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Coke-oven gas methanation catalyst and preparation method thereof

A technology of gas methane and catalyst, which is applied in the field of oxide catalyst in methanation reaction and its preparation, which can solve the problems of increased bed resistance, device inoperability, and large reaction temperature rise, etc., and achieves improved carbon resistance, good Low temperature activity and good carbon resistance

Active Publication Date: 2009-03-25
SOUTHWEST RES & DESIGN INST OF CHEM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] For coke oven gas, based on coke oven gas composition (100%, volume percentage), every 1% of CO is converted into methane, and the adiabatic temperature rise of the gas is about 63°C; every 1% of CO 2 Converted to methane, the gas adiabatic temperature rises by about 50.5°C; therefore, the coke oven gas methanation reaction temperature rise is relatively large; and the coke oven gas methanation process is accompanied by reactions (4) and (5), so it will cause carbon precipitation in the system, and the generated Carbon deposition on the surface of the catalyst will cause catalyst deactivation and increase bed resistance, making the device unable to operate

Method used

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  • Coke-oven gas methanation catalyst and preparation method thereof
  • Coke-oven gas methanation catalyst and preparation method thereof
  • Coke-oven gas methanation catalyst and preparation method thereof

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Embodiment 1

[0034] The coke oven gas methanation catalyst in this embodiment mainly includes a carrier, an active material and an auxiliary agent, etc., wherein:

[0035] Take Al 2 o 3 As the carrier, nickel is the main active component (nickel exists in the catalyst in the form of NiO), and MgO is the auxiliary agent; the carrier Al 2 o 3 The support structure of magnesium aluminum spinel is formed with the auxiliary agent MgO; the content of NiO is 20%, Al 2 o 3 The content of MgO is 70%, and the content of MgO is 10%.

[0036] The coke oven gas methanation catalyst of this embodiment is prepared by a method comprising the following main steps:

[0037] (1), high-temperature calcination is obtained carrier: the Al of industrial raw material 2 o 3 with MgO(Al 2 o 3 The mass ratio of MgO and MgO is 7:1) and mixed in a ball mill, and the grinding time is 2 hours; the material after ball milling is pre-pressed and granulated, and pressed into a columnar carrier green body with a pr...

Embodiment 2

[0044] The coke oven gas methanation catalyst in this embodiment mainly includes a carrier, an active material and an auxiliary agent, etc., wherein:

[0045] Take Al 2 o 3 As the carrier, nickel is the main active component (nickel exists in the catalyst in the form of NiO), and MgO is the auxiliary agent; the carrier Al 2 o 3 The support structure of magnesium aluminum spinel is formed with the auxiliary agent MgO; the content of NiO is 12%, Al 2 o 3 The content of MgO is 50%, and the content of MgO is 40%.

[0046] The coke oven gas methanation catalyst of this embodiment is prepared by a method comprising the following main steps:

[0047] (1), high-temperature calcination is obtained carrier: the Al of industrial raw material 2 o 3 with MgO(Al 2 o 3 The mass ratio of MgO and MgO is 5:4) in a ball mill, and the grinding time is 2 hours; the material after ball milling is pre-pressed and granulated, and pressed into a columnar carrier green body with a ring press m...

Embodiment 3

[0054] The coke oven gas methanation catalyst in this embodiment mainly includes a carrier, an active material and an auxiliary agent, etc., wherein:

[0055] Take Al 2 o 3 As the carrier, nickel is the main active component (nickel exists in the catalyst in the form of NiO), and MgO is the auxiliary agent; the carrier Al 2 o 3 The support structure of magnesium aluminum spinel is formed with the auxiliary agent MgO; the content of NiO is 5%, Al 2 o 3 The content of MgO is 45%, and the content of MgO is 50%.

[0056] The coke oven gas methanation catalyst of this embodiment is prepared by a method comprising the following main steps:

[0057] (1), high-temperature calcination is obtained carrier: the Al of industrial raw material 2 o 3 with MgO(Al 2 o 3 The mass ratio of MgO and MgO is 4.5:5) mixed in a ball mill, and the grinding time is 2 hours; the material after ball milling is pre-pressed and granulated, and pressed into a columnar carrier green body with a ring ...

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Abstract

The invention discloses a coke oven gas methanation catalyst, which takes Al2O3 as a carrier, nickel as a main active component, and MgO as an auxiliary agent; wherein: the active component nickel exists in the catalyst in the form of NiO, and the carrier Al2O3 and the auxiliary agent MgO form a carrier structure of magnesia-alumina spinel; the main components respectively include, by weight percentage: 5 percent to 20 percent of NiO, 30 percent to 80 percent of Al2O3, and 1 percent to 50 percent of MgO. The catalyst has the advantages of high strength, good activity, good thermal stability, excellent anti-coking performance and good low temperature activity, and also has the properties of transforming high hydrocarbon and good anti-oxidation. The invention also discloses a preparation method of the coke oven gas methanation catalyst.

Description

technical field [0001] The invention belongs to the technical field of methanation catalysts, in particular to an oxide (CO, CO) suitable for carbon in coke oven gas. 2 ) Catalyst in methanation reaction and preparation method thereof. Background technique [0002] In the ammonia synthesis system, the methanation catalyst is used in the hydromethanation reaction of low-concentration carbon oxides. This process is relatively mature. 1% to 2%, while the content of carbon oxides in coke oven gas is 7% to 10%, which is quite high. [0003] The comprehensive utilization of coke oven gas is a special national condition of our country. In recent years, the country has conducted various researches on the application of coke oven gas. At present, coke oven gas in my country is mainly used for hydrogen production, methanol synthesis and ammonia production. In the current situation of high methanol price, the production of methanol has good economic benefits. However, from the pers...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/78C07C1/04C07C9/04
Inventor 郭雄卿涛韩续良斯贵先杨宽辉
Owner SOUTHWEST RES & DESIGN INST OF CHEM IND
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