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Medium-temperature hydrolysis conversion carbonyl sulfide and deoxygenation bifunctional coupling catalyst and preparation method

A carbonyl sulfide and catalyst technology, which is applied in the field of medium temperature gas purification and catalyst preparation, can solve the problems of overall performance decline, poisoning, and failure to point out that the catalyst is resistant to sulfur and oxygen poisoning, and achieves the effect of improving the resistance to oxygen and sulfur poisoning and stabilizing the medium temperature activity

Active Publication Date: 2021-06-15
SHANXI PULI ENVIRONMENT ENG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

CN1675337A contains O 2 There are two independent catalysts for removal and COS conversion, and the COS conversion catalyst is located in the O 2 Downstream of catalyst removal, mainly utilizing O 2 Removal of O from catalyst combustion gas 2 Prevent O 2 lead to a decrease in the activity of the COS conversion catalyst, but for O 2 The precious metal catalysts removed by combustion are expensive and easy to H 2 S poisoning, leading to overall performance degradation
Relevant literature shows that molybdenum-based catalysts with H 2 It has the ability to catalyze deoxidation under certain conditions, but in the published COS conversion catalyst patents, there is no indication of the invention of molybdenum in the catalyst's resistance to sulfur and oxygen poisoning

Method used

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  • Medium-temperature hydrolysis conversion carbonyl sulfide and deoxygenation bifunctional coupling catalyst and preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] A preparation method capable of simultaneously removing oxygen and hydrolyzing and converting carbonyl sulfide catalyst under medium temperature conditions, as follows:

[0021] (1) Weigh 15g of potassium carbonate and 12.24g of ammonium molybdate and fully dissolve them in distilled water to make a mixed solution, place the prepared mixed solution in a magnetic stirrer and stir continuously at high speed, so that the ions in the solution are mixed evenly;

[0022] (2) Immerse the mixed solution on 75g of spherical alumina carrier with a particle size of φ3~5mm and a water absorption rate of 55%, and seal the container holding the alumina carrier for 12 hours;

[0023] (3) Unseal the container after standing for 12 hours, place it in an oven, and dry it at 120°C for 4 hours;

[0024] (4) Pour the dried sample into a crucible, put the crucible containing the sample into a muffle furnace and roast it in an air atmosphere at 550°C for 5 hours to obtain a roasted sample;

...

Embodiment 2

[0028] A preparation method capable of simultaneously removing oxygen and hydrolyzing and converting carbonyl sulfide catalyst under medium temperature conditions, as follows:

[0029] (1) Weigh 10g of potassium carbonate and 6.12g of ammonium molybdate and fully dissolve them in distilled water to make a mixed solution. Place the prepared mixed solution in a magnetic stirrer and stir continuously at high speed, so that the ions in the solution are mixed evenly ;

[0030] (2) Immerse the mixed solution on 85g of spherical alumina carrier with a particle size of φ3~5mm and a water absorption rate of 55%, and seal the container holding the alumina carrier for 12 hours;

[0031] (3) Unseal the container after standing for 12 hours, place it in an oven, and dry it at 120°C for 4 hours;

[0032] (4) Pour the dried sample into a crucible, put the crucible containing the sample into a muffle furnace and roast it in an air atmosphere at 550°C for 5 hours to obtain a roasted sample; ...

Embodiment 3

[0036] A preparation method capable of simultaneously removing oxygen and hydrolyzing and converting carbonyl sulfide catalyst under medium temperature conditions, as follows:

[0037] (1) Weigh 15g of potassium carbonate and 12.24g of ammonium molybdate and fully dissolve them in distilled water to make a mixed solution, place the mixed solution in a magnetic stirrer and stir continuously at high speed, so that the ions in the solution are mixed evenly ;

[0038] (2) Immerse the mixed solution on 75g of spherical alumina carrier with a particle size of φ3~5mm and a water absorption rate of 55%, and seal the container holding the alumina carrier for 12 hours;

[0039] (3) Unseal the container after standing for 12 hours, place it in an oven, and dry it at 120°C for 4 hours;

[0040] (4) Pour the dried sample into a crucible, put the crucible containing the sample into a muffle furnace and roast it in an air atmosphere at 550°C for 5 hours to obtain a roasted sample;

[0041]...

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Abstract

The invention discloses a medium-temperature hydrolysis conversion carbonyl sulfide and deoxidation dual-functional coupling catalyst, which uses spherical activated alumina as a carrier, and uses potassium carbonate and ammonium molybdate as active groups for hydrolysis conversion carbonyl sulfide and deoxygenation respectively. Divide the raw materials, load the active components on the carrier by the equal volume co-impregnation method, and then dry at low temperature, activate at high temperature, and vulcanize at medium temperature. Aluminum, its deoxidation active component is molybdenum disulfide, its hydrolysis conversion carbonyl sulfide active component is potassium carbonate, and the contents of the three catalyst components are respectively Al 2 o 3 74~85wt.%, K 2 CO 3 10~15wt.%, MoS 2 5~11wt.%, can simultaneously remove the oxygen in the feed gas and hydrolyze the conversion of carbonyl sulfide, thereby avoiding the rapid decline of the hydrolysis activity of the active component of the carbonyl sulfide hydrolysis of the catalyst due to oxygen poisoning under medium temperature conditions.

Description

technical field [0001] The invention relates to the field of medium-temperature gas purification and catalyst preparation, in particular to a medium-temperature hydrolysis conversion carbonyl sulfide and deoxidation dual-functional coupling catalyst and a preparation method, which are applied to the clean transformation and utilization of fossil raw materials. Background technique [0002] The development and utilization of energy is the foundation of economic and social development. According to "BP 2016 World Energy Statistics", China is still the world's largest energy consumer. In my country's energy consumption structure, fossil energy-coal accounts for 64% of China's energy consumption structure. Although it has reached the lowest value in history, it still dominates China's primary energy consumption. And in China for a period of time to come, coal will still be used as the main energy resource. However, while making a significant contribution to society during the d...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/236B01D53/86B01D53/48B01D53/46
CPCB01D53/8606B01D53/8671B01D2257/104B01D2257/308B01J27/236
Inventor 上官炬徐壹堃梁丽彤寇佳伟沈芳樊惠玲秦志峰苗茂谦
Owner SHANXI PULI ENVIRONMENT ENG CO LTD
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