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Quaternary composite oxide catalyst for degrading VOCs (volatile organic compounds) and preparation method of quaternary composite oxide catalyst

A technology of composite oxides and oxides, applied in the direction of metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, chemical instruments and methods, etc., can solve the problems of increasing the cost of precious metal catalysts, and achieve industrial applications The effect of good prospect, high activity and low ignition temperature

Inactive Publication Date: 2016-11-16
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, its preparation process requires the use of PdCl 2 Treatment of FeCrAl gauze, which increases the cost of this precious metal catalyst

Method used

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  • Quaternary composite oxide catalyst for degrading VOCs (volatile organic compounds) and preparation method of quaternary composite oxide catalyst
  • Quaternary composite oxide catalyst for degrading VOCs (volatile organic compounds) and preparation method of quaternary composite oxide catalyst
  • Quaternary composite oxide catalyst for degrading VOCs (volatile organic compounds) and preparation method of quaternary composite oxide catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] (1) Weigh 4.26g of Cu(NO 3 ) 2 ·3H 2 O, 1.49g of Ce(NO 3 ) 3 ·6H 2 O, 2.26g of Zr(NO 3 ) 4 ·5H 2 O, measure 11.47g of Mn(NO 3 ) 2 Solution (mass fraction is 50%), was added to 50mL deionized water, stirred and dissolved;

[0026] (2) Get 1g of acrylic acid and add it to the solution obtained in (1) to obtain a uniform viscous liquid;

[0027] (3) Apply the viscous liquid obtained in (2) evenly on the cordierite, and dry;

[0028] (4) Calcining the cordierite carrier obtained in (3) at 700° C. for 3 h to prepare a Cu-Mn-Ce-Zr-cordierite composite oxide monolithic catalytic combustion catalyst.

[0029] It was determined that the loading capacity of the prepared monolithic catalyst was 25%. Among them, Cu accounts for 7% of the cordierite mass, Mn accounts for 11% of the cordierite mass, Ce accounts for 3% of the cordierite mass, and Zr accounts for 3% of the cordierite mass.

[0030] In the tubular furnace reactor, evaluate the catalytic activity of the cata...

Embodiment 2

[0032] (1) Weigh 2.01g of Cu(CH 3 COO) 2 ·H 2 O, 0.65g of Ce 2 (SO 4 ) 3 ·8H 2 O, 0.92g of Zr(CH 3 COO) 4 and 17.13g of Mn(CH 3 COO) 2 4H 2 O was added to 50mL deionized water, stirred and dissolved;

[0033] (2) Get 2g of acrylic acid and join the solution obtained in (1) to obtain a uniform viscous liquid;

[0034] (3) Apply the viscous liquid obtained in (2) evenly on the cordierite, and dry;

[0035] (4) Calcining the cordierite carrier obtained in (3) at 300° C. for 10 h to prepare a Cu-Mn-Ce-Zr-cordierite composite oxide monolithic catalytic combustion catalyst.

[0036] It was determined that the loading capacity of the prepared monolithic catalyst was 20%. Among them, Cu accounts for 2.5% of the cordierite mass, Mn accounts for 15% of the cordierite mass, Ce accounts for 1% of the cordierite mass, and Zr accounts for 1% of the cordierite mass.

[0037] The catalytic activity of the catalyst was evaluated in a tube furnace reactor, GHSV=30000h -1 . The r...

Embodiment 3

[0039] (1) Weigh 4.19g of CuSO 4 ·5H 2 O, 5.09g of 2(NH 4 ) 2 SO 4 · Ce(SO 4 ) 2 4H 2 O, 4.51g of ZrO(NO 3 ) 2 and 4.89g of MnSO 4 , added to 50mL deionized water, stirred to dissolve;

[0040] (2) Get 3g of hydroxymethylcellulose and join the solution obtained in (1) to obtain a uniform viscous liquid;

[0041] (3) Apply the viscous liquid obtained in (2) evenly on the cordierite, and dry;

[0042] (4) Calcining the cordierite carrier obtained in (3) at 500° C. for 5 h to prepare a Cu-Mn-Ce-Zr-cordierite composite oxide monolithic catalytic combustion catalyst.

[0043]It was determined that the loading capacity of the prepared monolithic catalyst was 17%. Among them, Cu accounts for 3% of the cordierite mass, Mn accounts for 5% of the cordierite mass, Ce accounts for 3% of the cordierite mass, and Zr accounts for 5% of the cordierite mass.

[0044] The catalytic activity of the catalyst was evaluated in a tube furnace reactor, GHSV=30000h -1 . The reactant con...

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Abstract

The invention relates to a chemical catalyst and a preparation technique thereof, and aims to provide a quaternary composite oxide catalyst for degrading VOCs (volatile organic compounds) and a preparation method of the quaternary composite oxide catalyst. The catalyst is a Cu-Mn-Ce-Zr-cordierite composite metal oxide monolithic catalyst prepared by a loading method, and the loading capacity of active components of the catalyst is 5%-25%. The catalyst comprises an oxide of transition metal copper and an oxide of transition metal manganese, as main active components, and an oxide of a rare-earth element cerium and an oxide of transition metal zirconium, as aids, wherein the mass ratio of cordierite to Cu to Mn to Ce to Zr is 100% to (0.5-7%) to (2-15%) to (0.5-5%) to (0.5-5%). The prepared catalyst disclosed by the invention can degrade various VOCs, is high in activity and low in ignition temperature, is a monolithic catalyst, and is high in mechanical strength and long in service life. Transition metal elements are used, so that the cost is low, and the industrial application prospects are good.

Description

technical field [0001] The invention belongs to the technical field of chemical catalysts and their preparation, and in particular relates to a rare earth metal-modified transition metal-based four-way catalytic combustion catalyst for degrading VOCs and a preparation method thereof. Background technique [0002] In recent years, with the rapid development of industries such as synthetic leather, automobiles, color steel and motor vehicle manufacturing, a large amount of VOCs (volatile organic compounds) have been produced. VOCs not only pollute water bodies, soil and the atmosphere, but also have a high contribution rate to the formation of smog, which is harmful to human health and has attracted widespread attention. The "Volatile Organic Compounds Pollutant Discharge Pilot Measures" jointly formulated and issued by the Ministry of Finance, the National Development and Reform Commission, and the Ministry of Environmental Protection has been implemented since October 1, 201...

Claims

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Application Information

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IPC IPC(8): B01J23/889
CPCB01J23/002B01J23/8892B01J2523/00B01J2523/17B01J2523/3712B01J2523/48B01J2523/72
Inventor 赵伟荣李雅君陈梦霞
Owner ZHEJIANG UNIV
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