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Method and device for coal-to-hydrogen co-production of methane

A technology for producing hydrogen and methane from coal, which is applied in chemical instruments and methods, hydrogen/synthesis gas production, hydrogen and other directions to achieve the effect of saving dehydration steps and equipment, saving energy consumption, and reducing temperature switching

Active Publication Date: 2022-04-19
CHNA ENERGY INVESTMENT CORP LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to solve the problem of how to co-produce methane from coal-to-hydrogen, and provide a method and device for coal-to-hydrogen to co-produce methane.

Method used

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  • Method and device for coal-to-hydrogen co-production of methane
  • Method and device for coal-to-hydrogen co-production of methane
  • Method and device for coal-to-hydrogen co-production of methane

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Effect test

Embodiment 1

[0089] according to figure 1 As shown in the flow chart, the synthesis gas from coal gasification (composition as above) is first subjected to sulfur-resistant methanation reaction and then to low-temperature shift reaction, and the product is subjected to acid gas removal and pressure swing adsorption;

[0090] Among them, the feed amount of synthesis gas entering the sulfur-tolerant methanation reaction is 20000Nm 3 / h, the sulfur-resistant methanation condition is: the sulfur-resistant methanation catalyst (percentage by weight) is 10%MoO 3 / 5%Y 2 o 3 / 100%ZrO 2 (monoclinic phase), the inlet temperature of the adiabatic fixed bed reactor is 300°C, the outlet temperature of the reactor is 520°C, water vapor: in the synthesis gas (CO+H 2 ) with a volume ratio of 0.4:1;

[0091] The low-temperature shift reaction conditions are: the reactor inlet temperature is 215°C, the reactor outlet temperature is 290°C, and a certain amount of water vapor is introduced to ensure that...

Embodiment 2

[0094] according to figure 2 In the flow chart shown, the synthesis gas from coal gasification (composition as above) is subjected to high-temperature shift reaction and sulfur-tolerant methanation reaction, then to low-temperature shift reaction, and finally to acid gas removal and pressure swing adsorption;

[0095] Among them, the feed amount of synthesis gas entering the high temperature exchange reaction is 20000Nm 3 / h,

[0096] The high-temperature shift reaction conditions are as follows: the reactor inlet temperature is 260°C, the reactor outlet temperature is 455°C, and a certain amount of water vapor is introduced to ensure that the water vapor: in the synthesis gas (CO+H 2 ) with a volume ratio of 0.1:1 and a sulfur-resistant catalyst of K8-11 to obtain a high-temperature shift reaction product;

[0097] The sulfur-resistant methanation conditions are: the sulfur-resistant methanation catalyst is 10% MoO 3 / 5%Y 2 o 3 / 100%ZrO 2 (monoclinic phase), the inlet ...

Embodiment 3

[0101] according to image 3 As shown in the flow chart, the synthesis gas (composition as above) from coal gasification is subjected to shift reaction and sulfur-tolerant methanation reaction, and acid gas removal and pressure swing adsorption are carried out;

[0102] Among them, the total amount of syngas from coal gasification is 20000Nm 3 / h; 50% by volume of synthesis gas enters the high-temperature exchange reaction, 50% by volume of synthesis gas enters into the sulfur-tolerant methanation reaction,

[0103] The high-temperature shift reaction conditions are as follows: the reactor inlet temperature is 260°C, the reactor outlet temperature is 455°C, and a certain amount of water vapor is introduced to ensure that the water vapor: in the synthesis gas (CO+H 2 ) with a volume ratio of 0.8:1 and a sulfur-resistant catalyst of K8-11 to obtain a high-temperature shift reaction product;

[0104] The sulfur-resistant methanation conditions are: the sulfur-resistant methanat...

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Abstract

The invention relates to the fields of coal-to-hydrogen and methane, and discloses a method and a device for coal-to-hydrogen co-production of methane. The method includes: (1) converting the synthesis gas obtained by coal gasification into a reaction product rich in hydrogen and methane through a coupled reaction process of a shift reaction and a sulfur-tolerant methanation reaction; (2) sequentially carrying out the reaction products Acid gas removal and pressure swing adsorption to obtain hydrogen and methane; wherein the shift reaction includes low temperature shift and optional high temperature shift. The coupling of coal-to-hydrogen and coal-to-methane can be realized with high energy efficiency.

Description

technical field [0001] The invention relates to the field of coal-to-hydrogen co-production of methane, in particular to a method and device for coal-to-hydrogen co-production of methane. Background technique [0002] Hydrogen is an energy carrier, which has the advantages of wide sources, light weight, high thermal efficiency, clean combustion and environmental protection. At present, the industrial large-scale hydrogen production method mainly uses methane, petroleum and coal as raw materials, and reacts them with water vapor or oxygen at high temperature to produce hydrogen. The above hydrogen production methods are relatively mature in technology. However, due to the characteristics of "rich in coal, short of oil, and low in gas" in my country's resource reserves, it does not have economic advantages in my country to exchange methane or petroleum as raw materials for hydrogen. Therefore, domestic large-scale hydrogen production mostly adopts coal-to-hydrogen technology...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C1/04C07C7/00C07C7/11C07C7/12C01B3/34C07C9/04
CPCC07C1/0455C07C1/0485C07C7/005C07C7/11C07C7/12C01B3/34C01B2203/062C07C2523/28C07C9/04
Inventor 秦绍东
Owner CHNA ENERGY INVESTMENT CORP LTD