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Composite catalyst for catalytically oxidizing VOCs, preparation method and uses thereof

A composite catalyst, catalytic oxidation technology, applied in metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, chemical instruments and methods, etc. The problems of high cost and high cost are achieved, and the effect of the preparation method is simple and controllable.

Active Publication Date: 2017-08-29
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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  • Composite catalyst for catalytically oxidizing VOCs, preparation method and uses thereof
  • Composite catalyst for catalytically oxidizing VOCs, preparation method and uses thereof
  • Composite catalyst for catalytically oxidizing VOCs, preparation method and uses thereof

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, -1Hydrogen 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 present invention relates to a composite catalyst for catalytically oxidizing VOCs. According to the composite catalyst, a metal base and / or a ceramic base having an ordered mesoporous structure is adopted as a carrier, at least a transition metal oxide is supported on the carrier as an active component, and the transition metal is a non-noble metal element. According to the present invention, the composite catalyst is obtained by controlling the valence state of the transition metal element of the composite catalyst, such that the low temperature catalytic oxidation of VOCs is achieved, and the minimum T90 (the catalysis temperature of the 90% purification rate) for catalytic purification of benzene can achieve 148 DEG C; and the preparation method 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 Applications(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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