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Device and method for complete methanation of synthesis gas

A complete methanation and synthesis gas technology, applied in the field of coal chemical industry, can solve the problems of catalyst wear and affecting the conversion rate of methanation reaction, etc., and achieve the effect of improving heat transfer capacity, reducing production cost and high conversion rate

Inactive Publication Date: 2013-08-21
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the back-mixing phenomenon in the fluidized bed, the conversion rate of the methanation reaction will be affected, and problems such as catalyst wear must also be considered. Therefore, the development of the complete methanation fluidized bed process is still in the laboratory stage and has not yet mature The complete methanation fluidized bed process can be used in industrial

Method used

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  • Device and method for complete methanation of synthesis gas

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] use as figure 1 The gas-solid-solid synthesis gas complete methanation device shown, the operation steps are as follows:

[0023] a. Using synthesis gas as raw material gas, the raw material gas and alumina microspheres are mixed in the mixer 1a, and after mixing, enter the gas-solid-solid reactor 2 equipped with a methanation catalyst, and in the gas-solid-solid Fully contact and react in Reactor 2; the molar ratio of hydrogen to carbon monoxide in the synthesis gas is 3.1, and the total volume flow rate is 5m 3 / h, the inlet temperature and outlet temperature of the gas-solid-solid reactor 2 are 370°C and 410°C respectively, and the operating pressure is 3.0MPa; the diameter of the catalyst particles is a cylinder with a diameter of φ5mm and a length of 3mm, and there are clover-shaped channel; the inner diameter of the gas-solid-solid reactor is 100mm, the height of the catalyst bed is 400mm; the particle size of alumina microspheres is 75 microns.

[0024] b, the ...

Embodiment 2

[0029] use as figure 1 The gas-solid-solid synthesis gas complete methanation device shown, the operation steps are as follows:

[0030] a. Using synthesis gas as the feed gas, mix the feed gas and quartz sand in the mixer 1a, after mixing, enter the gas-solid-solid reactor 2 equipped with a methanation catalyst, and in the gas-solid-solid reactor 2 for sufficient contact and reaction; the molar ratio of hydrogen to carbon monoxide in the synthesis gas is 3.5, and the total volume flow rate is 5m 3 / h, the inlet temperature and outlet temperature of the gas-solid-solid reactor 2 are 350°C and 390°C respectively, and the operating pressure is 3.0MPa; the diameter of the catalyst particles is a cylinder with a diameter of φ10mm and a length of 8mm, and there are clover-shaped channel; the inner diameter of the gas-solid-solid reactor is 100 mm, the height of the catalyst bed is 400 mm; the particle size of the quartz sand is 50 microns.

[0031] b, the gas-solid mixture coming...

Embodiment 3

[0036] use as figure 1 The gas-solid-solid synthesis gas complete methanation device shown, the operation steps are as follows:

[0037] a. Using synthesis gas as the feed gas, mix the feed gas and quartz sand in the mixer 1a, after mixing, enter the gas-solid-solid reactor 2 equipped with a methanation catalyst, and in the gas-solid-solid reactor 2 for sufficient contact and reaction; the molar ratio of hydrogen to carbon monoxide in the synthesis gas is 3.5, and the total volume flow rate is 5m 3 / h, the inlet temperature and outlet temperature of the gas-solid-solid reactor 2 are 350°C and 390°C respectively, and the operating pressure is 4.0MPa; the diameter of the catalyst particles is a cylinder with a diameter of φ10mm and a length of 6mm, and there are clover-shaped channel; the inner diameter of the gas-solid-solid reactor is 100 mm, the height of the catalyst bed is 400 mm; the particle size of the quartz sand is 75 microns.

[0038] b, the gas-solid mixture coming ...

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Abstract

The invention discloses a device and a method for complete methanation of synthesis gas, belonging to the technical field of coal chemical industry. The device consists of a mixer, a gas-solid-solid reactor, a cyclone separator, a heat recovery container, a first material seal and a second material seal. The method includes three main steps: complete methanation of synthesis gas consisting of feed gas carrying inert heat carrier particles, separation of product from the inert heat carrier particles, and recovering and recycling of the inert heat carrier particles, wherein the complete methanation of the synthesis gas consisting of the feed gas carrying the inert heat carrier particles can greatly reduce the reaction temperature, slow down the catalyst carbon deposit rate, and reduce the heat load of a material of a reactor, and the inert heat carrier particles are carried by reactant gas to pass through the reactor which can be continuously operated.

Description

technical field [0001] The invention belongs to the technical field of coal chemical industry, and in particular relates to a device and method for complete methanation of synthesis gas. Background technique [0002] Since the oil crisis in the 1970s triggered the world's major energy companies to devote themselves to the research of coal-to-synthetic natural gas, the methanation of syngas is a key part of the above process, the core of which is the research of methanation catalysts and processes. In 1984, Lurgi Company completed the development of a complete set of process technology for two-step complete methanation, and successfully applied it to the 1.2 billion standard cubic meters per year coal-to-synthetic natural gas plant in the Great Plains of the United States. The Lurgi complete methanation process includes: coal gasification to generate syngas, the syngas undergoes water vapor shift to adjust the molar ratio of hydrogen to carbon monoxide to an appropriate value...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C9/04C07C1/04
Inventor 程易储博钊翟绪丽
Owner TSINGHUA UNIV
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