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Sulfur-containing organic waste gas catalytic oxidation catalyst and preparation method thereof

A technology for catalytic oxidation and organic waste gas, applied in the direction of physical/chemical process catalysts, molecular sieve catalysts, chemical instruments and methods, etc., can solve the problems of inability to achieve efficient oxidation of organic sulfur and high cost

Active Publication Date: 2021-05-18
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] CN105992633A discloses a catalytic oxidation system for gas containing hydrogen sulfide, which uses a combination of non-precious metal catalysts and noble metal catalysts to achieve H 2 S, COS and CS 2 Oxidation of organic sulfur can be achieved above 320°C / 360°C, but non-precious metal catalysts cannot achieve efficient oxidation of organic sulfur, and need to be combined with noble metal catalysts, the cost is relatively high
But in this invention, catalytic incineration catalyst is less than 90% to organic sulfur conversion rate under the condition of relatively high concentration organic sulfur, needs to improve

Method used

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  • Sulfur-containing organic waste gas catalytic oxidation catalyst and preparation method thereof
  • Sulfur-containing organic waste gas catalytic oxidation catalyst and preparation method thereof
  • Sulfur-containing organic waste gas catalytic oxidation catalyst and preparation method thereof

Examples

Experimental program
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Embodiment 1

[0031] (1) Dissolve ammonium metavanadate in oxalic acid solution, wherein the mass ratio of ammonium metavanadate to oxalic acid is 1:5, and the concentration of ammonium metavanadate is 1.15mol / L. The equal volume of SSZ-13 molecular sieve was impregnated in the active component precursor solution, dried at 100°C for 4 hours, and calcined at 500°C for 4 hours to obtain a composite powder, in which the active component accounted for 15% of the mass of the compound.

[0032] (2) Dilute nitric acid with a pH of 1.5, pseudoboehmite powder, anatase titanium dioxide, methyl cellulose, and deionized water were prepared into a slurry at a mass ratio of 50:25:30:2:100, and ball milled for 15 hours , the honeycomb ceramic carrier was immersed in the coating slurry for 2 minutes, dried at 100°C for 4 hours, and fired at 500°C for 4 hours to obtain a honeycomb carrier coated with titania-alumina coating, wherein the mass of titania accounted for the honeycomb carrier 5%, the mass of alu...

Embodiment 2

[0035] The preparation method of this example is the same as that of Example 1, except that the concentration of ammonium metavanadate in step (1) is 1.5 mol / L. Based on the mass of the honeycomb carrier, the content of SSZ-13 molecular sieve is 2%, and the content of active components in terms of vanadium pentoxide is 0.48%.

Embodiment 3

[0037] The preparation method of this example is the same as that of Example 1, except that the concentration of ammonium metavanadate in step (1) is 0.8 mol / L. Based on the mass of the honeycomb carrier, the content of SSZ-13 molecular sieve is 2%, and the content of active components in terms of vanadium pentoxide is 0.15%.

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Abstract

The invention relates to a sulfur-containing organic waste gas catalytic oxidation catalyst and a preparation method thereof. The surface of a honeycomb carrier is coated with an aluminum oxide-titanium oxide composite coating, then the honeycomb carrier is soaked in composite slurry, and the composite slurry is prepared after an SSZ-13 molecular sieve loads an active component. According to the catalyst, sulfur-containing organic matters in waste gas can be efficiently converted into sulfur dioxide, the SO2 selectivity is high, and the adverse effect of organic sulfides on the subsequent technological process is avoided.

Description

technical field [0001] The invention belongs to the technical field of waste gas treatment, and in particular relates to a sulfur-containing organic waste gas catalytic oxidation catalyst and a preparation method thereof. Background technique [0002] Volatile organic pollutants (VOCs) are one of the typical air pollutants, which have a serious impact on the environment and human health. There are also volatile sulfur-containing compounds such as hydrogen sulfide, sulfide, mercaptan, and carbonyl sulfide in the sulfur-containing organic waste gas, accompanied by a foul smell, which is very harmful to people's production and life. The purification methods of organic waste gas include adsorption, absorption, regenerative combustion and other methods, among which catalytic oxidation is an efficient removal method. However, catalysts are susceptible to poisoning by sulfur-containing compounds (including organic sulfur and inorganic sulfur) under the condition of sulfur-containi...

Claims

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Application Information

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IPC IPC(8): B01J29/78B01D53/86B01D53/48
CPCB01J29/78B01D53/8603B01J2229/18Y02A50/20
Inventor 王泉汪鹏王学海王宽领刘淑鹤赵磊
Owner CHINA PETROLEUM & CHEM CORP
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