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Sulfur-resistant methanation catalyst, preparation method and use thereof

A technology for sulfur-resistant methanation and catalyst, which can be used in physical/chemical process catalysts, chemical instruments and methods, and hydrocarbon production from carbon oxides. It can solve the problems of low CO conversion rate and poor selectivity, and achieve good technical results. Effect

Active Publication Date: 2020-09-04
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0017] One of the technical problems to be solved by the present invention is that the sulfur-tolerant methanation catalysts in the prior art have low CO conversion rate, CH 4 The problem of poor selectivity

Method used

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  • Sulfur-resistant methanation catalyst, preparation method and use thereof
  • Sulfur-resistant methanation catalyst, preparation method and use thereof
  • Sulfur-resistant methanation catalyst, preparation method and use thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0060] Weigh 300 grams of the original pseudo-boehmite powder and roast at 850°C for 8 hours to obtain powder α; weigh 160 grams of the above-mentioned powder α and pseudo-boehmite powder by mass percentage and mix them at 80:20 to obtain powder Body β; Weigh 148 grams of powder β, add MoS 2 It is mixed with 160 grams of 25.0% ammonium thiomolybdate solution, then dried at 80 ° C for 24 hours for dehydration, and re-made into powder γ; the above powder γ and the aqueous solution containing 3% nitric acid by mass percentage are 100 by mass. : 85, adding 5 grams of Tianqing powder, kneading and extruding, drying at 120°C for 4 hours and calcining at 550°C for 3 hours to obtain catalyst precursor I; Weigh 94 grams of catalyst precursor I and Ni 3 P is 4% nickel hypophosphite and Fe by mass 3 P is 2% ferric hypophosphite and 100 grams of ammonium hypophosphite acid aqueous solution for impregnation, wherein the molar ratio of nickel hypophosphite and ammonium hypophosphite in the...

Embodiment 2

[0068] Weigh 300 grams of the original pseudo-boehmite powder and roast at 850°C for 8 hours to obtain powder α; weigh 160 grams of the above-mentioned powder α and pseudo-boehmite powder by mass percentage and mix them at 80:20 to obtain powder Body β; Weigh 124 grams of powder β, add MoS 2 It is mixed with 150 grams of 20.0% ammonium thiomolybdate solution, then dried at 80 ° C for 24 hours and dehydrated, and re-made into powder γ; the above powder γ and the aqueous solution containing 3% nitric acid by mass percentage are 100 by mass. : 85, adding 3 grams of Tianqing powder, kneading and extruding, drying at 120°C for 4 hours and calcining at 550°C for 3 hours to obtain catalyst precursor I; Weigh 92 grams of catalyst precursor I and Ni 3 P is 4.5% nickel hypophosphite and Fe by mass 3 P is 3% ferric hypophosphite and 100 grams of ammonium hypophosphite acid aqueous solution for impregnation, wherein the molar ratio of nickel hypophosphite and ammonium hypophosphite in th...

Embodiment 3

[0075] Weigh 300 grams of the original pseudo-boehmite powder and roast at 850°C for 8 hours to obtain powder α; weigh 160 grams of the above-mentioned powder α and pseudo-boehmite powder by mass percentage and mix them at 80:20 to obtain powder Body β; Weigh 140 grams of powder β, add MoS 2 It is mixed with 150 grams of 20.0% ammonium thiomolybdate solution, then dried at 80 ° C for 24 hours and dehydrated, and re-made into powder γ; the above powder γ and the aqueous solution containing 3% nitric acid by mass percentage are 100 by mass. : 85, adding 3 grams of Tianqing powder, kneading and extruding, drying at 120°C for 4 hours and calcining at 550°C for 3 hours to obtain catalyst precursor I; Weigh 100 grams of catalyst precursor I and Ni 3 P is 0.1% nickel hypophosphite and Fe by mass 3 P is 100 grams of 0.5% ferric hypophosphite and ammonium hypophosphite acid aqueous solution for impregnation, wherein the molar ratio of nickel hypophosphite and ammonium hypophosphite in...

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Abstract

The invention relates to a sulfur-tolerant methanation catalyst and a preparation method thereof and mainly aims at solving the problems of low CO conversion rate and poor CH4 selectivity of the sulfur-tolerant methanation catalyst in the prior art. The problems are better solved by adopting the technical scheme that transition metal sulfides and phosphides are used as active ingredients in the sulfur-tolerant methanation catalyst, and the catalyst comprises the following components in percentage by mass: a) 5-25% of MoS2; b) 0-3.5% of Fe3P; c) 0-5% of Ni3P; and d) aluminum oxide. Compared with the traditional sulfur-tolerant methanation catalyst, the sulfur-tolerant methanation catalyst has high CO conversion rate and CH4 selectivity, is used for solving the problems of low activity and poor selectivity of the traditional sulfur-tolerant methanation catalyst and can be used for production for preparing methane by using synthesis gas.

Description

technical field [0001] The invention relates to a sulfur-resistant methanation catalyst, a preparation method and use thereof, which mainly adopt transition metal sulfide and phosphide as sulfur-resistant methanation active components, which can be used in the production of sulfur-containing synthesis gas to produce methane. Background technique [0002] Coal-to-natural gas (SNG) is the best way to produce coal-based energy products and has a bright future. At present, the international commercial coal-to-natural gas technology is mainly based on a two-step method, which mainly includes coal gasification to produce syngas and complete methanation of syngas to produce substitute natural gas. There are two main process routes to realize syngas methanation, one is to use non-sulfur-tolerant methanation process; the other is to use sulfur-tolerant methanation process. [0003] The non-sulfur-resistant methanation process uses nickel-based methanation catalysts. Due to the poor ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/19B01J27/051C07C1/04C07C9/04
Inventor 余强刘革钱斌刘仲能李则俊
Owner CHINA PETROLEUM & CHEM CORP
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