest-quality fuel among fossil energy sources, is a shortcut that suits my country's national conditions, is clean and environmentally friendly, and ensures energy security. [0003] Compared with the traditional coal gasification technology, the coal catalytic gasification technology significantly reduces the gasification temperature and accelerates the gasification rate. Coal catalytic gasification is to add a suitable catalyst to the coal, so that the three reactions of gasification, shift and methanation are coupled in the same reactor, thus greatly improving the energy efficiency of the system and reducing the investment of subsequent transformati...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10J3/00C10J3/58C10J3/72
CPCY02P20/52
Inventor 王会芳金亚丹裴增楷毕继诚
Owner ENN SCI & TECH DEV
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