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High-temperature type catalyst for methane synthesis, preparing method and methane synthesis method

A methane synthesis and catalyst technology, which is applied in the high-temperature methane synthesis catalyst, preparation method and methane synthesis field, can solve problems such as difficult control, severe heat release of methanation reaction, easy sintering deactivation, etc., to save use and avoid pollution The risk of substance, the effect of not easy to sinter and deactivate

Active Publication Date: 2014-08-06
SHANGHAI BEINENG CHEM TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved by the present invention is to provide a high-temperature type methane synthesis catalyst in order to overcome the defects of severe heat release in the existing methanation reaction, difficulty in controlling the rise of the bed temperature, and the catalyst is not resistant to high temperature and is easy to be sintered and deactivated. , preparation method and methane synthesis method
The catalyst of the present invention is resistant to high temperature and is not easy to be deactivated by sintering, and the method for synthesizing methane of the present invention effectively solves the problem of severe exothermic reaction, and the conversion rate of the synthesized methane is high

Method used

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  • High-temperature type catalyst for methane synthesis, preparing method and methane synthesis method
  • High-temperature type catalyst for methane synthesis, preparing method and methane synthesis method
  • High-temperature type catalyst for methane synthesis, preparing method and methane synthesis method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0058] (1) Preparation of catalyst

[0059] 1) Accurately weigh a certain mass of nickel nitrate, lanthanum nitrate, hydrotalcite raw materials, Al 2 o 3 , scallop powder, mixed evenly for subsequent use, wherein the mass ratio of nickel nitrate and lanthanum nitrate is 5:1, the mass ratio of nickel nitrate and hydrotalcite raw material is 1.2:1, nickel nitrate and Al 2 o 3 The mass ratio of nickel nitrate and safflower powder is 0.4:1.

[0060] 2) Heating the raw material obtained in step 1) to 80° C., so that the fusible metal salt is in a molten state, continuously stirring and aging for 1 hour.

[0061] 3) Take the raw material mixture obtained in step 2) and burn it at 410° C. for 2 hours with programmed temperature increase at a rate of 5° C. / min. Then the mixture was cooled to normal temperature, and after compression molding, it was further calcined at 600° C. for 2 h with a programmed temperature increase rate of 5° C. / min.

[0062] The composition that finally o...

Embodiment 2

[0073] (1) Preparation of catalyst

[0074] The preparation of catalyst is with embodiment 1

[0075] (2) Methanation reaction

[0076] In this embodiment, coke oven gas is used as raw material, figure 2 A schematic diagram of the process.

[0077] The composition of the purified coke oven gas is: (Vol%)H 2 58.7, CO6.5, CH 4 26.5, CO 2 2.1,N 2 4.2, O 2 0.5, C m h n 1.5.

[0078] In this example, a two-stage fixed bed is used as the reactor, and the coke oven gas is raised to 260°C and enters the reactor to participate in the reaction. The optimized design keeps the outlet temperature of the first reactor at 630°C and the outlet temperature of the second reactor at 340°C. Part of the material at the outlet of the first reactor is returned to the inlet of the first reactor to be mixed with fresh material, the circulation ratio is 0.6, and the reaction conditions are as follows:

[0079]

[0080] Reactor outlet material composition: (Vol%)H 2 43.1, CO0.012, CH 4 ...

Embodiment 3

[0082] (1) Preparation of catalyst

[0083] The preparation of catalyst is with embodiment 1

[0084] (2) Methanation reaction

[0085] In this embodiment, refined synthesis gas is used as raw material, image 3 A schematic diagram of the process.

[0086] The composition of refined syngas is: n(H 2 ) / n(CO)=3.

[0087] In this example, a three-stage fixed-bed reactor is used, and the synthesis gas enters the reactor at 280° C. to participate in the reaction. The inlet temperature of the third reactor was 260°C, the outlet temperature of the first and second reactors were both 650°C, and the outlet temperature of the third reactor was 380°C.

[0088] In order to make reasonable use of heat and reduce the concentration of reactants at the reactor inlet, a part of the material at the outlet of the second reactor is returned to the inlet of the first reactor to be mixed with fresh material, and the circulation ratio is 1.2:1. Wherein the reaction conditions are as follows: ...

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Abstract

The invention discloses a high-temperature type catalyst for methane synthesis, a preparing method thereof and a methane synthesis method. The catalyst preparing method comprises the following steps: (1), heating a mixture of metal salt, hydrotalcite, a binder and a pore-forming agent at a temperature of 50-110 DEG C, wherein the metal salt is a mixture of nickel salt and rare earth element salt or a mixture of nickel salt and cobalt salt; (2) raising the temperature to 300-450 DEG C at a speed of 0.1-10 DEG C per minute to carry out primary erosion, cooling to 10-30 DEG C, molding through compression, and raising the temperature to 500-800 DEG C at a speed of 0.1-10 DEG C per minute to carry out secondary erosion. The catalyst is resistant to high temperature and cannot be easily sintered and inactivated. The problem that heat is seriously dissipated during reaction is effectively solved by the methane synthesis method, and the conversion rate of the synthesized methane is high.

Description

technical field [0001] The invention relates to the field of petrochemical industry, in particular to a catalyst for high-temperature methane synthesis, a preparation method and a methane synthesis method. Background technique [0002] For a long time, oil and natural gas have dominated the world's energy consumption and raw material consumption for the production of industrial chemicals. However, in the past two decades, whether it is the rising prices of the two or the estimation that their resources are only enough to maintain the current level of economic development for 40 to 60 years, people have given great enthusiasm and enthusiasm to develop new alternative energy sources. power. In particular, coal, which is expected to be available for more than 150 years of resource reserves, has historically received extensive attention and a large amount of investment in technology research and development in order to change its traditional utilization form, such as the Fische...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/83B01J23/755C07C1/04C07C9/04C10L3/08
Inventor 杨晓倩
Owner SHANGHAI BEINENG CHEM TECH