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Catalyst grading method for catalytic oxidation of sulfur-containing VOCs, and method for catalytic oxidation of sulfur-containing VOCs

A catalytic oxidation and catalyst technology, applied in the field of VOCs treatment, can solve the problems of low efficiency, single layout, high investment cost, and achieve the effect of reducing the cost of use

Pending Publication Date: 2021-08-06
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to overcome the shortcomings of single catalyst layout, low efficiency, high energy consumption and high investment cost in the treatment of VOCs in the prior art. One of the purposes of the present invention is to provide a catalytic oxidation of sulfur-containing VOCs Catalyst grading method, which can improve the treatment efficiency of sulfur-containing VOCs and reduce the cost of catalyst use

Method used

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  • Catalyst grading method for catalytic oxidation of sulfur-containing VOCs, and method for catalytic oxidation of sulfur-containing VOCs
  • Catalyst grading method for catalytic oxidation of sulfur-containing VOCs, and method for catalytic oxidation of sulfur-containing VOCs
  • Catalyst grading method for catalytic oxidation of sulfur-containing VOCs, and method for catalytic oxidation of sulfur-containing VOCs

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Effect test

Embodiment 1

[0073] The mixed reaction gas obtained by mixing sulfur-containing VOCs with oxygen-containing gas passes through five catalyst beds in series, and under the conditions of catalytic oxidation reaction, it is contacted with the catalyst. According to the order of contact with the mixed reaction gas, the five The catalyst beds in series are the desulfurization bed, the first catalyst bed, the second catalyst bed, the third catalyst bed and the fourth catalyst bed;

[0074] Wherein, the desulfurizer filled in the desulfurization bed is a honeycomb desulfurizer (Cpsi value is 300) with ZnO as the main active component, and the contact reaction conditions carried out in the bed are that the space velocity of the reaction is 3000h -1 , the reaction temperature is 310°C;

[0075] The first catalyst filled in the first catalyst bed is granular Co 2 o 3 Catalyst, the contact reaction condition that carries out in this bed layer is, the space velocity of reaction is 6000h -1 , the re...

Embodiment 2

[0086] The mixed reaction gas obtained after mixing sulfur-containing VOCs with oxygen-containing gas (the volume fraction of oxygen is 2%) passes through four catalyst beds in series, and under the conditions of catalytic oxidation reaction, the contact reaction with the catalyst is carried out. According to the mixed reaction The contact sequence of the reactor, the four catalyst beds in series are the desulfurization bed, the first catalyst bed, the second catalyst bed and the third catalyst bed;

[0087] Wherein, the desulfurizer filled in the desulfurization bed is a honeycomb desulfurizer (Cpsi value is 300) with ZnO as the main active component, and the contact reaction conditions carried out in the bed are that the space velocity of the reaction is 3000h -1 , the reaction temperature is 310°C;

[0088] The first catalyst filled in the first catalyst bed is a honeycomb ceramic catalyst (Cpsi value is 300) with Pt as the main active component, and the contact reaction co...

Embodiment 3

[0096] The mixed reaction gas obtained by mixing sulfur-containing VOCs with oxygen-containing gas passes through four catalyst beds in series, and under the conditions of catalytic oxidation reaction, it is contacted with the catalyst. According to the order of contact with the mixed reactor, the four The catalyst beds in series are successively the first catalyst bed, the second catalyst bed, the third catalyst bed, and the fourth catalyst bed;

[0097] Wherein, the desulfurizer filled in the desulfurization bed is a honeycomb desulfurizer (Cpsi value is 300) with ZnO as the main active component, and the contact reaction conditions carried out in the bed are that the space velocity of the reaction is 2500h -1 , the reaction temperature is 350°C;

[0098] The first catalyst filled in the first catalyst bed is a honeycomb ceramic catalyst (Cpsi value is 400) with Co as the main active component, and the contact reaction conditions carried out in this bed are that the space ve...

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Abstract

The invention relates to the technical field of VOCs treatment, and concretely relates to a catalyst grading method for catalytic oxidation of sulfur-containing VOCs, and a method for catalytic oxidation of sulfur-containing VOCs. The catalyst grading method for catalytic oxidation of sulfur-containing VOCs comprises the following steps: mixing sulfur-containing VOCs with an oxygen-containing gas to obtain a mixed reaction gas, and enabling the mixed reaction gas to pass through n catalyst bed layers connected in series according to the contact sequence of the mixed reaction gas and the catalyst bed layers, wherein the n catalyst bed layers connected in series are a desulfurization bed layer, a first catalyst bed layer,..., an (n-1)th catalyst bed layer in sequence, and n is greater than or equal to 3. Different types of catalysts are subjected to hierarchical matching application, so that multi-component VOCs materials can be efficiently removed in a layered manner, the use cost of the catalyst is reduced, and meanwhile, the method has the characteristic of efficient fine removal.

Description

technical field [0001] The invention relates to the technical field of VOCs treatment, in particular to a catalyst gradation method for catalytic oxidation of sulfur-containing VOCs and a method for catalytic oxidation of sulfur-containing VOCs. Background technique [0002] With the increasingly stringent national standards for the emission of VOCs and their characteristic pollutants, the catalytic oxidation (CO) method for the end treatment of low-concentration VOCs is widely used by enterprises. The catalytic oxidation method is generally used at the end of the recovery method to treat low-concentration VOCs exhaust gas that is difficult to treat with the VOCs recovery method. [0003] Low-concentration VOCs components are still relatively complex, usually including small molecular alkanes with low boiling points that are difficult to be oxidized efficiently. At the same time, hydrogen sulfide and some organic sulfides that poison the catalyst will inevitably exist in the...

Claims

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Application Information

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IPC IPC(8): B01D53/86B01D53/44B01D53/48B01D53/52B01J23/42B01J23/75B01J23/89B01J35/04
CPCB01D53/8687B01D53/869B01D53/8603B01J23/8913B01J23/75B01J23/42B01D53/8612B01D2257/708B01D2257/306B01D53/002B01D53/0407B01D53/0438B01D53/0454B01D2253/106B01D2253/108B01D2259/40086B01D2259/40094B01J35/56Y02A50/20
Inventor 尹树孟于辉单晓雯程龙军陶彬
Owner CHINA PETROLEUM & CHEM CORP
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