Coal hydrogenation gasification method

A technology of coal hydrogenation gasification and hydrogen, which is applied in the field of coal gasification, can solve the problems of low yield of methane and light oil products, and achieve the effect of increasing the hydrogenation degree and yield

Inactive Publication Date: 2017-05-17
ENN SCI & TECH DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In view of this, the present invention proposes a coal hydrogasification method, aiming at solving the problem of low yields of methane and light oil products in coal gasification products by adopting the existing coal hydrogasification technology

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Effect test

Embodiment 1

[0038] Add a specific surface area of ​​160m to the catalyst chamber 2 / g, the pore volume is 0.3cm 3 / g, α-Al with a pore size of 4nm 2 o 3 Supported Ni-based catalysts (Ni accounted for α-Al 2 o 3 The weight fraction is 4wt%), and preheated to 450 ° C, hydrogen at 100Nm 3 The flow rate of / h is passed into the catalyst chamber to carry out catalytic activation reaction with the catalyst, wherein, the weight of the catalyst is 1kg, and the pressure of the catalytic activation reaction is 6MPa; Coal hydrogasification reaction, in which the time required for the activated hydrogen to be transported to the pulverized coal is 0.1ms, the weight ratio of hydrogen to pulverized coal is 0.3, and the product is half Coke and crude gas, the crude gas is separated, purified, washed and deoiled to obtain a synthesis gas with a methane content higher than 45% and a light oil product with a dry basis yield greater than 11%.

Embodiment 2

[0040] Add a specific surface area of ​​260m to the catalyst chamber 2 / g, the pore volume is 0.6cm 3 / g, α-Al with a pore size of 6nm 2 o 3 Supported Ni-based catalysts (Ni accounted for α-Al 2 o 3 The weight fraction is 11wt%), and preheated to 650 ° C, hydrogen at 460Nm 3 The flow rate of / h is passed into the catalyst chamber to carry out catalytic activation reaction with the catalyst, wherein, in the catalytic reaction, the weight of the catalyst is 0.58kg, and the pressure of the catalytic activation reaction is 6MPa; the activated hydrogen is passed into the gasifier , coal hydrogasification reaction with pulverized coal, in which the time required for the activated hydrogen to be transported to pulverized coal is 0.75ms, the weight ratio of hydrogen to pulverized coal is 0.4, and the reaction is carried out at a temperature of 600°C and a pressure of 6MPa After 4s, the product semi-coke and crude gas are obtained, and the crude gas is separated, purified, washed ...

Embodiment 3

[0042] Add a specific surface area of ​​350m to the catalyst chamber 2 / g, the pore volume is 0.9cm 3 / g, α-Al with a pore size of 9nm 2 o 3 Supported Ni-based catalysts (Ni accounted for α-Al 2 o 3 The weight fraction is 18wt%), and preheated to 850 ° C, hydrogen at 560Nm 3 The flow rate of / h is passed into the catalyst chamber to carry out catalytic activation reaction with the catalyst, wherein the weight of the catalyst is 0.7kg, and the pressure of the catalytic activation reaction is 7MPa; the activated hydrogen is passed into the gasifier, and the pulverized coal Coal hydrogasification reaction is carried out, in which the time required for the activated hydrogen to be transported to the pulverized coal is 1.5ms, the weight ratio of hydrogen to pulverized coal is 0.5, and the product is obtained after the reaction at a temperature of 700°C and a pressure of 7MPa for 6s Semi-coke and crude gas, the crude gas is separated, purified, washed and deoiled to obtain syng...

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Abstract

The invention provides a coal hydrogenation gasification method. The coal hydrogenation gasification method comprises the following steps: introducing hydrogen into a catalyst to be activated, and generating activated hydrogen; and mixing the activated hydrogen and coal powder to have a gasification reaction. According to the coal hydrogenation gasification method, by virtue of a way of catalytically activating the hydrogen, active hydrogen free radicals are provided for the coal hydrogenation gasification process, and the active hydrogen free radicals are promoted to have a coupling reaction with a coal primary pyrolysis product, so that the hydrogenation degree of the coal primary pyrolysis product can be increased, and the yield of methane and light-weight oil products in the coal hydrogenation gasification product can be increased.

Description

technical field [0001] The invention relates to the technical field of coal gasification, in particular to a coal hydrogenation gasification method. Background technique [0002] Coal hydrogasification is an efficient and clean coal gasification process. It generally refers to a series of physical and chemical changes between coal and hydrogen-containing gas under certain temperature and pressure conditions to generate gas methane, liquid oil and solid semi-coke. the process of. In the process of coal hydrogasification, hydrogen is activated into hydrogen radicals, and the coupling reaction between hydrogen radicals and coal primary pyrolysis products can increase the degree of hydrogenation of coal primary pyrolysis products and inhibit the polycondensation of coal primary pyrolysis products reaction, thereby increasing the methane yield and light oil yield of coal gasification products, and increasing the carbon conversion rate. [0003] In the existing coal hydrogenatio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G1/06C10L3/08
CPCC10G1/06C10L3/08
Inventor 汪国庆董婵郑征王蕾马丽荣聂永广
Owner ENN SCI & TECH DEV
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