Calcium-based compound catalyst and loading method thereof

A composite catalyst, calcium-based technology, applied in chemical instruments and methods, physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, etc., can solve the problems of low reaction activity and low methane content

Active Publication Date: 2015-03-11
ENN SCI & TECH DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, despite this, the existing calcium-based catalysts cannot completely replace the potassium-based catalysts and are generally used in the coal catalytic gasification process, because the existing calcium-based catalysts have low methanation reaction activity, which is not required for the gasification process. It is not feasible for a catalytic gasification process that realizes the coupling of gasification, shift, and methanation reactions within the coal gasification process to achieve heat balance, which usually results in very low methane content in the product gas of the coal gasification process

Method used

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  • Calcium-based compound catalyst and loading method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0111](1) Raw materials: lignite is used as coal particles and crushed to less than 1mm; the calcium-containing substance is Ca(NO 3 ) 2 , Ca(AC) 2 At least one of them, based on the quality of coal particles, the loading of calcium in the calcium-containing substance is 3%; the iron-containing substance is Fe(NO 3 ) 2 、Fe(AC) 2 At least one of them, the loading of iron element in the iron-containing substance is 1%; the nickel-containing substance is Ni(NO 3 ) 2 、Ni(AC) 2 At least one of them, the loading amount of nickel element in the nickel-containing substance is 1%.

[0112] (2) Loading method: Any one of the following methods can be used to load the catalyst:

[0113] a) Mix calcium-containing substances and coal particles evenly, add water and stir, impregnate, then mix iron-containing substances or nickel-containing substances with coal particles loaded with calcium-containing substances, add water and stir, and impregnate; add water, stir and impregnate, in or...

Embodiment 2

[0118] (1) Raw materials: Coal particles are blended with lignite, sub-bituminous coal, bituminous coal or anthracite, crushed to less than 1mm; calcium-containing substances are CaO, Ca(OH) 2 , Ca(AC) 2 , Ca(NO 3 ) 2 At least one of them, based on the mass of coal particles, the loading of calcium in the calcium-containing substances is 4.5%, and the iron-containing substances are FeO, Fe 2 o 3 , Fe 3 o 4 At least one of them, the loading of iron element in the iron-containing substance is 0.5%; or the nickel-containing substance is NiO, the loading of nickel element in the nickel-containing substance is 0.5%, and the iron-containing substance and the nickel-containing substance are pre-broken to 0.1mm the following.

[0119] (2) Loading method: the catalyst comprising calcium-containing substance and iron-containing substance, i.e. Ca-Fe catalyst, and the catalyst comprising calcium-containing substance and nickel-containing substance, i.e. Ca-Ni catalyst, are loaded a...

Embodiment 3

[0125] (1) Raw materials: lignite is used as coal particles, crushed to less than 1mm; calcium-containing substances and iron-containing substances or nickel-containing substances are precipitated and reacted to form other products. Among them, calcium-containing substances can be selected from CaO, Ca(OH) 2 , CaSO 4 , Ca(AC) 2 , Ca(NO 3 ) 2 At least one of them, based on the quality of coal particles, the load of calcium in the calcium-containing material is 3.5%; the iron-containing material can be selected from Fe(NO 3 ) 2 、Fe(AC) 2 、FeCO 3 , FeSO 4 At least one of them, the loading of iron element in the iron-containing substance is 1.3%, and the nickel-containing substance can be selected from Ni(NO 3 ) 2 、Ni(AC) 2 、NiCO 3 、NiSO 4 In at least one of them, the loading amount of nickel element in the nickel-containing substance is 0.2%.

[0126] (2) Loading method: first mix calcium-containing substances with coal particles evenly, add water to stir, and impregn...

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Abstract

The invention provides a calcium-based compound catalyst and a loading method thereof and relates to the technical field of catalytic coal gasification. The calcium-based compound catalyst has higher catalytic efficiency in both gasification reaction and methanation reaction, can realize gasification, conversion and methanation reaction coupling in a gasification furnace, and improves the content of methane in product gas. The calcium-based compound catalyst disclosed by the invention comprises a calcium-containing substance and a transition metal-containing substance. The calcium-based compound catalyst and the loading method thereof, disclosed by the invention, are applicable to the catalytic coal gasification process.

Description

technical field [0001] The invention relates to the technical field of coal catalytic gasification, in particular to a calcium-based composite catalyst and a loading method thereof. Background technique [0002] Coal catalytic gasification technology is an important way to cleanly and efficiently utilize coal. In the process of coal catalytic gasification, potassium-based catalysts are usually used to catalyze the gasification reaction to generate the target product. However, since the potassium-based catalyst is very expensive, and its alkalinity is strong and easy to corrode, it often needs to be recovered and recycled through processes such as washing and digestion, and the recovery process consumes a lot of energy and water, that is, the cost of the potassium-based catalyst is relatively high. High, complex recycling process and other shortcomings. [0003] In order to overcome this shortcoming of potassium-based catalysts, technicians have gradually focused on calcium...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/78C07C9/04C07C1/04
Inventor 王会芳武恒郑岩李克忠
Owner ENN SCI & TECH DEV
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