Active-carbon-based sulfur-tolerant shift catalyst and preparation method of catalyst

A technology of sulfur-resistant transformation and activated carbon, which is applied in the direction of catalyst carriers, chemical instruments and methods, physical/chemical process catalysts, etc., to achieve stable performance, long life and good activity

Inactive Publication Date: 2018-01-09
CHINA PETROLEUM & CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

None of the above patents involves the use of calcium hydroxide

Method used

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  • Active-carbon-based sulfur-tolerant shift catalyst and preparation method of catalyst

Examples

Experimental program
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Effect test

Embodiment 1

[0032] 500g Ca(OH) 2 Put it in a container, add 2Kg of deionized water, keep the temperature at 10°C, let it stand after stirring, and separate layers, take 1Kg of the supernatant and put it in the reaction kettle, add 3.8g of pseudo-boehmite and 46g of activated carbon, and stir for 10 minutes , Carbon dioxide was introduced while stirring, and after 2 hours of reaction, the mixture was released and filtered to obtain a filtered precipitate.

[0033] Dry the precipitate at 120°C, crush it to no less than 200 mesh, put it in a kneader, take 150ml of water, add 3ml of concentrated sulfuric acid, pour the water into the kneader, knead for 30 minutes, extrude, and dry , and calcined at 800°C for 3h under anaerobic conditions to obtain the carrier.

[0034] Place 6.5g of cobalt nitrate and 6.2g of ammonium heptamolybdate in 40ml of ammonia water to form a complex solution, impregnate the above-mentioned carrier in an equal amount, dry it naturally, and roast at 530°C for 3 hours ...

Embodiment 2

[0036] 400g Ca(OH) 2 Put it in a container, add 3Kg of deionized water, keep the temperature at 10°C, let it stand after stirring, and separate layers, take 2Kg of the supernatant and put it in the reaction kettle, add 7.6g of pseudo-boehmite and 92g of activated carbon, and stir for 10 minutes , Carbon dioxide was introduced while stirring, and after 1.8h of reaction, the mixture was released and filtered to obtain a filtered precipitate.

[0037] Dry the precipitate at 125°C, crush it to no less than 200 mesh, put it in a kneader, take 300ml of water, add 6ml of concentrated sulfuric acid, pour the water into the kneader, knead for 50 minutes, extrude, and dry , and calcined at 900°C for 2.5h under anaerobic conditions to obtain a carrier.

[0038] Place 13g of cobalt nitrate and 12.4g of ammonium heptamolybdate in 80ml of ammonia water to form a complex solution, impregnate the above-mentioned carrier in equal amounts, dry it naturally, and roast it at 550°C for 2.5h under...

Embodiment 3

[0040] 400g Ca(OH) 2 Put it in a container, add 2Kg of deionized water, keep the temperature at 10°C, let it stand after stirring, and separate layers, take 1Kg of the supernatant and put it in a reaction kettle, add 5.6g of pseudo-boehmite and 43g of activated carbon, and stir for 10 minutes , Carbon dioxide was introduced while stirring, and after 2.3h of reaction, the mixture was released and filtered to obtain a filtered precipitate.

[0041] Dry the precipitate at 110°C, crush it to no less than 200 mesh, put it in a kneader, take 150ml of water, add 3ml of concentrated sulfuric acid, pour the water into the kneader, knead for 40 minutes, extrude, and dry , and calcined at 750°C for 2h under anaerobic conditions to obtain the carrier.

[0042] Place 8.7g of cobalt nitrate and 7.0g of ammonium heptamolybdate in 40ml of ammonia water to form a complex solution, impregnate the above-mentioned carrier in equal amounts, dry it naturally, and roast it at 500°C for 2 hours unde...

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Abstract

The invention belongs to the technical field of sulfur-tolerant shift, and particularly relates to an active-carbon-based sulfur-tolerant shift catalyst and a preparation method of the catalyst. The catalyst comprises the following components in percentage by weight: 4-7% of Al2O3, 2-3% of CaO, 77-85% of C, 2-4% of CoO and 27-9% of MoO. The invention also provides the preparation method of the catalyst. Activated carbon, pseudo-boehmite and calcium hydroxide are used to prepare a carrier, and then impregnation is performed by using cobalt-molybdenum active components. The prepared sulfur-tolerant shift catalyst has high strength, good activity, long service life and stable performance, and has the ability of resisting severe working conditions such as high temperature, high space velocityand the like.

Description

technical field [0001] The invention belongs to the technical field of sulfur-tolerant shifting, and in particular relates to an activated carbon-based sulfur-tolerant shifting catalyst and a preparation method thereof. Background technique [0002] The CO shift reaction is an important step in the production of raw gas from coal. This reaction can only be carried out under the catalysis of the shift catalyst. The common shift catalysts are divided into iron-chromium series, copper series and cobalt-molybdenum series by active components. The cobalt-molybdenum system is the most widely used due to its wide active temperature range, sulfur tolerance, and good toxicity resistance. Domestic cobalt-molybdenum-based sulfur-tolerant shift catalysts generally use cobalt-molybdenum as the active component, magnesium-aluminum-titanium as the carrier, and additives such as rare earths, which are relatively mature in industry. [0003] Activated carbon has the characteristics of highl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/887B01J23/02B01J32/00
Inventor 齐焕东赵庆鲁白志敏王昊姜建波薛红霞
Owner CHINA PETROLEUM & CHEM CORP
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