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Silicon carbide modified sulfur tolerant shift catalyst and preparation method thereof

A technology of sulfur-resistant conversion and silicon carbide, which is applied in the direction of physical/chemical process catalysts, chemical instruments and methods, and catalytic treatment of combustible gases. It can solve the problems of catalyst activity stability decline, poor high temperature resistance, and shortened life. Achieve the effects of strengthening catalyst structure and activity stability, good hydrogen sulfide adsorption performance, and prolonging service life

Active Publication Date: 2018-03-09
CHINA PETROLEUM & CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the current industrial sulfur-tolerant shift catalysts have poor high temperature resistance. When the temperature is higher than 500°C, the stability of the catalyst activity will be significantly reduced and the service life will be shortened.

Method used

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  • Silicon carbide modified sulfur tolerant shift catalyst and preparation method thereof
  • Silicon carbide modified sulfur tolerant shift catalyst and preparation method thereof
  • Silicon carbide modified sulfur tolerant shift catalyst and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Mix 44.0g of aluminum glue, 50.0g of magnesium stearate, and 5.0g of titanium oxide powder evenly, add 18.5g of silicon carbide, 35.0g of silicon oxide, and 12.0g of fruit shell activated carbon powder, mix evenly, put them into a ball mill for 2.0 hours, and then each Add 2.0g of scallop powder and 3.0g of starch and mix evenly to form mixture A. Dissolve 12.4g of ammonium molybdate in 20mL of deionized water, add it to the above mixture A, and knead for 10 minutes; dissolve 16.0g of cobalt nitrate and 13.0g of magnesium nitrate In 25mL of deionized water, continue to add mixture A, knead for 10 minutes, extrude into strips, dry naturally, and calcinate at 800°C for 2 hours to obtain the finished catalyst.

Embodiment 2

[0035] Mix 45.0g of alumina, 37g of magnesium oxalate, and 2.5g of metatitanic acid powder, add 10g of silicon carbide, 10g of silicon oxide, and 2g of fruit shell activated carbon powder, mix evenly, put it into a ball mill for 1 hour, and then add 3g of safflower powder Mix with 3g sucrose evenly to form mixture A, dissolve 10.0g ammonium molybdate in 15mL deionized water, add to the above mixture A, knead for 8 minutes; dissolve 16g cobalt nitrate and 18.5g magnesium nitrate in 30mL deionized water, continue to add Mixture A was kneaded for 15 minutes, extruded into strips, dried naturally, and calcined at 650°C for 2 hours to obtain the finished catalyst.

Embodiment 3

[0037] Mix 30.0g of pseudo-boehmite, 8.0g of light magnesia, and 7.5g of metatitanic acid powder, add 9.5g of silicon carbide, 20.0g of silicon oxide, and 4g of coconut shell activated carbon powder, mix evenly, and put it into a ball mill for 1.5 hours , then add 4g of citric acid and 3g of starch and mix uniformly to form mixture A, dissolve 11.0g of ammonium molybdate in 20mL of deionized water, add to the above mixture A, and knead for 2 minutes; dissolve 6g of cobalt nitrate and 7.4g of magnesium nitrate in Add 15 mL of deionized water to mixture A, knead for 10 minutes, extrude into strips, dry naturally, and calcinate at 700°C for 4 hours to obtain the finished catalyst.

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Abstract

The invention belongs to the technical field of sulfur tolerant shift catalysts, and specifically relates to a silicon carbide modified sulfur tolerant shift catalyst and a preparation method thereof.The catalyst comprises the following chemical components in mass ratio: 22.0% to 45.0% of Al2O3, 7.0% to 15% of MgO, 6.5% to 10.0% of MoO3, 1.5% to 5.0% of CoO, 25.0% to 45.0% of SiO2, 1.0% to 6.0% of TiO2 and the balance of C. The catalyst disclosed by the invention has excellent structure and activity stability and long service life, and is applicable to harsh conditions such as high temperature, high pressure and high airspeed; the preparation method is simple, practicable and easy to produce.

Description

technical field [0001] The invention belongs to the technical field of sulfur-tolerant shift catalysts, in particular to a silicon carbide modified sulfur-tolerant shift catalyst and a preparation method thereof. Background technique [0002] The large-scale and large-scale requirements of the current coal gasification development, as well as the high-content CO shift in the coal gasification process gas, put forward new requirements for the sulfur-tolerant shift catalyst: (1) When the shift reaction occurs in the process gas with high CO content, the shift reaction heat The substantial increase requires the catalyst to have good high temperature resistance; (2) due to the large amount of gas to be processed, the catalyst loading will inevitably increase significantly, and the gas space velocity is also higher than the conventional design value, requiring the sulfur-resistant shift catalyst not only to have higher strength and It should also have high resistance to high spac...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/224C10K3/04
CPCB01J27/224C10K3/04
Inventor 白志敏余汉涛田兆明赵庆鲁齐焕东王昊姜建波薛红霞李文柱
Owner CHINA PETROLEUM & CHEM CORP