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Molecular sieve coating load manganese based composite oxide integrated catalyst and preparation method thereof

A technology of composite oxides and monolithic catalysts, applied in molecular sieve catalysts, physical/chemical process catalysts, separation methods, etc., can solve the problems of scarce precious metal resources, high prices, and high manufacturing costs, and achieve low manufacturing costs, high-temperature activity, and Not easy to fall off effect

Inactive Publication Date: 2012-04-11
ZHEJIANG NORMAL UNIVERSITY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a molecular sieve coating-loaded manganese-based composite oxide monolithic catalyst with easy-to-obtain raw materials and low manufacturing cost and its Manufacturing method

Method used

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  • Molecular sieve coating load manganese based composite oxide integrated catalyst and preparation method thereof
  • Molecular sieve coating load manganese based composite oxide integrated catalyst and preparation method thereof
  • Molecular sieve coating load manganese based composite oxide integrated catalyst and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Weigh 15.79g of 50% Mn(NO 3 ) 2 solution, 2.30g Cu(NO 3 ) 2 ·3H 2 O. 2.89g Silicalite-1 molecular sieve, add 6.86g water, stir to form a slurry, and then apply the slurry to a size of 50mm×25mm×40mm, with an opening rate of 195cell / in 2 , On the cordierite honeycomb ceramics with a mass of 30.2g, blow out the residual liquid in the honeycomb channel. At this time, there is still a part of the slurry remaining. Air the cordierite honeycomb ceramics at room temperature until the surface is dry, and then dry at 120°C for 1 hour, and then in the muffle Baking in a furnace at 500°C for 1 hour. Repeat the above impregnation, drying, and calcination twice, the last calcination temperature is 500°C, and calcination is performed for 4 hours to obtain the monolithic catalyst of the present invention.

[0020] The prepared monolithic catalyst is made into a cylindrical shape, packed in a fixed-bed catalytic combustion reactor, and the catalytic combustion of toluene or ethyl ...

Embodiment 2

[0022] Weigh 15.82g of 50% Mn(NO 3 ) 2 solution, 2.29g Cu(NO 3 ) 2 ·3H 2 O, 2.91g H-ZSM-5, 11.16g citric acid, 1.18g polyethylene glycol, add 9.92g water, stir to form a slurry, and then apply the slurry to a size of 50mm×25mm×40mm, with a porosity of 195cell / in 2 , On the cordierite honeycomb ceramics with a mass of 30.2g, blow out the residual liquid in the honeycomb channel. At this time, there is still a part of the slurry remaining. Air the cordierite honeycomb ceramics at room temperature until the surface is dry, and then dry at 120°C for 1 hour, and then in the muffle Baking in a furnace at 500°C for 1 hour. Repeat the above impregnation, drying, and calcination twice, the last calcination temperature is 500°C, and calcination is performed for 4 hours to obtain the monolithic catalyst of the present invention.

[0023] The catalytic combustion effects of the prepared monolithic catalyst on toluene and ethyl acetate are shown in Table 1 and Table 2, respectively. ...

Embodiment 3

[0025] Weigh 15.76g of 50% Mn(NO 3 ) 2 solution, 2.26g Cu(NO 3 ) 2 ·3H 2 O, 2.93g TS-1, 11.62g citric acid, 1.19g polyethylene glycol, add 9.90g water, stir to form a slurry, and then apply the slurry to a size of 50mm×25mm×40mm, with an opening ratio of 195cell / in 2 , On the cordierite honeycomb ceramics with a mass of 30.5g, blow out the residual liquid in the honeycomb channel. At this time, there is still a part of the slurry remaining. Air the cordierite honeycomb ceramics at room temperature until the surface is dry, and then dry at 120°C for 1 hour, and then in the muffle Baking in a furnace at 500°C for 1 hour. Repeat the above impregnation, drying, and calcination twice, the last calcination temperature is 800°C, and calcination is performed for 4 hours to obtain the monolithic catalyst of the present invention.

[0026] The catalytic combustion effects of the prepared monolithic catalyst on toluene and ethyl acetate are shown in Table 1 and Table 2, respective...

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Abstract

The invention provides a molecular sieve coating load manganese based composite oxide integrated catalyst with easy material acquisition, low preparation cost and firm combination of active constituents and carrier of catalyst, and a preparation method thereof for the defects that the noble metal catalyst has few noble metal resources, high price and high preparation cost. The catalyst provided by the invention is a cellular catalytic combustion catalyst, which comprises a molecular sieve coating, a manganese based composite oxide and a cellular carrier. The catalyst provided by the invention is prepared by the following steps of: uniformly mixing a precursor with the manganese based composite oxide, the molecular sieve and the water to obtain a grout with manganese based composite oxide precursor; soaking the cellular carrier into the grout with manganese based composite oxide precursor; and drying and baking to obtain the molecular sieve coating load manganese based composite oxide integrated catalyst.

Description

technical field [0001] The invention relates to the technical field of environmental protection, in particular to a molecular sieve coating-loaded manganese-based composite oxide monolithic catalyst for exhaust gas treatment and a manufacturing method thereof. Background technique [0002] Volatile organic compounds (VOCs) and nitrogen oxides (NO x ) Exhaust gas is the main source of air pollution. One of the most effective elimination methods for VOCs is the catalytic combustion method. The catalytic combustion of VOCs is a typical gas-solid catalytic reaction, which is essentially a complete catalytic oxidation reaction, that is, under the action of a catalyst, the harmful hydrocarbons in the exhaust gas are converted into harmless carbon dioxide at a lower temperature without flame and water. The research and development of catalytic combustion of organic waste gas takes the research and development of catalyst as the key technology. According to different active comp...

Claims

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Application Information

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IPC IPC(8): B01J29/48B01J29/89B01J29/00B01D53/56B01D53/72B01D53/86
Inventor 谢云龙郭航鸣钟依均林惠琳朱康琴郑盼聪
Owner ZHEJIANG NORMAL UNIVERSITY
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