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Sulfur-tolerant methanation catalyst and preparation method thereof

A sulfur-resistant methanation and catalyst technology, applied in physical/chemical process catalysts, chemical instruments and methods, and hydrocarbon production from carbon oxides, can solve problems such as poor selectivity and low CO conversion

Active Publication Date: 2016-05-18
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-tolerant methanation catalyst and preparation method thereof
  • Sulfur-tolerant methanation catalyst and preparation method thereof
  • Sulfur-tolerant methanation catalyst and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0054] Weigh 300 grams of pseudo-boehmite raw powder and roast at 850°C for 8 hours to obtain powder I; weigh 160 grams of the above-mentioned powder I and pseudo-boehmite powder in a weight percentage of 80:20 to obtain powder Body II; Weigh 148 grams of powder II, add MoO in weight percentage 3 Mix 160 grams of 25.0% ammonium molybdate solution, dry and dehydrate at 80°C for 24 hours, and remake powder III; the above powder III and the aqueous solution containing 3% nitric acid in weight percentage are 100:85 by weight , adding 5 grams of Tianqing powder, kneading and extruding, drying at 120°C for 4 hours, and roasting at 550°C for 3 hours to obtain catalyst precursor I; weigh 94 grams of catalyst precursor I and the content of Ni contained in weight percent 2 P is that 100 grams of the acidic aqueous solution of nickel hypophosphite and ammonium hypophosphite of 6% are impregnated, wherein the mol ratio of nickel hypophosphite and ammonium hypophosphite in the acidic aqueo...

Embodiment 2

[0061] Weigh 300 grams of pseudo-boehmite powder and roast at 850°C for 8 hours to obtain powder I; weigh 160 grams of the above-mentioned powder I and pseudo-boehmite powder in a weight percentage of 80:20 to obtain Original powder II; Weigh 124 grams of original powder II, add MoO in weight percentage 3 Mix 150 grams of 40.0% ammonium molybdate solution, dry and dehydrate at 80°C for 24 hours, and remake powder III; the above powder III and the aqueous solution containing 3% nitric acid in weight percentage are 100:85 by weight , adding 3 grams of Tianqing powder, kneading and extruding, drying at 120°C for 4 hours, and roasting at 550°C for 3 hours to obtain catalyst precursor I; weigh 92 grams of catalyst precursor I and the Ni-containing 2 The acidic aqueous solution of nickel hypophosphite and ammonium hypophosphite with P being 8% is impregnated in equal volume, wherein the molar ratio of nickel hypophosphite and ammonium hypophosphite in the acidic aqueous solution is ...

Embodiment 3

[0065] Weigh 300 grams of pseudo-boehmite powder and roast at 850°C for 8 hours to obtain powder I; weigh 160 grams of the above-mentioned powder I and pseudo-boehmite powder in a weight percentage of 80:20 to obtain Raw powder II; Weigh 140 grams of raw powder II, add MoO in weight percentage 3 Mix 150 grams of 40.0% ammonium molybdate solution, dry and dehydrate at 80°C for 24 hours, and remake powder III; the above powder III and the aqueous solution containing 3% nitric acid in weight percentage are 100:85 by weight , adding 3 grams of Tianqing powder, kneading and extrusion molding, drying at 120°C for 4 hours, and roasting at 550°C for 3 hours to obtain catalyst precursor I; weigh 100 grams of catalyst precursor I and 2 The acidic aqueous solution of nickel hypophosphite and ammonium hypophosphite with P being 0.1% is impregnated in equal volume, wherein the molar ratio of nickel hypophosphite and ammonium hypophosphite in the acidic aqueous solution is 1:0.83, and the p...

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Abstract

The invention relates to a sulfur-tolerant methanation catalyst and a preparation method thereof. The invention mainly aims at solving problems of low CO conversion rate and poor CH4 selectivity of sulfur-tolerant methanation catalysts in prior arts. According to the invention, transition metal phosphide and sulfide are adopted as sulfur-tolerant methanation active components, and the catalyst comprises the following components, by weight: (a) 3-30% of MoO3, (b) 0.1-8% of Ni2P, and (c) aluminum oxide. With the technical scheme, the problem is well solved. The method can be used for producing methane from synthetic gas.

Description

technical field [0001] The invention relates to a sulfur-resistant methanation catalyst and a preparation method, mainly adopting transition metal phosphides and sulfides as sulfur-resistant methanation active components, which can be used in the production of methane from sulfur-containing synthesis gas. Background technique [0002] As a clean and efficient energy source, natural gas accounts for an increasing proportion of international energy consumption year by year. China's resource reserves are characterized by "rich in coal, short of oil, and low in gas". Natural gas consumption only accounts for 3.9% of primary energy consumption, which is far below the international average level. In recent years, with the rapid development of the domestic economy, the consumption of natural gas has far exceeded the supply, and there is a serious shortage of supply. my country is rich in coal resources, and the development of coal-to-natural gas (SNG) technology can not only meet ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/19C07C1/04C07C9/04C10L3/08
Inventor 钱斌刘仲能王德举余强
Owner CHINA PETROLEUM & CHEM CORP
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