High-pressure low-sulfur-tolerant shift catalyst and preparation method thereof

A technology for changing catalysts and catalysts, which is applied in the direction of catalyst activation/preparation, chemical instruments and methods, physical/chemical process catalysts, etc. It can simplify the preparation process and operation process, prevent loss, and increase the stability of activity.

Active Publication Date: 2019-04-16
CHINA PETROLEUM & CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In some domestic coal chemical plants that use low-sulfur coal as the main raw material, there have been situations in which the activity of the catalyst decreased due to the low content of hydrogen sulfide during the operation process, resulting in the conversion outlet CO exceeding the standard.
Especially for the coal gasification gasification process with high pressure (≥4.0MPa), high CO content (≥42%), and high water-gas ratio (1.

Method used

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  • High-pressure low-sulfur-tolerant shift catalyst and preparation method thereof
  • High-pressure low-sulfur-tolerant shift catalyst and preparation method thereof
  • High-pressure low-sulfur-tolerant shift catalyst and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0037] The montmorillonite was first calcined at 450°C for 5 hours, and then crushed through a 240-mesh sieve to obtain heat-treated montmorillonite. Dissolve 8.6g of ammonium molybdate with 40.0mL of deionized water to obtain molybdenum-containing solution A; dissolve 9.7g of cobalt acetate with 40.0mL of deionized water; then add 8.0g of citric acid into the above solution, stir and dissolve to obtain Cobalt-containing mixed solution B.

[0038] Weigh 34.0g montmorillonite, 12.0g magnesia, 43.6g pseudoboehmite, 17.5g metatitanic acid, 3.0g Tianqing powder and mix evenly, add solution A, knead evenly; then add solution B, knead and shape , dried naturally, baked at 550°C for 3h, and then cooled down to room temperature naturally. That is, the finished high-pressure low-sulfur resistant shift catalyst C-1 was obtained.

Embodiment 2

[0040] The montmorillonite was first roasted at 500°C for 6 hours, and then crushed through a 240-mesh sieve to obtain heat-treated montmorillonite. Dissolve 10.5g of ammonium molybdate in 40.0mL of deionized water to obtain solution A containing molybdenum; dissolve 13.6g of cobalt acetate in 40.0mL of deionized water; then add 3.0g of oxalic acid and 5g of citric acid into the above solution, and stir dissolved to obtain a cobalt-containing mixed solution B.

[0041] Weigh 14.5g montmorillonite, 15.0g magnesia, 55.0g pseudoboehmite, 25.0g metatitanic acid, 3.0g Tianqing powder and mix evenly, add solution A, knead evenly; then add solution B, knead and shape , dried naturally, baked at 550°C for 4h, and then cooled down to room temperature naturally. That is, the finished high-pressure low-sulfur resistant shift catalyst C-2 is obtained.

Embodiment 3

[0043] The montmorillonite was first calcined at 530°C for 5 hours, and then crushed through a 240-mesh sieve to obtain heat-treated montmorillonite. Dissolve 10.5g of ammonium molybdate with 40.0mL of deionized water to obtain solution A containing molybdenum; dissolve 9.7g of cobalt nitrate with 40.0mL of deionized water; then add 7.0g of citric acid into the above solution, stir and dissolve to obtain Cobalt-containing mixed solution B.

[0044] Weigh 29.0g of montmorillonite, 14.0g of magnesia, 44.3g of pseudoboehmite, 18.8g of metatitanic acid, 3.0g of Tianqing powder and mix evenly, add solution A, knead evenly; then add solution B, knead and shape , dried naturally, baked at 500°C for 2h, and then cooled down to room temperature naturally. That is, the finished high-pressure low-sulfur resistant shift catalyst C-3 was obtained.

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Abstract

The invention belongs to the technical field of sulfur-tolerant shift in coal chemical industry, and particularly relates to a high-pressure low-sulfur-tolerant shift catalyst and a preparation methodthereof, wherein the catalyst comprises a carrier and an active component, the active component is selected from a binary component of cobalt oxide and molybdenum oxide, the raw materials of the carrier are selected from a magnesium-containing compound, an aluminum-containing compound, a titanium-containing compound and a heat-treated modified montmorillonite. According to the present invention,montmorillonite with characteristics of wide source and low cost is subjected to heat treatment modification to be used as the carrier component so as to reduce the catalyst preparation cost; the montmorillonite is subjected to heat treatment so as to avoid the treatment of the waste acid solution; the product is prepared by the mixing kneading method, such that the active components are uniformlydispersed in the carrier and are not easily lost so as to increase the activity stability of the catalyst; and compared with the impregnation method in the prior art, the method of the present invention has the following advantages that the water consumption is saved, the preparation process and the operation process are simplified, the cost advantage is remarkable, and the prepared catalyst hasgood shift activity and good activity stability under low sulfur condition, and further has good economic benefits and popularization and application prospects.

Description

technical field [0001] The invention belongs to the technical field of sulfur-resistant shifting in coal chemical industry, and in particular relates to a high-pressure low-sulfur-resistant shifting catalyst and a preparation method. Background technique [0002] Cobalt-molybdenum-based sulfur-tolerant shift catalysts have outstanding industrial application performance in the water-gas shift process due to their characteristics such as wide temperature range, high shift activity, good sulfur resistance and anti-poisoning performance. The active components of such catalysts are generally selected from group VIII and VIB metal compounds represented by cobalt and molybdenum, and the additives are generally selected from alkali metal, alkaline earth metal and rare earth metal compounds. Its carrier components are generally selected from industrial raw materials containing Mg, Al, Ti and other elements. Catalysts are generally prepared by co-precipitation, kneading or impregnati...

Claims

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Application Information

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IPC IPC(8): B01J23/882B01J35/10
CPCB01J23/8872B01J35/0093B01J35/1019B01J35/1038B01J37/04B01J37/08
Inventor 赵庆鲁田兆明余汉涛白志敏齐焕东陈依屏李文柱
Owner CHINA PETROLEUM & CHEM CORP
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