Catalyst for methanation and preparation method thereof

A methanation catalyst and catalyst technology, applied in the field of catalysis, can solve the problems of poor hydrothermal stability and unsuitability for use, and achieve the effects of good stability, prevention of carbon deposition, and high mechanical strength

Inactive Publication Date: 2012-06-20
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the carriers of these catalysts have poor hydrothermal stability and are not suitable for use in coal-based syngas methanation reactions.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] 1) Take 600g of alumina monohydrate and heat-treat it at 120°C~300°C for 1h~3h; 2) Add 18g of cellulose and 300g of deionized water to the heat-treated alumina and knead evenly; 3) Put The uniformly kneaded material is granulated into particles with a particle size of about 1.2mm, and dried at 120°C for 3~5h; 4) Add 12g of graphite to the dried particles and mix them evenly, and press them into Ф5×5 cylindrical particles through a tablet press ;5) The tablet is calcined at 700°C~1200°C to obtain the carrier required for the preparation of the catalyst; 6) Immerse the carrier in the nickel nitrate solution for 0.5h~3h, take it out and dry it at 120°C, and then dry it at 400°C~600°C Calcination for 2h~4h; 7) Repeat step 6) to make the NiO loading reach 10~25%, and obtain catalyst Ⅰ.

Embodiment 2

[0017] 1) Take 600g of alumina monohydrate and heat-treat it at 120°C~300°C for 1h~3h; 2) Add 18g of cellulose and 300g of deionized water to the heat-treated alumina and knead evenly; 3) Put The uniformly kneaded material is granulated into particles with a particle size of about 1.2mm, and dried at 120°C for 3~5h; 4) Add 12g of graphite to the dried particles and mix them evenly, and press them into Ф5×5 cylindrical particles through a tablet press ;5) The tablet is roasted at 700°C~1200°C to obtain the carrier required for the preparation of the catalyst; 6) The carrier is immersed in the solution of nickel nitrate and lanthanum nitrate for 0.5h~3h, taken out and dried at 120°C, and then dried at 400°C Calcination at ~600°C for 2h~4h; 7) Repeat step 6) to make the NiO loading reach 10~25% to obtain catalyst II.

Embodiment 3

[0019] 1) Take 600g of alumina monohydrate and heat-treat it at 120°C~300°C for 1h~3h; 2) Add 18g of cellulose and 300g of deionized water to the heat-treated alumina and knead evenly; 3) Put The uniformly kneaded material is granulated into particles with a particle size of about 1.2mm, and dried at 120°C for 3~5h; 4) Add 12g of graphite to the dried particles and mix them evenly, and press them into Ф5×5 cylindrical particles through a tablet press ;5) The tablet is roasted at 700°C~1200°C to obtain the carrier required for the preparation of the catalyst; 6) The carrier is immersed in the solution of nickel nitrate, potassium nitrate (or potassium carbonate) and lanthanum nitrate for 0.5h~3h, and taken out at 120°C drying at 400°C-600°C for 2h-4h; 7) Repeat step 6) to make the NiO loading reach 10-25% to obtain catalyst III.

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Abstract

The invention which belongs to the technical field of catalysis relates to a catalyst for methanation and a preparation method thereof. The preparation method comprises the following steps: 1, fully mixing alumina (or pseudoboehmite) with a pore forming agent and a binder, adding deionized water, granulating, drying, compression-molding, and roasting to prepare a catalyst carrier; and 2, dipping the catalyst carrier in a solution of nickel nitrate and lanthanum nitrate (or potassium nitrate, or potassium carbonate, or cerium nitrate, or cerous nitrate), drying, and roasting to prepare the catalyst. The catalyst prepared through the method of the invention, which has the advantages of high mechanical strength and good hydrothermal stability, is suitable for methanation reactions carried out under conditions that the CO content is high and the reaction temperature is high, and can effectively prevent carbon deposition.

Description

technical field [0001] The invention belongs to the technical field of catalysis, and in particular relates to a methanation catalyst and a preparation method thereof. The catalyst is used for synthesis gas to produce natural gas. Background technique [0002] Natural gas is an efficient and clean energy. In recent years, with the successive completion and commissioning of national-level gas transmission projects such as "Shaanxi Gas Entering Beijing" and "West-to-East Gas Transmission", the demand for natural gas has shown explosive growth. It is predicted that in 2015, China's natural gas demand will reach 170-210 billion Nm 3 , while the natural gas production in the same period can only reach 140 billion Nm 3 , the gap between supply and demand is about 30-70 billion Nm 3 . Due to the huge gap between the supply and demand of natural gas and relatively abundant coal resources in my country, coal-based synthetic gas SNG is an effective way to solve the contradiction b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/755B01J23/83C07C9/04C07C1/04
Inventor 蔡成伟魏士新蔡进檀结东陈长新吴学其张杰吴琳孟建朱艳芳赵华
Owner CHINA PETROLEUM & CHEM CORP
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