Method for producing synthetic gas

A synthesis gas and product technology, applied in the direction of gas fuel, petroleum industry, fuel, etc., to achieve the effect of good thermal and chemical stability, easy operation and management, and single process

Active Publication Date: 2015-12-09
SEDIN ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At the same time, it solves the shortcomings of carbon supplementation or methane reforming for the production of chemical products using coke oven gas alone, and the need for hydrogen supplementation or water vapor shift for chemical products using coal-based gas alone, and realizes the comprehensive utilization of coal-based gas and coke oven gas.

Method used

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  • Method for producing synthetic gas

Examples

Experimental program
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Effect test

Embodiment 1

[0033] Embodiment 1: the coke oven gas (volume percentage composition is H that ramming coke oven produces 2: 53%, CH 4 : 26%, CO+CO 2 :15%, N 2 : 6%) and coal-to-gas produced by pressurized gasification of crushed coal (volume percentage composition is CO: 52%, H 2 : 23%, CO 2 : 14%, CH 4 : 11%, H 2 S: 0.2%) is sent into the gas cabinet according to the molar flow ratio of 5.0:1, and the gas volume composition is H 2 : 48.0%, CO: 14.5%, CO 2 :9.0%, CH 4 : 23.5%, N 2 : 4.8%, H 2 S: 0.033% raw material gas. The raw material gas is compressed and washed with methanol at a low temperature, and H is removed at a temperature of -42°C and a pressure of 4.0 MPa 2 S and CO 2 and other impurities to obtain H 2 S content is less than 0.1ppm, CO 2 Feed gas with a content of less than 20ppm, the removed H 2 S desulfurization recovery, CO removal 2 Air vent. The purified raw gas enters cryogenic separation and methane separation, and the methane is separated at a pressure ...

Embodiment 2

[0035] The coke oven gas produced by the top-loading coke oven (volume percentage composition is H 2 : 62%, CH 4 : 23%, CO+CO 2 :10%,N 2 : 5%) and coal-to-gas produced by pressurized gasification of crushed coal (volume percentage composition is CO: 59%, H 2 : 20%, CO 2 : 12%, CH 4 : 9%, H 2 S: 0.25%) is sent into the gas cabinet according to the molar flow ratio of 2.5:1, and the gas volume composition is H 2 : 50.0%, CO: 20.4%, CO 2 :7.0%, CH 4 : 19.0%, N 2 : 3.6%, H 2 S: 0.013% raw material gas, the raw material gas is purified by thermal alkali method after compression, and H is removed under the condition of pressure 2.0MPa and temperature 98°C 2 S and CO 2 and other impurities to obtain H 2 S content is less than 0.1ppm, CO 2 Feed gas with a content of less than 20ppm, the removed H 2 S desulfurization recovery, CO removal 2 Air vent. The purified raw material gas enters the cryogenic separation methane separation, and the methane is separated at a pressu...

Embodiment 3

[0037] The coke oven gas (volume percentage composition as H 2 : 58%, CH 4 : 27%, CO+CO 2 :11%,N 2 : 3%) and the coal-to-gas produced by Lurgi gasifier (volume percentage composition is CO: 51%, H 2 : 25%, CO 2 : 9%, CH 4 : 15%, H 2 S: 0.21%) is sent into the gas cabinet according to the molar flow ratio of 2.0:1, and the gas volume composition is H 2 : 47.0%, CO: 22.9%, CO 2 :5.1%, CH 4 : 23.0%, N 2 : 2.0%, H 2 S: 0.06% raw material gas, the raw material gas is compressed and washed with methanol at low temperature, and H is removed at a temperature of -50°C and a pressure of 5.1 MPa. 2 S and CO 2 and other impurities to obtain H 2 S content is less than 0.1ppm, CO 2 Feed gas with a content of less than 20ppm, the removed H 2 S desulfurization recovery, CO removal 2 Air vent. The purified crude raw material gas enters the cryogenic separation methane separation, and the methane is separated at a pressure of 5.2MPa and a temperature of -163°C to produce LNG (li...

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Abstract

A method for producing synthetic gas comprises: coke gas and coal based syngas are fed in the cabinet and fully mixed to make crude material gas where the mol rate of hydrogen and carbon is 1.0-5.0, which meets the requirement of downstream synthesis. The crude material gas is compressed, purified, then removed of H<2>S, CO<2>; the removed hydrogen sulfide is recovered after removing sulfur, and the removed carbon dioxide is evacuated. Purified crude material gas is separated from methane which is prepared for liquefied natural gas products or compressed natural gas, then the crude synthetic gas becomes purified synthetic gas meeting the hydrogen / carbon ratio of the requirement of downstream synthesis. The invention has advantages of comprehensive utilization of coke gas and coal based syngas.

Description

technical field [0001] The invention belongs to a method for producing synthesis gas. technical background [0002] Synthesis gas is a kind of raw material gas with carbon monoxide and hydrogen as the main components, which is used as a chemical raw material. Syngas is widely used and is the most basic raw material for synthetic ammonia, natural gas, methanol, ethylene glycol, light olefins, synthetic oil and other products. Syngas has a wide range of raw materials. It is produced by the gasification of carbonaceous minerals such as solid fuels such as coal and charcoal. It can also be produced from light hydrocarbons such as natural gas and naphtha. It can also be produced from heavy oil through partial oxidation. Syngas preparation technology is basically monopolized by large foreign companies such as Shell, Sasol, BASF, and Mobil. [0003] The composition (volume%) of syngas produced by various methods is very different: H 2 : 32~67, CO: 10~57, CO 2 : 2~28, CH 4 : 0....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10L3/08
Inventor 曹会博李晓崔晓曦马英民
Owner SEDIN ENG
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