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A kind of composite catalyst, preparation method and application of catalytic oxidation vocs

A composite catalyst, catalytic oxidation technology, applied in the direction of metal/metal oxide/metal hydroxide catalyst, physical/chemical process catalyst, chemical instrument and method, etc., can solve the problem that the activity cannot reach the noble metal oxide catalyst, catalytic oxidation temperature High cost, high cost, etc., to achieve the effect of simple and controllable preparation method

Active Publication Date: 2022-01-11
JIANGSU ZHONGKE RUISAI POLLUTION CONTROL ENG +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] For noble metal oxide catalysts, the cost is higher, and the catalytic oxidation temperature of existing metal oxides is higher, and at high space velocity (>6000h -1 ), the activity cannot reach the level of noble metal oxide catalysts and needs to be further improved

Method used

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  • A kind of composite catalyst, preparation method and application of catalytic oxidation vocs
  • A kind of composite catalyst, preparation method and application of catalytic oxidation vocs
  • A kind of composite catalyst, preparation method and application of catalytic oxidation vocs

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0058] 1.801g Mn(CH 3 COO) 2 4H 2 O and 0.531g Ce(CH 3 COO) 3 1.5H 2 Dissolve O together in 10mL of deionized water to prepare a mixed solution; add 5.0g of 60 mesh Al to the mixed solution 2 o 3 Particles, oscillated at 50°C, impregnated with 300W ultrasonic for 25 minutes, dried at 110°C for 8 hours, and calcined at 600°C for 7 hours to obtain solid particles;

[0059] Place solid particles in a fixed bed, heat the bed to 200°C, -1 The hydrogen was purged for 60 min to prepare the Ce-Mn composite catalyst for catalytic oxidation of VOCs.

Embodiment 2～6

[0067] The cerium acetate Ce(CH 3 COO) 3 1.5H 2 O, manganese acetate Mn(CH 3 COO) 2 4H 2 O and lanthanum acetate La(CH 3 COO) 3 ·6H 2 Dissolve O together in 10mL of deionized water to prepare a mixed solution; add 5.0g of 60 mesh Al to the mixed solution 2 o 3 Particles, oscillated at 50°C, impregnated with 300W ultrasonic for 25 minutes, dried at 110°C for 8 hours, and calcined at 600°C for 7 hours to obtain solid particles;

[0068] Place solid particles in a fixed bed, heat the bed to 200°C, -1 The hydrogen purging of 60min, the preparation of catalytic oxidation of VOCs La 1-x Ce x MnO 3 ;

[0069] For the addition of cerium acetate, manganese acetate or lanthanum acetate, according to the molecular formula La 1-x Ce x MnO 3 The values ​​of x are different, and they are added separately, and the value of x is 0 (LaMnO 3 ), 2.5% (La 0.975 Ce 0.025 MnO 3 ), 5.0% (La 0.95 Ce 0.05 MnO 3 ), 7.5% (La 0.925 Ce 0.075 MnO 3 ), 10.0% (La 0.9 Ce 0.1 MnO 3...

Embodiment 7～14

[0076] 1.801g Mn(CH 3 COO) 2 4H 2 O and 0.531g Ce(CH 3 COO) 3 1.5H 2 Dissolve O together in 10mL of deionized water to prepare a mixed solution; add 5.0g of 60 mesh Al to the mixed solution 2 o 3 Particles, oscillating at a constant temperature of 50°C and impregnated with 300W ultrasonic for 25 minutes, dried at 110°C for 8 hours, and calcined at a specific calcination temperature for 7 hours to obtain solid particles;

[0077] Place solid particles in a fixed bed, heat the bed to 200°C, -1 Hydrogen purging for 60min to prepare a Ce-Mn composite catalyst that catalyzes the oxidation of VOCs;

[0078]The calcination temperatures are respectively 300°C, 400°C, 500°C, 600°C, 700°C, 800°C, and 900°C.

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Abstract

The invention relates to a composite catalyst for catalyzing the oxidation of VOCs. The composite catalyst uses a metal base and / or a ceramic base with an ordered mesoporous structure as a carrier, and at least one transition metal oxide is loaded on it as an active component. The above-mentioned transition metals are non-noble metal elements. The present invention obtains the composite catalyst by controlling the valence state of the transition metal element of the composite catalyst that catalyzes the oxidation of VOCs, realizes the low-temperature catalytic oxidation of VOCs, and catalyzes the purification of T 90 (The catalytic temperature of 90% purification rate) can reach 148° C. at the lowest; the preparation method of the composite catalyst for catalytic oxidation of VOCs provided by the present invention is simple and controllable.

Description

technical field [0001] The invention belongs to the field of oxidation of volatile gases, and specifically relates to a composite catalyst for catalytic oxidation of VOCs, a preparation method and an application, in particular to a composite catalyst for catalytic oxidation of VOCs at a low temperature, a preparation method and an application, in particular to a composite catalyst that does not catalyze oxidation of VOCs Composite catalyst containing noble metal elements for catalytic oxidation of VOCs at low temperature, preparation method and application. Background technique [0002] Volatile Organic Compounds (Volatile Organic Compounds, referred to as VOCs) refer to organic compounds with a saturated vapor pressure greater than 70Pa at room temperature and a boiling point lower than 260°C at normal pressure. These volatile substances are used in petrochemical, pharmaceutical, and printing industries. , paint decoration industry, surface anticorrosion and other industrie...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/34B01D53/86B01D53/72
CPCB01D53/8668B01J23/002B01J23/34B01D2257/708B01D2255/2073B01D2255/2063B01D2255/2065B01D2255/207B01D2255/40B01D2255/20769B01J2523/00B01J2523/31B01J2523/3712B01J2523/3706B01J2523/72
Inventor 岳仁亮齐丛亮
Owner JIANGSU ZHONGKE RUISAI POLLUTION CONTROL ENG
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