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Loading method of catalyst as well as coal catalytic gasification method

A catalyst and coal gasification technology, which is applied in gasification catalysts, production of combustible gas, petroleum industry, etc., can solve the problems of insufficient catalytic effect of catalysts, low gasification efficiency of gasification process, and low effective loading of catalysts, etc. To achieve the effect of increasing the effective load, improving the catalytic effect, and promoting dissociation

Active Publication Date: 2018-11-06
ENN SCI & TECH DEV
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Problems solved by technology

[0003] Catalyst loading is the first step in the catalytic gasification process. In the previous loading process, the catalyst is usually dissolved in water, and then the catalyst aqueous solution is mixed with the coal gasification raw material, and the excess water is dried and evaporated to complete the catalyst loading. In this process, the alkali The physical mixing between the metal or alkaline earth metal catalyst and the coal gasification raw material mainly occurs, which makes the effective load of the catalyst low, which is not conducive to the migration of the catalyst in the coal gasification reaction, which causes the catalytic effect of the catalyst to not be exerted and leads to gasification Process gasification efficiency is low

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  • Loading method of catalyst as well as coal catalytic gasification method

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Effect test

Embodiment 1

[0058] Mechanically mix lignite above 40 mesh and 200 mesh sodium carbonate at a mass ratio of 10:1 and put them into the reactor, add 5% water to the coal to make the surface of the coal particles wet and dissolve the catalyst Exothermic, after the coal and catalyst temperature drops to room temperature, add water with the same volume as the coal and catalyst mixture into the reactor. Heating the temperature and increasing the pressure, under the conditions of temperature 200°C and pressure 2MPa, react for 5h, and then pass a mixture of oxygen and carbon dioxide into the reaction system (the ratio of oxygen to carbon dioxide is 1:1), in which the concentration of oxygen is controlled. The molar ratio of the total feeding amount to the carbon in coal is 3:1, the total feeding amount of carbon dioxide and the molar ratio of carbon in coal is 2:1, the pH value of the mixed solution is 7.0 after 1 hour of feeding time, and the reaction is stopped. The catalyst-loaded coal sample ...

Embodiment 2

[0060] Mechanically mix highly metamorphic bituminous coal above 80 mesh and potassium carbonate of 300 mesh at a mass ratio of 3:1 and put it into the reaction kettle, add water with 8% of the coal mass to it, so that the surface of the coal particles is wetted and dissolved The catalyst releases heat. After the temperature of the coal and the catalyst drops to room temperature, the volume of water added to the reactor is twice the volume of the mixture of coal and catalyst. Heating and raising the pressure, under the conditions of temperature 300°C and pressure 3MPa, react for 2 hours, and then introduce a mixture of oxygen, carbon dioxide and nitrogen (the ratio of oxygen, carbon dioxide and nitrogen is 1:1:1), in which oxygen is controlled The molar ratio of the total feeding amount of carbon dioxide to the carbon in the coal is 5:1, and the molar ratio of the total feeding amount of carbon dioxide to the carbon in the coal is 4:1. After 2.5 hours of feeding, the pH value o...

Embodiment 3

[0062] Mechanically mix the sub-bituminous coal above 120 mesh and 200 mesh calcium oxide at a mass ratio of 5:1 and put it into the reaction kettle, add water with 7% of the coal mass to it to make the surface of the coal particles wet and dissolve the catalyst to release heat After the temperature of the coal and the catalyst drops to room temperature, add water with the same volume as the mixture of the coal and the catalyst into the reactor. Simultaneously add the sodium hydroxide that quality is 15% of coal amount and be used for improving solution alkalinity. Heating and raising the pressure, the temperature is 300°C, and the pressure is 1.0MPa, and the reaction is 3 hours, and then the mixture of oxygen, carbon dioxide and nitrogen (the ratio of oxygen, carbon dioxide and nitrogen is 1:2:2), in which the oxygen content is controlled. The molar ratio of the total feeding amount to the carbon in the coal is 4:1, and the molar ratio of the total feeding amount of carbon di...

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Abstract

The invention relates to the technical field of coal catalytic gasification, in particular to a loading method of a catalyst as well as a coal catalytic gasification method. The effective loading quantity of the catalyst can be improved and the catalytic effect of the catalyst can be improved, so that the coal gasification conversion efficiency can be improved. The embodiment of the invention provides the loading method of the catalyst. The loading method comprises the following steps: mixing a coal gasification raw material with the catalyst, wherein the coal gasification raw material is coalpowder or coke; performing heat treatment on a mixture of the coal gasification raw material and the catalyst, to dissociate alkali metal ions and / or alkaline earth metal ions out of the catalyst, and carry out an ion exchange reaction with active hydrogen in the coal gasification raw material, so that the catalyst is loaded. The embodiment of the invention is applied to preparation of methane through coal gasification.

Description

technical field [0001] The invention relates to the technical field of coal catalytic gasification, in particular to a catalyst loading method and a coal catalytic gasification method. Background technique [0002] Coal catalytic gasification is a process in which alkali metal or alkaline earth metal catalysts are supported on the surface of coal gasification raw materials to generate methane-rich gas and tar under a certain pressure and temperature (600-800°C). [0003] Catalyst loading is the first step in the catalytic gasification process. In the previous loading process, the catalyst is usually dissolved in water, and then the catalyst aqueous solution is mixed with the coal gasification raw material, and the excess water is dried and evaporated to complete the catalyst loading. In this process, the alkali The physical mixing between the metal or alkaline earth metal catalyst and the coal gasification raw material mainly occurs, which makes the effective load of the cat...

Claims

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Application Information

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IPC IPC(8): C10J3/00
CPCC10J3/00C10J2200/06
Inventor 祖静茹李克忠刘雷杨瑛
Owner ENN SCI & TECH DEV
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