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A method for improving the reactivity of coal char gasification

A technology of coal char gasification and reactivity, which is applied in the direction of gasification process, manufacture of combustible gas, petroleum industry, etc., can solve the problems of easy sintering of calcium, decline of catalytic ability, and reduction of catalytic gasification reaction rate, etc., to achieve improved gasification The effects of reactivity, degree of promotion of synergistic effects, good application prospects and economic benefits

Active Publication Date: 2020-05-01
TAIYUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, because calcium is easy to sinter, and its catalytic ability decreases with the increase of the number of uses and the increase of gasification temperature, resulting in a decrease in the catalytic gasification reaction rate

Method used

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  • A method for improving the reactivity of coal char gasification
  • A method for improving the reactivity of coal char gasification
  • A method for improving the reactivity of coal char gasification

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Example 1: Gasification experiment of deashed Wucaiwan coal.

[0027] Wucaiwan coal is a long-flame coal rich in inertinite from Wucaiwan area of ​​Xinjiang. Its ash composition is characterized by high calcium, high sodium and low clay minerals. The raw coal samples of Wucaiwan were obtained by the quartering method, and after crushing, grinding, and screening, the coal samples with a particle size of less than 0.178mm were selected for experiments.

[0028] The raw coal of Wucai Bay was pickled with HCl and HF to remove minerals. First, mix the coal sample and 6mol / L HCl in a beaker at a ratio of 1g / 10mL, stir at room temperature for 12 hours, filter the mixture of coal sample and HCl, rinse and filter the coal sample with deionized water until the filtrate is medium sex. Subsequently, the coal sample washed with HCl was mixed with 7.6 mol / L HF at a ratio of 1 g / 10 mL, and the above operation was repeated. The obtained demineralized coal was dried in an oven and re...

Embodiment 2

[0052] Example 2: Gasification experiment of deashed Ximeng coal.

[0053] According to the method of Example 1, the original coal sample of Ximeng was obtained by the quartering method (the coal type is a kind of lignite rich in vitrinite in Xilingol League, Inner Mongolia, and its ash composition is characterized by high clay minerals (>50%) ), after crushing, grinding, and sieving, coal samples with a particle size of less than 0.178mm were selected for experimentation. Deashed Ximeng coal (XMD) was prepared by acid washing and deashing, and then deashed Ximeng coal (1%Ca-0.5%Na-XMD) loaded with calcium and sodium was prepared by impregnation method (deashed Ximeng coal and calcium carbonate And the mass ratio of sodium carbonate is 100:2.5:1).

[0054] The gasification reactivity test of the deashed Ximeng coal loaded with calcium and sodium was also carried out on a multifunctional comprehensive thermal analyzer NETZSCHSTA 449 F3. The gasification experiment process and ...

Embodiment 3

[0058] Example 3: Gasification experiment of Ximeng raw coal.

[0059] The Ximeng raw coal with a particle size of less than 0.178mm in Example 2 is not subjected to deashing treatment, and directly adopts the impregnation method to make Ximeng coal (1%Ca-0.5%Na-XM) loaded with calcium and sodium (Ximeng coal and calcium carbonate And the mass ratio of sodium carbonate is 100:2.5:1). The gasification reactivity test was carried out on a multifunctional comprehensive thermal analyzer NETZSCH STA 449 F3. The gasification experiment process and the selected gasification agent ratio were the same as in Example 1, and the selected gasification temperature was 800°C.

[0060] Also calculate the carbon conversion rate and the average specific gasification reaction rate, and compare the strength of the synergistic effect produced by the gasification reaction between coal char and multiple gasification agents. The results are as follows Figure 4 with table 3.

[0061]

[0062] Th...

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Abstract

The invention discloses a method for improving gasifying reactivity of coke in a catalytic coal gasification reaction process. According to the method, calcium carbonate and sodium carbonate are added into raw coal and are loaded by the raw coal, and calcium-sodium-loaded coal containing 1.25%-2.5% of calcium carbonate and 0.4%-1% of sodium carbonate is prepared. By carrying out gasification reaction by virtue of the calcium-sodium-loaded coal and an H2O / CO2 polybasic gasifying agent, the gasifying reactivity far better than pure H2O or pure CO2 is presented, the gasifying reactivity of the polybasic gasifying agent for the coke in a crushed coal pressure gasification process is improved, and the synergistic effect degree of the gasification reaction at a relatively high temperature is increased.

Description

technical field [0001] The invention belongs to the technical field of catalytic gasification of coal, and relates to a multi-element gasification agent pulverized coal pressurized gasification process, in particular to improving multi-element gasification agent and coal coke gasification in the multi-element gasification agent crushed coal pressurized gasification process method of reaction rate. Background technique [0002] Coal gasification is the leader of clean coal transformation and one of the important ways to develop modern coal chemical technology. At present, coal-to-synthetic natural gas has become a new generation of coal chemical project that is prioritized in my country, and the key to coal-to-natural gas is the choice of coal gasification technology. [0003] Compared with the entrained bed gasification technology and the moving bed pressurized liquid slagging gasification technology, the moving bed pressurized solid ash gasification technology has low inve...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10J3/00
CPCC10J3/00C10J2300/0986C10J2300/0996
Inventor 闫伦靖高美琪吕鹏杨志荣李凡白永辉朱生华
Owner TAIYUAN UNIV OF TECH
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