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Catalyst for low-temperature catalytic oxidation of VOCs and preparation method thereof

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

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

AI Technical Summary

Problems solved by technology

[0005] Catalyst prone to chlorine poisoning and moisture and SO in traditional flue gas during catalytic oxidation of chlorobenzene and trichlorethylene 2 The high content together causes the problem of catalyst poisoning and deactivation. The invention discloses a catalyst for low-temperature catalytic oxidation of VOCs and its preparation method. The combination of manganese-zirconium composite oxide with a mesoporous structure and a zirconium-based solid ionic liquid is used as a carrier. Catalytic Purification of Chlorobenzene and Trichlorethylene Using Noble Metal Ru as Active Component at Low Temperature

Method used

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  • Catalyst for low-temperature catalytic oxidation of VOCs and preparation method thereof
  • Catalyst for low-temperature catalytic oxidation of VOCs and preparation method thereof
  • Catalyst for low-temperature catalytic oxidation of VOCs and preparation method thereof

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Embodiment 1

[0026] A preparation method of a catalyst for low-temperature catalytic oxidation of VOCs is achieved through the following steps:

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

[0028] Stir and mix the manganese acetate solution and the zirconium oxynitrate solution at room temperature for 10 minutes, add urea and PVP and continue to stir for 25 minutes, then treat the resulting mixed solution at 85°C for 24 hours, then centrifuge, wash, and dry in sequence, and then place at 350 ℃ roasting for 6h to obtain mesoporous manganese-zirconium composite oxide; the ratio of the amount of manganese acetate and zirconyl nitrate is 0.5:1, and the amount of urea added is 10% of the total amount of manganese acetate and zirconyl nitrate times, the addition of the PVP is 4 wt% of the total mass of manganese acetate and zirconyl nitrate, the concentration of the manganese acetate solution is 0.15mol / L manganese acetate solution, and the concentration of the zir...

Embodiment 2

[0037] A method for preparing a catalyst for low-temperature catalytic oxidation of VOCs is achieved through the following steps:

[0038] (1) Preparation of mesoporous manganese-zirconium composite oxide

[0039] Stir and mix the manganese acetate solution and the zirconium oxynitrate solution at room temperature for 20 minutes, add urea and PVP and continue to stir for 35 minutes, then treat the resulting mixed solution at 95°C for 12 hours, then centrifuge, wash, and dry in sequence, and then place it at 450 ℃ roasting for 3h to obtain mesoporous manganese-zirconium composite oxide; the ratio of the amount of manganese acetate and zirconyl nitrate is 2:1, and the amount of urea added is 15% of the total amount of manganese acetate and zirconyl nitrate. times, the addition of the PVP is 6wt% of the total mass of manganese acetate and zirconyl nitrate; the concentration of the manganese acetate solution is 0.3 mol / L, and the concentration of the zirconyl nitrate solution is 0...

Embodiment 3

[0048] A method for preparing a catalyst for low-temperature catalytic oxidation of VOCs is achieved through the following steps:

[0049] (1) Preparation of mesoporous manganese-zirconium composite oxide

[0050] Stir the manganese acetate solution and the zirconium oxynitrate solution at room temperature for 15 min, add urea and PVP and continue stirring for 30 min, then treat the resulting mixed solution at 90 °C for 18 h, then centrifuge, wash, and dry in sequence, and then Roasting at 400°C for 5 h to obtain a mesoporous manganese-zirconium composite oxide; the ratio of the amount of manganese acetate to zirconyl nitrate is 1:1, and the amount of urea added is the total amount of manganese acetate and zirconyl nitrate 13 times of the amount, the addition of the PVP is 5wt% of the total mass of manganese acetate and zirconyl nitrate, the concentration of the manganese acetate solution is 0.2 mol / L, and the concentration of the zirconyl nitrate solution is 0.2 mol / L ;

[...

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Abstract

The invention discloses a catalyst for low-temperature catalytic oxidation of VOCs and a preparation method thereof. The preparation method comprises the following steps: preparing a mesoporous manganese-zirconium composite oxide, synthesizing an ionic liquid precursor NMMPS, preparing a mesoporous manganese-zirconium composite oxide loaded zirconium-based solid ionic liquid composite carrier, andloading an active component Ru to obtain the catalyst. According to the catalyst, the manganese-zirconium composite oxide with a mesoporous structure is combined with zirconium-based solid ionic liquid to serve as a carrier, precious metal Ru is used as an active component, and the zirconium-based solid ionic liquid is one of Zr < 0.25 > [NMMPS] < 2 > PW < 12 > O < 40 >, Zr < 0.5 > [NMMPS] < 12 >O < 40 > and Zr < 0.25 > [NMMPS] < H > PW < 12 > O < 40 >. The catalyst can completely catalyze and convert chlorobenzene and trichloroethylene into carbon dioxide, water and HCl under a relatively low temperature condition, and has relatively 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 low-temperature catalytic oxidation VOCs 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 important category of VOC...

Claims

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Application Information

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IPC IPC(8): B01J31/02B01J27/188B01J35/00B01D53/86B01D53/70
CPCB01J31/0282B01J31/0285B01J31/0294B01J31/0298B01J27/188B01D53/8662B01J35/391
Inventor 闫英辉
Owner 闫英辉
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