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Sulfur-resistant VOCs low-temperature catalytic combustion catalyst and preparation method thereof

A low-temperature catalysis and catalyst technology, which is applied in the field of resources and the environment, can solve the problems of catalyst chlorine poisoning, etc., and achieve the effects of enhancing reactivity, strengthening interaction, and inhibiting erosion

Inactive Publication Date: 2020-09-22
闫英辉
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Aiming at the problem that the moisture and sulfur dioxide content in the traditional flue gas is high and the catalyst is prone to chlorine poisoning in the catalytic oxidation process of chlorobenzene and trichlorethylene, the present invention discloses a catalyst for the low-temperature catalytic combustion of sulfur-resistant VOCs and a preparation method thereof. Mesoporous iron-zirconium composite oxide coated with iron-based solid-state ionic liquid as a carrier, a catalyst for the catalytic purification of chlorobenzene and trichlorethylene under low temperature conditions with noble metal Ru as the active component

Method used

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  • Sulfur-resistant VOCs low-temperature catalytic combustion catalyst and preparation method thereof
  • Sulfur-resistant VOCs low-temperature catalytic combustion catalyst and preparation method thereof

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Effect test

Embodiment 1

[0026] A method for preparing a catalyst for sulfur-resistant VOCs low-temperature catalytic combustion is achieved through the following specific steps:

[0027] (1) Preparation of mesoporous iron-zirconium composite oxide

[0028]Stir and mix the ferric nitrate solution and the zirconium oxynitrate solution at room temperature for 10 minutes, add urea and CTAB and continue to stir for 25 minutes, then treat the resulting mixed solution at 85°C for 24 hours, centrifuge, wash, and dry in sequence, and then place it at 400°C Roasting for 6h to obtain a mesoporous iron-zirconium composite oxide; the ratio of the amount of iron nitrate to zirconyl nitrate is 0.5:1, and the amount of urea added is 10 times the total amount of iron nitrate and zirconyl nitrate , the addition of the CTAB is 6wt% of the total mass of ferric nitrate and zirconyl nitrate; the molar concentration of ferric nitrate solution is 0.2 mol / L, and the molar concentration of zirconyl nitrate solution is 0.4 mol...

Embodiment 2

[0039] A method for preparing a catalyst for sulfur-resistant VOCs low-temperature catalytic combustion is achieved through the following specific steps:

[0040] (1) Preparation of mesoporous iron-zirconium composite oxide

[0041] Stir and mix the ferric nitrate solution and the zirconium oxynitrate solution at room temperature for 20 minutes, add urea and CTAB and continue to stir for 35 minutes, then treat the resulting mixed solution at 95 °C for 12 h, successively centrifuge, wash, and dry, and then at 600 °C Roasting for 4h to obtain mesoporous iron-zirconium composite oxide; the ratio of the amount of iron nitrate and zirconyl nitrate is 2:1, and the amount of urea added is 20 times of the total amount of iron nitrate and zirconyl nitrate , the addition of the CTAB is 8wt% of the total mass of ferric nitrate and zirconyl nitrate; the molar concentration of the ferric nitrate solution is 0.4 mol / L, and the molar concentration of the zirconyl nitrate solution is 0.2 mol / ...

Embodiment 3

[0052] A method for preparing a catalyst for sulfur-resistant VOCs low-temperature catalytic combustion is achieved through the following specific steps:

[0053] (1) Preparation of mesoporous iron-zirconium composite oxide

[0054] Stir and mix the ferric nitrate solution and the zirconium oxynitrate solution at room temperature for 15 minutes, add urea and CTAB and continue to stir for 30 minutes, then treat the resulting mixed solution at 90 °C for 18 h, successively centrifuge, wash, and dry, and then in 500 °C Roasting for 5h to obtain mesoporous iron-zirconium composite oxide; the ratio of the amount of iron nitrate and zirconyl nitrate is 1:1, and the amount of urea added is 15 times the total amount of iron nitrate and zirconyl nitrate , the addition of the CTAB is 7wt% of the total mass of ferric nitrate and zirconyl nitrate; the molar concentration of the ferric nitrate solution is 0.3 mol / L, and the molar concentration of the zirconyl nitrate solution is 0.3 mol / L; ...

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Abstract

The invention discloses a sulfur-resistant VOCs low-temperature catalytic combustion catalyst and a preparation method thereof. The preparation method comprises the following steps: preparing a mesoporous iron-zirconium composite oxide, preparing an ionic liquid precursor H5PMo10V2O40, synthesizing an ionic liquid precursor TEAPS, preparing a mesoporous iron-zirconium composite oxide loaded iron-based solid ionic liquid composite carrier, and loading an active component Ru to obtain the catalyst. According to the catalyst, mesoporous iron-zirconium composite oxide with the surface coated withiron-based solid ionic liquid serves as a carrier, Ru serves as an active component, the active component is loaded through a deposition precipitation method, and the mass fraction of Ru in the catalyst ranges from 2.0 wt% to 5.0 wt%. The catalyst prepared in the invention can completely catalyze and convert chlorobenzene and trichloroethylene into carbon dioxide, water and HCl at a low temperature, and has high reaction stability.

Description

technical field [0001] The invention belongs to the technical field of resources and environment, and relates to a VOCs catalytic oxidation technology, in particular to a sulfur-resistant VOCs low-temperature catalytic combustion catalyst and a preparation method thereof. Background technique [0002] VOCs emissions from industrial sources in my country involve many industries, and the types, concentrations, and working conditions of VOCs emitted by different industries vary widely. Even for the same industry, due to differences in production materials and process technologies, the types and concentrations of VOCs emitted also vary greatly. Therefore, it is difficult to use a single process technology to control the emission of VOCs from all industrial sources. It is necessary to formulate appropriate control strategies and technical paths according to the emission characteristics of different industries. [0003] Chlorine-containing volatile organic compounds are an importa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/02B01J27/199B01J35/00B01D53/86B01D53/70F23G7/07
CPCB01J31/0279B01J31/0285B01J31/0294B01J31/0298B01J27/199B01D53/8662F23G7/07B01J35/391
Inventor 闫英辉
Owner 闫英辉
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