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Catalyst with function of purifying methylbenzene in air and preparation method thereof

A technology for purifying air and catalysts, which is applied in the field of catalysts for catalytic purification of toluene in the air and its preparation field, which can solve the problems of poor moisture resistance and high reaction temperature, achieve high thermal stability, improve the effect of not easy to lose, and promote the reaction process of toluene

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] In order to solve the problems of high reaction temperature and poor moisture resistance of catalytic oxidation removal of toluene, the invention discloses a catalyst with the function of purifying toluene in the air and a preparation method thereof. Combining ionic liquids as a carrier and noble metal Pd as an active component can completely catalyze the conversion of toluene into carbon dioxide and water at a relatively low temperature, and exhibit excellent moisture resistance

Method used

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  • Catalyst with function of purifying methylbenzene in air and preparation method thereof

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Effect test

Embodiment 1

[0029] A kind of preparation method of the catalyst with purifying toluene function in air is realized by following steps:

[0030] (1) Preparation of cerium-iron composite oxide

[0031] Mix ferric nitrate solution and cerium sulfate solution at room temperature for 10 minutes, then add urea and CTAB and continue stirring for 30 minutes, treat the resulting mixed solution at 80°C for 24 hours, centrifuge, wash and dry the obtained product at 400°C Roasting treatment 6h; The ratio of the amount of substance of the iron nitrate and cerium sulfate is 0.25:1, the addition of the urea is 10 times of the total amount of the substance of the iron nitrate and cerium sulfate, the addition of the CTAB is nitric acid 5wt% of the total weight of iron and cerium sulfate; the molar concentration of ferric nitrate solution is 0.1mol / L, and the molar concentration of cerium sulfate solution is 0.4mol / L;

[0032] (2) Synthesis of ionic liquid precursor TEAPS

[0033] Add 1,3-propane sultone a...

Embodiment 2

[0039] A kind of preparation method of the catalyst with purifying toluene function in air is realized by following steps:

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

[0041] Mix ferric nitrate solution and cerium sulfate solution at room temperature for 20 minutes, then add urea and CTAB and continue stirring for 30 minutes, treat the resulting mixed solution at 90°C for 12 hours, centrifuge, wash, and dry the obtained product at 500°C Roasting treatment 4h; The ratio of the amount of the substance of the iron nitrate and cerium sulfate is 4:1, the addition of the urea is 20 times of the total amount of the substance of the iron nitrate and the cerium sulfate, and the addition of the CTAB is nitric acid 10wt% of the total weight of iron and cerium sulfate; the molar concentration of ferric nitrate solution is 0.4mol / L, and the molar concentration of cerium sulfate solution is 0.1mol / L;

[0042] (2) Synthesis of ionic liquid precursor TEAPS

[0043] Add 1,3-prop...

Embodiment 3

[0049] A kind of preparation method of the catalyst with purifying toluene function in air is realized by following steps:

[0050] (1) Preparation of cerium-iron composite oxide

[0051] Mix ferric nitrate solution and cerium sulfate solution at room temperature for 15 minutes, then add urea and CTAB and continue to stir for 30 minutes, treat the resulting mixed solution at 85°C for 18 hours, centrifuge, wash, and dry the obtained product at 450°C Roasting treatment for 5h; the ratio of the amount of iron nitrate and cerium sulfate is 1:1, the amount of urea added is 15 times that of the total amount of matter of iron nitrate and cerium sulfate, and the amount of CTAB added is nitric acid 7 wt% of the total weight of iron and cerium sulfate; the molar concentration of ferric nitrate solution is 0.25 mol / L, and the molar concentration of cerium sulfate solution is 0.25 mol / L;

[0052] (2) Synthesis of ionic liquid precursor TEAPS

[0053] Add 1,3-propane sultone and p-xylene...

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Abstract

The invention discloses a catalyst with a function of purifying methylbenzene in air and a preparation method thereof. The catalyst is obtained through preparation of a cerium-iron composite oxide, synthesis of an ionic liquid precursor TEAPS, preparation of the cerium-iron composite oxide and an iron-based solid ionic liquid composite carrier and loading of an active component Pd. According to the catalyst, the cerium-iron composite oxide and the iron-based solid ionic liquid are combined to be used as a carrier, the catalyst is obtained by compounding noble metal Pd serving as an active component, the mass fraction of Pd in the catalyst is 2.0 to 5.0 weight percent, the iron-based solid ionic liquid is one of Fe < 0.33 > [TEAPS] < 2 > PMo12O40, Fe < 0.66 > [TEAPS] < PMo12O40 and Fe < 0.33 > [TEAPS] < HPMo12O40. The catalyst prepared by the method can completely catalyze and convert toluene into carbon dioxide and water at a relatively low temperature, and shows excellent moisture resistance.

Description

technical field [0001] The invention belongs to the technical field of environmental protection, and relates to a technology for purifying toluene in air, in particular to a catalyst for catalytic purification of toluene in air and a preparation method thereof. Background technique [0002] Indoor is one of the most frequent and intimate environments that people come into contact with, and its quality directly affects people's health. The U.S. Environmental Protection Agency has listed indoor air pollution as one of the five major environmental factors that endanger public health. Volatile organic compounds are an important part of indoor air pollutants, which have the characteristics of diversity, potentiality, comprehensiveness, extensiveness and accumulation. The sources of VOCs in indoor air can be divided into indoor sources and outdoor sources. The outdoor sources mainly come from petrochemical and other industrial emissions, fuel combustion and automobile exhaust; th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/02B01J27/19B01J35/00B01D53/86B01D53/72
CPCB01J31/0279B01J31/0285B01J31/0294B01J31/0298B01J27/19B01D53/8668B01J35/391
Inventor 闫英辉
Owner 闫英辉
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