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Catalyst for coal gasification, preparation method and application thereof

A coal gasification and catalyst technology, applied in the direction of physical/chemical process catalysts, chemical instruments and methods, organic compounds/hydrides/coordination complex catalysts, etc., can solve the corrosion of reactor metal components, difficulty in catalyst recovery, and affect the reaction issues such as device life, to achieve the effect of improving efficiency

Inactive Publication Date: 2017-04-19
TAIYUAN UNIV OF TECH
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Problems solved by technology

The main problem of coal catalytic gasification is: due to the clay minerals in coal (mainly silicon / aluminate) and the potassium salt catalyst in the catalyst form potassium aluminum silicate, resulting in catalyst deactivation, while potassium aluminosilicate It is insoluble in water, it is difficult to recover the catalyst completely, and it is difficult to recycle. In addition, the addition of alkali metals will corrode the metal components of the reactor, which seriously affects the life of the reactor.
The combination of these factors leads to the lack of commercial competitiveness of coal catalytic gasification technology due to high cost

Method used

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  • Catalyst for coal gasification, preparation method and application thereof

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Embodiment 1

[0038] In this embodiment 1, except that hydrofluoric acid is used to carry out the acid elution demineralization treatment step on the Jincheng low-quality coal, the rest of the steps are the same as the comparative example 1. The acid-eluting demineralization treatment step is: using 5% (wt.%) hydrofluoric acid solution to pickle and demineralize the coal, at a ratio of 10g coal: 250ml hydrofluoric acid solution, at 60°C, Stir for 30 minutes, filter and wash with deionized water until the filtrate is neutral, and then dry in an oven at 105°C; after acid elution, the mineral content in the coal is reduced to 12.4wt%.

[0039] The demineralized coal and rice straw are mixed and contacted at a mass ratio of 1:1, and then heated under 800° C. 2 A total of 30 minutes of pyrolysis under the atmosphere. The co-pyrolysis product is repeatedly sieved, and the generated coal char and biomass char are separated to obtain the catalyst for coal gasification of the present invention. Th...

Embodiment 2

[0042] In Example 2, except that hydrofluoric acid was used to carry out the acid elution demineralization treatment step on the Jincheng inferior coal, the rest of the steps were the same as those in Comparative Example 1. The acid-eluting demineralization treatment step is: using 20% ​​(wt.%) hydrofluoric acid solution to pickle and demineralize the coal, at a ratio of 10g coal: 250ml hydrofluoric acid solution, at 60°C, Stir for 30 min, filter and wash with deionized water until the filtrate is neutral, and then dry in an oven at 105°C. After acid leaching mineral treatment, the mineral content in the coal was reduced to 4.5wt%.

[0043] The above-mentioned demineralized coal and rice straw were mixed and contacted at a mass ratio of 1:1, and then heated under 800°C N 2 A total of 30 minutes of pyrolysis under the atmosphere. The co-pyrolysis product is repeatedly sieved, and the generated coal char and biomass char are separated to obtain the catalyst for coal gasificati...

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Abstract

The invention relates to a catalyst for coal gasification, a preparation method and application thereof. The preparation method of the catalyst for coal gasification comprises the step of carrying out co-pyrolysis on feed coal and biomass rich in alkali metal K and Na. The invention provides a preparation method of the catalyst for coal gasification. The preparation method has simple process, is low-cost, and is green and environment-friendly. In addition, technical problems in the prior art, such as alkali metal recovery, recycling and cost, which restrain the catalytic coal gasification process, are solved.

Description

technical field [0001] The invention relates to a catalyst for coal gasification, a preparation method of the catalyst for coal gasification, and an application of using the catalyst for coal gasification to carry out coal gasification reaction. Background technique [0002] Due to the obvious shortcomings and deficiencies of the traditional first generation and the second generation of coal gasification technology, which is currently widely used in industrialization, such as high reaction temperature, difficult purification, high energy consumption, relatively large equipment investment, and serious environmental pollution, etc., these These factors have directly promoted the research on the third-generation coal gasification technology represented by coal catalytic gasification. Catalytic gasification of coal refers to the better contact between coal particles and gasification agent under the action of catalysts such as alkali / alkaline earth metals, which can promote the o...

Claims

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Application Information

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IPC IPC(8): B01J31/26C10B53/02C10B57/04C10J3/00
CPCB01J31/26C10B53/02C10B57/04C10J3/00C10J2300/0986Y02E50/10Y02P20/145Y02P20/52
Inventor 宋云彩樊文俊朱绒冯杰李文英
Owner TAIYUAN UNIV OF TECH
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