Novel process for synthesizing natural gas by methanation of coal gasification syngas

A chemical synthesis and natural gas technology, applied in the petroleum industry, gas fuel, fuel, etc., can solve the problems of harsh process conditions, low energy utilization rate, high production cost, etc., achieve low equipment cost, high conversion rate of raw material gas, and reduce use volume effect

Inactive Publication Date: 2013-06-19
CHINA UNIV OF MINING & TECH (BEIJING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The purpose of the present invention is to overcome the problems of low energy utilization rate, large equipment investment, high production cost and harsh process conditions in the existing process for producing methane from syngas, thereby providing a low energy consumption, easy operation and low equipment cost , suitable for a wide range of CO or CO 2 Methane production process of synthesis gas in concentration range

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Grind the catalyst to below 200 mesh, first put 300ml of paraffin or heat conduction oil in a 500ml autoclave, put in the ground Al 2 o 3 Ni catalyst as a carrier, first pass nitrogen gas and press to raise the temperature to 300 °C, after 2MPa, pass H 2 H / CO≥3:1 2 and CO gas, start to record the temperature change, and start to detect the tail gas after 1 hour of reaction. During the reaction, the temperature fluctuated in the range of 300–302 °C, and the CO conversion reached 98%.

[0027] Comparative test: Since the catalyst that is too fine will block the fixed bed layer, the catalyst is pressed into small balls and put into the fixed bed reactor. First, nitrogen gas is introduced to press and the temperature is raised to 300°C. After 2MPa, H 2 H / CO≥3:1 2 and CO gas, start to record the temperature change, and start to detect the tail gas after 1 hour of reaction. During the reaction, the temperature increased by 5 °C, and the CO conversion reached 97%.

Embodiment 2

[0029] Grind the catalyst to below 200 mesh, first put 300ml of paraffin or heat transfer oil in a 500ml autoclave, put the ground SiO 2 Ni catalyst as a carrier, first pass nitrogen gas and press to raise the temperature to 300 °C, after 2MPa, pass H 2 H / CO≥3:1 2 and CO gas, start to record the temperature change, and start to detect the tail gas after 1 hour of reaction. During the reaction, the temperature fluctuated in the range of 299–302 °C, and the CO conversion reached 97%.

[0030] Comparative test: SiO 2 The Ni catalyst as the carrier is pressed into small balls and placed in a fixed bed reactor. First, nitrogen gas is introduced to press and the temperature is raised to 300 ° C. After 2 MPa, H 2 H / CO≥3:1 2 and CO gas, start to record the temperature change, and start to detect the tail gas after 1 hour of reaction. During the reaction, the temperature fluctuated in the range of 300–305 °C, and the CO conversion reached 98%.

Embodiment 3

[0032] Grind the catalyst to below 200 mesh, put 300ml of paraffin or heat conduction oil in a 500ml autoclave first, put in the ground after using La as additive, Al 2 o 3 Ni catalyst as a carrier, first pass nitrogen gas and press to raise the temperature to 300 °C, after 2MPa, pass H 2 / C≥4:1H 2 And mixed gas containing C (CO, CO 2 ), began to record the temperature change, and started to detect the tail gas after 1 hour of reaction. During the reaction, the temperature fluctuated in the range of 298-301 °C, and the carbon conversion reached 96%.

[0033] Comparative test: La will be used as auxiliary agent, Al 2 o 3 The Ni catalyst as the carrier is pressed into small balls and placed in a fixed bed reactor. First, nitrogen gas is introduced to press and the temperature is raised to 300 ° C. After 2 MPa, H 2 / C≥4:1H 2 And mixed gas containing C (CO, CO 2 ), began to record the temperature change, and started to detect the tail gas after 1 hour of reaction. During th...

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PUM

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Abstract

The invention provides a novel process for synthesizing a natural gas by methanation of a coal gasification syngas. According to the novel process, a methanation catalyst is uniformly distributed in an inert liquid hydrocarbon, in a methanation reaction process by using the coal gasification syngas or a coke-oven gas as a feed gas. The process overcomes the problems of low energy utilization, large equipment investment, high production cost and harsh process conditions in a conventional process for producing methane by using syngas, and has the advantages of low energy consumption, easy operation and low cost of the equipment, and is suitable for preparing methane by using syngas with a large concentration range of CO or CO2.

Description

technical field [0001] The invention relates to a new process of coal gasification synthesis gas methanation synthesis natural gas, which is a high CO or CO 2 A new slurry bed methanation process with volume concentration of feed gas and low energy consumption. Background technique [0002] At present, the use of coke oven gas or coal gasification synthesis gas to produce alternative natural gas has recently received widespread attention. From coal gasification synthesis gas or coke oven gas, the H 2 , CO, CO 2 Carrying out methanation reaction can produce artificial natural gas, and the reaction formula is as follows: [0003] CO+3H 2 =CH 4 +H 2 O +206KJ / mol (1) [0004] CO 2 +4H 2 =CH 4 +2H 2 O +165KJ / mol (2) [0005] A strong exothermic reaction under the action of a catalyst during the methanation reaction. In the usual gas composition, every 1% of CO methanation can produce 74 °C adiabatic temperature rise; every 1% of CO 2 Methanation can produce an adiab...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10L3/08
Inventor 王永刚许德平贺龙袁振公维博赵红涛杨芳芳杨双凤陈思
Owner CHINA UNIV OF MINING & TECH (BEIJING)
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