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Rare earth methanation catalyst as well as preparation method and application thereof

A technology of methanation catalyst and rare earth compound, which is applied in the field of rare earth methanation catalyst and its preparation, can solve the problems of unsatisfactory anti-coking and poor stability, and achieve the effect of good carbon resistance and high strength

Active Publication Date: 2018-09-04
SOUTHWEST RES & DESIGN INST OF CHEM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem solved by the present invention is to provide a rare earth methanation catalyst to solve the problems of poor stability and unsatisfactory resistance to carbon deposition in the prior art for methanation to synthetic natural gas catalysts

Method used

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  • Rare earth methanation catalyst as well as preparation method and application thereof
  • Rare earth methanation catalyst as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] This embodiment provides the preparation of the rare earth methanation catalyst of the present invention, which specifically includes the following steps:

[0037] (1) 10g of calcium nitrate, 25g of magnesium nitrate and 75g of auxiliary aluminum nitrate are prepared to make a mixed solution of 1000mL, and then the mixed solution is heated to 50-70°C and then loaded into the constant temperature storage tank 1;

[0038] (2) Set the concentration of 500mL as Na 2 CO 3 10% is heated to 50-70°C and loaded into the constant temperature storage tank 2;

[0039] (3) After adding 700mL of water to 70g kaolin to prepare a suspension, put it into the reactor; mix the mixed solution in the constant temperature storage tank 1 and the Na 2 CO 3 The solution is simultaneously added to the reactor containing the kaolin suspension to react, and the mixed solution and Na 2 CO 3 The speed of adding the solution keeps the pH of the reaction system at 7.0-8.5, and the reaction time ...

Embodiment 2

[0045] This embodiment provides the preparation of the rare earth methanation catalyst of the present invention, which specifically includes the following steps:

[0046] (1) 12g of calcium nitrate, 30g of magnesium nitrate and 70g of auxiliary aluminum nitrate are prepared to make a mixed solution of 1000mL, and then the mixed solution is heated to 50-70°C and then loaded into the constant temperature storage tank 1;

[0047] (2) Set the concentration of 500mL as Na 2 CO 3 10% is heated to 50-70°C and loaded into the constant temperature storage tank 2;

[0048] (3) After adding 72g of kaolin and 1440mL of water to prepare a suspension, put it into the reactor; mix the mixed solution in the constant temperature storage tank 1 and the Na 2 CO 3 The solution is simultaneously added to the reactor containing the kaolin suspension to react, and the mixed solution and Na 2 CO 3 The speed of adding the solution keeps the pH of the reaction system at 7.0-8.5, and the reaction ...

Embodiment 3

[0054] This embodiment provides the preparation of the rare earth methanation catalyst of the present invention, which specifically includes the following steps:

[0055] (1) 20g of calcium nitrate, 20g of magnesium nitrate and 66g of auxiliary aluminum nitrate were prepared to make a mixed solution of 1000mL, and then the mixed solution was heated to 50-70°C and then loaded into the constant temperature storage tank 1;

[0056] (2) Set the concentration of 500mL as Na 2 CO 3 10% is heated to 50-70°C and loaded into the constant temperature storage tank 2;

[0057] (3) After adding 1000mL of water to 78g kaolin to prepare a suspension, put it into the reactor; mix the mixed solution in the constant temperature storage tank 1 and the Na 2 CO 3 The solution is simultaneously added to the reactor containing the kaolin suspension to react, and the mixed solution and Na 2 CO 3 The speed of adding the solution keeps the pH of the reaction system at 7.0-8.5, and the reaction ti...

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Abstract

The invention discloses a rare earth methanation catalyst. The problems of poor stability and unsatisfactory resistance to carbon deposition of a synthetic natural gas catalyst prepared by methanationin the prior art are solved. The rare earth methanation catalyst comprises a carrier with alkalescence, a rare earth compound, nickel oxide and a potassium-containing compound supported on the carrier with alkalescence; the sum of the total weight percentages of the catalyst is 100%; the weight percentage of each component is as follows: the carrier with alkalescence: 60% to 90%, the rare earth compound: 0.5% to 2%, the nickel oxide: 8% to 40%, and the potassium-containing compound: 0.2% to 1 %. The invention further discloses a preparation method of the rare earth methanation catalyst and the application thereof to preparation of synthetic natural gas by synthesis gas. The catalyst provided by the invention is high in strength, good in carbon resistance, and suitable for a reaction undera high temperature condition.

Description

technical field [0001] The invention belongs to the technical field of methanation catalysts, in particular to a rare earth methanation catalyst and its preparation method and application. 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. less heat. However, the content of carbon oxides to be treated in coke oven gas and other syngas to produce synthetic natural gas is 10% to 30%, which is quite high, the amount of methanation reaction is large, and the adiabatic temperature rise of the reaction is very large. The proposal of synthetic natural gas catalyst higher requirement. At present, domestic methanation to synthetic natural gas catalysts have poor stability and unsatisfactory resistance to carbon deposition, making it difficult to meet the requirements of the production process. [0003] Chinese patent CN 103691444 A (a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/83B01J37/02C10L3/08
CPCB01J23/83B01J37/0201B01J37/0207C10L3/08
Inventor 刘玉成何洋曾凌云冯雅晨凡美婷王雪峰谭青胡彭
Owner SOUTHWEST RES & DESIGN INST OF CHEM IND
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