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Carbonyl sulfide hydrolysis catalyst taking modified silica gel as carrier and preparation method thereof

A hydrolysis catalyst, carbonyl sulfide technology, applied in catalyst activation/preparation, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problems of easy deposition of sulfur, high reaction temperature, easy poisoning, etc. Improves diffusivity and stabilizes catalyst activity

Pending Publication Date: 2021-01-12
SINOPEC YANGZI PETROCHEM +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problems of high reaction temperature, easy deposition of sulfur, and easy poisoning required by the above-mentioned catalyst, a carbonyl sulfide hydrolysis catalyst with modified silica gel as a carrier and its preparation method are provided

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] (1) Slowly add 10g of coarse-porous silica gel to 20g of deionized water, hydrothermally treat it in a hydrothermal reactor at 80°C for 12h, take it out, and vacuum dry it in a vacuum oven at 80°C for 3h to obtain modified silica gel.

[0019] (2) Mix 5g modified silica gel in 5g 5% CH 3 Immerse in COOLi solution at 25° C. for 24 hours to obtain modified silica gel loaded with active components.

[0020] (3) The above-mentioned modified silica gel loaded with active components was vacuum-dried in a vacuum oven at 60° C. for 3 hours, and then calcined in a muffle furnace at 350° C. for 6 hours to obtain a silica-based carbonyl sulfide hydrolysis catalyst 1 .

[0021] When using silica gel-based carbonyl sulfide hydrolysis catalyst 1 to remove COS, fill 0.5g of the catalyst in a fixed bed reactor (Φ6mm*120mm), reaction conditions: temperature 85°C, space velocity 2000h -1 , COS concentration 100ppm. The COS hydrolysis activity is shown in Table 1 below.

[0022] Table ...

Embodiment 2

[0025] (1) Slowly add 10g of coarse-porous silica gel to 20g of deionized water, hydrothermally treat it in a hydrothermal reactor at 100°C for 24h, take it out, and vacuum dry it in a vacuum oven at 60°C for 6h to obtain modified silica gel.

[0026] (2) Mix 5g modified silica gel in 5g 15% CH 3 The modified silica gel loaded with active components was obtained by immersing in COOCs solution at 25°C for 4 hours.

[0027] (3) After the above-mentioned modified silica gel loaded with active components was vacuum-dried in a vacuum oven at 60°C for 6 hours, N was introduced into a tube furnace at 550°C 2 Calcined for 3 hours, the silica gel-based carbonyl sulfide hydrolysis catalyst 2 was obtained.

[0028] When using silica gel-based carbonyl sulfide hydrolysis catalyst 2 to remove COS, fill 0.5g of the catalyst in a (Φ6mm*120mm) fixed bed reactor, reaction conditions: temperature 85°C, space velocity 2000h -1 , COS concentration 100ppm. The COS hydrolysis activity is shown i...

Embodiment 3

[0032] (1) Slowly add 10g of coarse-porous silica gel to 20g of deionized water, hydrothermally treat it in a hydrothermal reactor at 80°C for 24h, take it out, and dry it in a vacuum oven at 60°C for 3h to obtain modified silica gel.

[0033] (2) Mix 5g modified silica gel in 5g 12% CH 3 Immerse in COOK solution at 25°C for 20 hours to obtain modified silica gel loaded with active components.

[0034] (3) The above-mentioned modified silica gel loaded with active components was vacuum-dried in a vacuum oven at 60° C. for 6 hours, and then calcined in a muffle furnace at 500° C. for 3 hours to obtain silica gel-based carbonyl sulfide hydrolysis catalyst 3 .

[0035] When using silica gel-based carbonyl sulfide hydrolysis catalyst 3 to remove COS, fill 0.5g of the catalyst in a (Φ6mm*120mm) fixed bed reactor, reaction conditions: temperature 85°C, space velocity 2000h -1 , COS concentration 100ppm. The COS hydrolysis activity is shown in Table 3 below.

[0036] table 3

[0...

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Abstract

The invention discloses a carbonyl sulfide hydrolysis catalyst taking modified silica gel as a carrier and a preparation method of the carbonyl sulfide hydrolysis catalyst, the carbonyl sulfide hydrolysis catalyst comprises the modified silica gel as the carrier and an active component loaded on the modified silica gel, and the mass percentage of the active component relative to the amount of themodified silica gel is 5-25%. The active component is any one or a combination of more than one of CH3COOLi, CH3COOCs, CH3COOK, Cs2CO3, Rb2CO3 and K2CO3. The carbonyl sulfide hydrolysis catalyst has the advantages that the diffusivity of H2S gas generated by hydrolysis is improved, sulfur deposition is reduced,the activity is relatively stable, the anti-toxicity performance is good, and the reaction temperature required by the catalyst is low.

Description

technical field [0001] The invention belongs to the technical field of desulfurization catalysts, in particular to a carbonyl sulfide hydrolysis catalyst with modified silica gel as a carrier and a preparation method thereof. Background technique [0002] Carbonyl sulfide (COS) is a common organic sulfur. In the process of producing chemical raw material gas from coal or petroleum, COS is the most important organic sulfur component in raw gas, which will corrode production equipment and is also a poison of many catalysts. It is one of the components that must be removed. At present, the most widely used COS removal technology at home and abroad is mainly hydrolysis. The carbonyl sulfide hydrolysis catalyst researched and developed mainly uses activated alumina as the main component, so that carbonyl sulfide can be converted into hydrogen sulfide under mild conditions as much as possible. Chinese patent CN1069673 discloses a catalyst for the hydrolysis of organic sulfur at r...

Claims

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Application Information

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IPC IPC(8): B01J31/04B01J27/232B01J37/02B01J37/10B01J37/08
CPCB01J27/232B01J31/04B01J37/0203B01J37/0207B01J37/08B01J37/10
Inventor 卞伯同徐骏刘经伟
Owner SINOPEC YANGZI PETROCHEM
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