Zero-emission method for preparing olefin from coal

A coal-to-olefin, zero-emission technology, applied in chemical instruments and methods, preparation of hydroxyl compounds, preparation of organic compounds, etc., can solve the problems of insufficient utilization of C resources, large emissions, and inability to achieve efficient utilization of synthesis gas, etc. Achieve the effect of avoiding greenhouse gas emissions, reducing carbon emissions, and achieving diversification

Pending Publication Date: 2022-07-29
CHINA ENERGY GRP NINGXIA COAL IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to overcome the inability to realize efficient utilization of synthesis gas in the process of coal-to-olefins existing in the prior art, and the CO produced in the process 2 Large emissions, insufficient utilization of C resources, etc., provide a zero-emission coal-to-olefins method, which has the advantages of simple process, low cost, and low CO 2 The advantages of a high degree of comprehensive utilization and basically zero emissions

Method used

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  • Zero-emission method for preparing olefin from coal

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0070] refer to figure 1 The process flow in , using bituminous coal as raw material, carries out the cascade production of high-carbon olefins and low-carbon olefins:

[0071] (1) Preparation and purification of pure syngas

[0072] Pass oxygen into bituminous coal to obtain crude gas through pulverized coal pressurized gasification technology (gasification pressure 4.5MPa, gasification temperature 1200°C), and the composition of the volume percentage of crude gas is CO:H 2 :CO 2 :CH 4 :H 2 S=48.29:24.31:14.26:12.96:0.18, 67% by volume of crude gas was subjected to sulfur-tolerant shift under the catalysis of Qingdao Lianxin QDB-04 catalyst at 250°C, 3.5MPa, and the volumetric air velocity calculated with dry gas was 4000h -1 , the transformed water / gas molar ratio is 0.35, and the transformed crude gas is mixed with another 33% untransformed crude gas by volume and sent to the low-temperature methanol washing unit.

[0073] After the crude gas enters the low-temperatur...

Embodiment 2

[0083] refer to figure 1 The process flow in , using bituminous coal as raw material, carries out the cascade production of high-carbon olefins and low-carbon olefins:

[0084] (1) Preparation and purification of pure syngas

[0085] Using bituminous coal as raw material, feeding oxygen through pulverized coal pressurized gasification technology (gasification pressure 4.5MPa, gasification temperature 1200 ℃) to obtain crude gas, the composition of the volume percentage of crude gas is CO:H 2 :CO 2 :CH 4 :H 2 S=48.29:24.31:14.26:12.96:0.18, the crude gas is subjected to sulfur-tolerant shift at 250℃, 3.5MPa, Qingdao Lianxin QDB-04 catalyst, and the volume space velocity calculated by dry gas is 4000h -1 , the transformed water / gas molar ratio is 0.35, mixed with another 33% untransformed crude gas and sent to the low temperature methanol washing unit.

[0086] The mixed crude gas enters the low-temperature methanol washing unit, and is washed with low-temperature methanol ...

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Abstract

The invention relates to the technical field of coal processing and conversion, and discloses a zero-emission method for preparing olefin from coal. According to the method provided by the invention, by-products and CO2 in the production process are reformed by introducing a reforming treatment step, so that the CO2 generated in the process of preparing high-carbon (olefin) hydrocarbon from coal is comprehensively utilized, the diversification of products prepared from synthesis gas is realized, and the technical route of coal-based clean energy chemical industry is expanded. Meanwhile, the method also has the advantages that the process flow is simple, all components in the coal gas are fully utilized, the emission of greenhouse gases is reduced and the like, and coordinated development of economy, environment and energy is realized.

Description

technical field [0001] The invention relates to the technical field of coal processing and conversion, in particular to a zero-emission coal-to-olefin method. Background technique [0002] As an important organic raw material, high-carbon alpha-olefins have a wide range of applications due to the high added value of products, and the advantages of reducing hazards, easy transportation and storage, etc., so the technical development value of high-carbon alpha-olefins is high. In recent years, with the rapid development of my country's synthetic resin industry, the production capacity of hexene-1 and octene-1 is obviously insufficient. Therefore, the development of high-carbon alpha-energy olefins has become an important research direction in my country's petrochemical industry. There are many production methods of high carbon alpha hydrocarbon olefins, mainly including wax cracking process, fatty alcohol dehydrogenation process, ethylene oligomerization process, alkane cataly...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C29/151C07C31/04C01B3/38
CPCC07C29/1518C01B3/38C01B2203/0238C07C31/04
Inventor 江永军蒙延斐苏慧颜蜀雋金政伟张安贵井云环赵娜娜王伏
Owner CHINA ENERGY GRP NINGXIA COAL IND CO LTD
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