Catalytic coal gasification catalyst and preparation method and application thereof

A coal catalytic gasification and catalyst technology, which is applied in the direction of physical/chemical process catalysts, chemical instruments and methods, fixed bed gasification, etc., can solve problems such as expensive catalysts, difficult catalyst recovery, and reactor material corrosion, and achieve faster The pace of industrial application, satisfying clean and efficient utilization, and the effect of strong interaction force

Inactive Publication Date: 2015-03-25
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are mainly the following categories: (1) metal oxides, metal hydroxides and salts mainly composed of alkali metals and alkaline earth metals, including NaOH, KOH, CaCO 3 、K 2 CO 3 、Na 2 CO 3 , CaO, etc.; (2) transition metals, mainly including iron, cobalt, nickel, etc., among which Ni shows better catalytic activity; (3) rare earth metals, mainly Ce(NO 3 ) 3 Considering the high price and low catalyst activity, so far the research on coal gasification using rare earth metals as catalysts has not aroused people's actual interest; (4) Minerals or ash in coal, no matter what kind of coal or More or less always contain a certain amount of minerals (Fuel,2000,79:427-438)
Among them, alkali metal carbonates, such as K 2 CO 3 , is currently recognized as an excellent catalyst, but the price of the catalyst is relatively expensive, which is 10,000 yuan/ton. At the same time, due to the existence of clay minerals in coal, K 2 CO 3 It reacts with clay minerals to form potassiu

Method used

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  • Catalytic coal gasification catalyst and preparation method and application thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Weigh 5.9 g of KCl, add 40 mL of deionized water, after completely dissolving, add 1.5 g of Zhundong coal into it, continue to stir to mix evenly, centrifuge, wash, dry, crush and sieve to 60 Mesh-100 mesh, the catalyst is marked as KCl-ZD.

[0021] Coal catalytic gasification reaction conditions: deionized water flow rate 1.0 mL / min, reaction temperature 973 K, reaction system pressure 3.4 MPa. The change curve of carbon conversion rate on the catalyst with time and CH 4 The accumulated precipitation amount is shown in Table 1.

Embodiment 2

[0023] Weigh 5.9 g of KCl and dissolve it in 40 mL of deionized water. After it is completely dissolved, add 1.5 g of Zhundong coal into it, continue stirring to mix evenly, measure 40 mL of ammonia water, and add it dropwise to the suspension , continue to stir until the pH value of the solution remains unchanged, centrifuge, wash, dry, crush and sieve to 60-100 mesh after tableting, and the catalyst is marked as KCl-1-ZD.

[0024] Coal catalytic gasification reaction conditions: deionized water flow rate 1.0 mL / min, reaction temperature 973 K, reaction system pressure 3.4 MPa. The change curve of carbon conversion rate on the catalyst with time and CH 4 The accumulated precipitation amount is shown in Table 1.

Embodiment 3

[0026] Weigh 5.9 g of KCl and dissolve it in 40 mL of deionized water. After it is completely dissolved, add 1.5 g of Zhundong coal into it, continue stirring to mix evenly, measure 60 mL of ammonia water, and add it dropwise to the suspension , continue to stir until the pH value of the solution remains unchanged, centrifuge, wash, dry, crush and sieve to 60-100 mesh after tableting, and the catalyst is marked as KCl-2-ZD.

[0027] Coal catalytic gasification reaction conditions: deionized water flow rate 1.0 mL / min, reaction temperature 973 K, reaction system pressure 3.4 MPa. The change curve of carbon conversion rate on the catalyst with time and CH 4 The accumulated precipitation amount is shown in Table 1.

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Abstract

The invention belongs to the technical field of catalytic coal gasification catalysts and provides a high-efficiency catalytic coal gasification catalyst prepared from a low-price halide ion metal salt and application thereof. According to the catalyst, the low-price halide ion metal salt serves as a precursor of the catalyst, a pH value regulator is adopted, active metal components are uniformly loaded on a coal base by virtue of an ion exchange technology, the active components are dispersed at an atomic scale, and corrosion of the halide ions to the reactor material is avoided. The catalyst prepared by the invention is applied to a fixed bed reactor for preparing natural gas by virtue of mild catalytic coal gasification, so that the conversion rate of converting the coal into gaseous products can be effectively improved, the composition of the coal gas can be changed, the content of methane is improved, and the coal utilization rate is greatly improved.

Description

technical field [0001] The invention relates to a catalyst, its preparation method and application, in particular to a catalyst for coal catalytic gasification, its preparation method and application. Background technique [0002] Coal gasification, as one of the important means of coal processing and conversion, has been paid more and more attention by people. This is because coal gasification can provide syngas and substitute natural gas. If low-quality coal such as high-ash coal and pulverized coal can be used for gasification, it will be of great significance to protect the environment and reduce costs. As a mild gasification technology, the catalytic gasification of coal has always been an interesting research topic. The key is the choice of catalyst. The coal catalytic gasification catalysts that have been studied so far include almost the entire metal elements of the periodic table. There are mainly the following categories: (1) metal oxides, metal hydroxides and ...

Claims

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Application Information

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IPC IPC(8): B01J27/08B01J27/10B01J27/138B01J27/128B01J27/12C10J3/02
CPCY02P20/52
Inventor 侯红美刘俊吕锋李海涛邱爱玲
Owner CHINA PETROLEUM & CHEM CORP
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