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Catalyst for CO normal temperature catalytic oxidation and preparation method thereof

A catalytic oxidation and catalyst technology, which is applied in the field of environmental pollution control, can solve the problem of inferior catalytic activity, and achieve the effect of strong interaction, good water resistance, stability, and close contact

Inactive Publication Date: 2011-05-18
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This is also the fundamental reason why the catalytic activity of supported Pt / Pd catalysts is inferior to that of supported Au catalysts.

Method used

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  • Catalyst for CO normal temperature catalytic oxidation and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] 1g (0.0025M) Fe (NO 3 ) 3 9H 2 O, 0.022g (0.0000942M) Pd (NO 3 ) 2 , 1g of citric acid, 1g of alumina mixed in 20ml of deionized water, placed in a water bath at 80°C, stirred and evaporated until foaming, then dried at 100°C for 2h, roasted at 550°C for 2h, 55°C with 10% H 2 After reduction for 30min, the desired catalyst was obtained.

Embodiment 2

[0028] 0.342g (0.00085M) Fe (NO 3 ) 3 9H 2 O, 0.022g (0.0000942M) Pd (NO 3 ) 2 , 1g of citric acid, 1g of alumina mixed in 20ml of deionized water, placed in a water bath at 80°C, stirred and evaporated until foaming, then dried at 100°C for 2h, roasted at 550°C for 2h, 55°C with 10% H 2 After reduction for 30min, the desired catalyst was obtained.

Embodiment 3

[0030] 1g (0.0025M) Fe (NO 3 ) 3 9H 2 O, 0.022g (0.0000942M) Pd (NO 3 ) 2 , 0.88g of citric acid and 1g of alumina were mixed in 20ml of deionized water, placed in a water bath at 80°C, stirred and evaporated until it gelled slightly, and then placed in an oil bath at 150°C to foam. After foaming, dry at 100°C for 2 hours, bake at 550°C for 2 hours, and bake at 70°C with 10% H 2 After reduction for 30min, the desired catalyst was obtained.

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Abstract

The invention relates to a catalyst for CO normal temperature catalytic oxidation and a preparation method thereof, belonging to the technical field of pollution control. The catalyst comprises the active components of palladium and one or more of transition metal (iron, cerium, cobalt, manganese, copper, lanthanum, nickel and molybdenum) oxides; a catalyst carrier is an active aluminum oxide and is prepared by adopting a citric acid method; and the prepared catalyst has better catalysis activity and stability. The transfer temperature of the 20 percent of CO is -9 DEG C, the transfer temperature of the 50 percent of CO is 5 DEG C, and the transfer temperature of the 100 percent of CO is 25 DEG C.

Description

1. Technical field [0001] The invention belongs to the technical field of environmental pollution control, and relates to a composition of a catalyst used for catalytic oxidation of CO at normal temperature and a preparation method thereof. 2. Background technology: [0002] As we all know, carbon monoxide (CO) is a flammable, explosive and toxic compound. The incomplete combustion of hydrocarbons, the chemical industry, and the use of motor vehicles all cause a large amount of CO emissions; at the same time, the gas in mines and the emissions of household gas stoves Gas, etc. also contain a large amount of CO gas. Therefore, the application of low (normal) temperature catalytic oxidation of CO has also attracted widespread attention, such as automobile exhaust purification, filter self-rescuer and fire self-rescue respirator, closed internal cycle CO 2 Gas purification in lasers, CO gas sensors, tobacco damage reduction, and the elimination of trace CO in closed systems (s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/89B01D53/62B01D53/86
CPCY02A50/20
Inventor 张志刚蔡丽莉卢冠忠郭耘詹望成郭杨龙王筠松杨青山
Owner EAST CHINA UNIV OF SCI & TECH
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