Environment-friendly VOCs low-temperature combustion catalyst and preparation method thereof

An environmentally friendly, low-temperature combustion technology, applied in the field of resources and the environment, can solve problems such as poisoning and deactivation, chlorine poisoning catalysts, etc., and achieve the effects of enhancing reactivity, inhibiting erosion, and strengthening interactions

CN111686803AInactive Publication Date: 2020-09-22闫英辉
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
Publication Date
2020-09-22
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses an environment-friendly VOCs low-temperature combustion catalyst and a preparation method thereof. The preparation method comprises the following steps: preparing a mesoporouscerium-manganese composite oxide, synthesizing an ionic liquid precursor PyPS, and loading the mesoporous cerium-manganese composite oxide, a cerium-based solid ionic liquid composite carrier and an active component Ru. According to the prepared catalyst, the cerium-zirconium composite oxide with a mesoporous structure and cerium-based solid ionic liquid are used as carriers, precious metal Ru isused as an active component, the cerium-based solid ionic liquid is one of Ce < 0.33 > [PyPS] < 2 > PMo12O40, Ce < 0.66 > [PyPS] PMo12O40 and Ce < 0.33 > [PyPS] HPMo12O40, and the mass fraction of Ruin the catalyst is 2.0-5.0 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.
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Description

technical field

[0001] The invention belongs to the technical field of resources and environment, and relates to a VOCs catalyst, in particular to an environment-friendly VOCs low-temperature 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 important category of VOCs, mainly...

Examples

Embodiment 1

[0027] A preparation method of an environment-friendly VOCs low-temperature combustion catalyst is realized through the following specific steps:

[0028] (1) Preparation of mesoporous cerium-manganese composite oxides

[0029] Stir and mix the cerium nitrate solution and the manganese acetate 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, successively centrifuge, wash, dry, and then roast at 350°C 4h obtains mesoporous cerium-manganese composite oxide; the ratio of the amount of matter of said cerium nitrate and manganese acetate is 0.25:1, the addition of said urea is 10 times of the amount of total matter of cerium nitrate and manganese acetate, and said CTAB The addition of is the 5wt% of cerium nitrate and manganese acetate gross mass;

[0030] (2) Preparation of composite carrier

[0031] 1) Synthesis of ionic liquid precursor PyPS

[0032]Add 1,3-propane...

Embodiment 2

[0038] A preparation method of an environment-friendly VOCs low-temperature combustion catalyst is realized through the following specific steps:

[0039] (1) Preparation of mesoporous cerium-manganese composite oxides

[0040] Stir and mix the cerium nitrate solution and manganese acetate 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 hours, centrifuge, wash, and dry in sequence, and then roast at 400°C 3h obtains mesoporous cerium-manganese composite oxide; the ratio of the amount of matter of the cerium nitrate and manganese acetate is 1:1, the addition of the urea is 15 times of the total amount of matter of the cerium nitrate and manganese acetate, and the CTAB The addition of is 7 wt% of cerium nitrate and manganese acetate gross mass;

[0041] (2) Preparation of composite carrier

[0042] 1) Synthesis of ionic liquid precursor PyPS

[0043] Add 1,3-propane sult...

Embodiment 3

[0049] A preparation method of an environment-friendly VOCs low-temperature combustion catalyst is realized through the following specific steps:

[0050] (1) Preparation of mesoporous cerium-manganese composite oxides

[0051] Stir and mix the cerium nitrate solution and the manganese acetate 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 hours, successively centrifuge, wash, dry, and then roast at 450°C 2h obtains mesoporous cerium-manganese composite oxide; the ratio of the amount of matter of said cerium nitrate and manganese acetate is 4:1, the addition of said urea is 20 times of the amount of total matter of cerium nitrate and manganese acetate, and said CTAB The add-on is 9wt% of the total mass of cerium nitrate and manganese acetate;

[0052] (2) Preparation of composite carrier

[0053] 1) Synthesis of ionic liquid precursor PyPS

[0054] Add 1,3-propane sul...