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Method for adjusting coal catalytic pyrolysis gas-phase product by utilizing high-temperature coke oven gas

A technology of coal gas adjustment and coal catalysis, which is applied in the field of coal pyrolysis, can solve the problems of less research on product gas phase product composition, large coal pyrolysis heat demand, complex equipment structure, etc., so as to make full use of energy, reduce pyrolysis energy consumption, Economical effect

Inactive Publication Date: 2020-03-27
KAILUAN GRP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Based on the problems in the existing technology that it is difficult to utilize the sensible heat or part of the latent heat of high-temperature coke oven gas, while the heat demand for coal pyrolysis is large, and the research on the gas phase product composition of products is less, the present invention provides a method for using high-temperature coke oven gas to modulate coal catalytic pyrolysis The gas-phase product method not only realizes the energy-saving utilization of high-temperature coke oven gas, but also uses the hydrogen, methane, carbon monoxide and other reducing atmospheres in the coke oven gas to adjust the gas-phase products of coal pyrolysis, and realizes the heat quality of high-temperature coke oven gas at the same time Utilization solves the problem of expensive materials and complex equipment structure caused by the impact of impurity components when high-temperature coke oven gas is used for energy recovery alone

Method used

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  • Method for adjusting coal catalytic pyrolysis gas-phase product by utilizing high-temperature coke oven gas
  • Method for adjusting coal catalytic pyrolysis gas-phase product by utilizing high-temperature coke oven gas
  • Method for adjusting coal catalytic pyrolysis gas-phase product by utilizing high-temperature coke oven gas

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Experimental program
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Effect test

Embodiment 1

[0057] According to the mass of 10% coal sample, weigh and grind FeCl to 100-120 mesh 3 , mixed evenly with the coal sample, and the heating rate is 10°C / min; when the temperature reaches 500°C, the pressure is 1MPa, the temperature is 500°C coke oven gas, and the gas components are analyzed online by gas chromatography after pyrolysis for 30 minutes. H in gas components 2 The content of CH4 is 43.2%, and the content of CH4 is 21.1%. (Remarks, namely H 2 content decreased from 55% to 43.2%, CH 4 content from 35% to 21.1%. At this time, the content of methane is the lowest, and the ratio of hydrogen to methane is 2:1)

Embodiment 2

[0059] According to the mass of 10% coal sample, weigh and grind FeCl to 100-120 mesh 3 , mixed evenly with the coal sample, and the heating rate is 10°C / min; when the temperature reaches 800°C, the pressure is 1MPa, the temperature is 800°C coke oven gas, and the gas components are analyzed online by gas chromatography after pyrolysis for 30 minutes. H in gas components 2 The content is 33.7%, CH 4 The content is 32.2%. (Remarks, namely H 2 content decreased from 55% to 33.7%, CH 4 content from 35% to 32.2%. At this time, the hydrogen content is the lowest, and the ratio of hydrogen to methane is close to 1:1)

Embodiment 3

[0061] According to the mass of 10% coal sample, weigh and grind FeCl to 100-120 mesh 3 , mixed evenly with the coal sample, and the heating rate is 10°C / min; when the temperature reaches 500°C, the pressure is 3MPa, the temperature is 500°C coke oven gas, and the gas components are analyzed online by gas chromatography after pyrolysis for 30 minutes. H in gas components 2 The content is 48.3%, CH 4 The content is 26.8%.

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Abstract

The invention discloses a method for adjusting a coal catalytic pyrolysis gas-phase product by utilizing a high-temperature coke oven gas, and belongs to the field of coal pyrolysis. The method is characterized in that pulverized coal added with an iron-based catalyst is pyrolyzed under the pressure of 1-3 MPa at a temperature of 400-800 DEG C by using the 400-800 DEG C high-temperature coke ovengas, and the composition of a coal pyrolysis gas-phase product is adjusted by changing the reaction conditions such as pyrolysis time and the catalyst. When the hydrogen-carbon ratio of the raw material gas is 1.57, the carbon-hydrogen ratio of the gas-phase product can be adjusted to be 1.04-2.05, and the method can be realized under a plurality of different temperature and pressure conditions. Asimultaneous heat and mass utilization mode of the high-temperature coke oven gas is provided, and the yield and components of the pyrolysis gas-phase product can be adjusted according to downstreamrequirements and market conditions.

Description

technical field [0001] The invention belongs to the field of coal pyrolysis, and in particular relates to a method for modulating gas phase products of coal catalytic pyrolysis by utilizing high-temperature coke oven gas. Background technique [0002] In view of the fact that my country is relatively rich in coal and lacking in oil, using coal as the main energy source instead of petrochemical production and adjusting the structure of energy utilization is of great significance to alleviating the current oil energy crisis. Coal pyrolysis is a key step in coal conversion, and it is also the most economical and efficient technical method to convert solid energy into liquid or gaseous energy. How to improve the quality and yield of tar in the pyrolysis process has always been a hot spot in the research of pyrolysis technology. Liu Xuezhi and others studied the composition of coal pyrolysis tar under different pressures, and found that increasing the pyrolysis pressure can sign...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10B53/04C10B57/06C10B49/02
CPCC10B49/02C10B53/04C10B57/06
Inventor 李洪娟王志彦王力力罗明生王亚涛贾伟艺狄佐星吴洁
Owner KAILUAN GRP
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