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Supported-palladium catalyst used for methane combustion and preparation method for supported-palladium catalyst

A palladium catalyst, methane combustion technology, applied in combustion methods, combustion types, incinerators, etc., can solve the problems of reducing fuel utilization efficiency, air pollution, and high working temperature

Inactive Publication Date: 2015-09-23
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Methane is the most stable hydrocarbon, it is usually difficult to activate or oxidize, and the catalytic combustion of methane has a high temperature, and the CO, NOx and incompletely burned hydrocarbons produced during the combustion reaction will cause air pollution, and the methane Incomplete combustion also reduces fuel efficiency

Method used

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Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment 1

[0018] Specific Example 1: Weigh 21.9g of crystalline tin tetrachloride and 21.25g of sodium nitrate, dissolve them in 150mL of deionized water, stir the solution for 30min until completely dissolved to colorless and transparent, then heat under reflux under vigorous stirring to obtain White precipitate, then washed with deionized water to be free of Cl - , after drying at 120°C, calcined at 600°C in the air for 4h to obtain the carrier SnO 2 . Impregnation of SnO with equal volume of palladium acetate solution 2 , after the impregnation is completed, it is dried at 55°C and baked at 600°C for 4h to obtain SnO 2 Loaded palladium catalyst, the weight content of Pd is 0.15%.

Embodiment 2

[0019] Embodiment 2: Prepare carrier SnO with embodiment 1 2 . Under stirring conditions, the prepared SnO was impregnated with a known concentration of cerium nitrate solution. 2 , at 80 oC Stir in a water bath and evaporate to dryness, after 110 oC dry, 600 oC Ceria-modified SnO was obtained after calcination for 4 h 2 . Equal volume impregnation of ceria-modified SnO with palladium acetate solution 2 , after the impregnation was completed, it was dried at 55°C and calcined at 600°C for 4 hours to obtain a supported palladium catalyst with a weight content of 0.15% of Pd and 5% of cerium.

Embodiment 3

[0020] Example 3: The cerium nitrate solution in Example 2 was changed to potassium nitrate solution, and the rest of the steps were the same to prepare a supported palladium catalyst, the weight content of Pd was 0.15%, and the K content was 0.1%.

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Abstract

The invention relates to a supported-palladium catalyst used for methane combustion and a preparation method for the supported-palladium-loaded catalyst. The catalyst is characterized in that an active ingredient is noble metal palladium, an auxiliary is a rear-earth oxide, an alkali metal oxide or an alkali metal oxide and a carrier is tin oxide, wherein the content of the palladium accounts for 0.1-5 percent of the catalyst; the content of the rear-earth oxide is 3-10 percent; and the content of the alkali metal or alkali metal oxide is 0.01-2 percent. The supported-palladium catalyst disclosed by the invention can be used for catalytic combustion of ultralow-concentration methane, and has the characteristics of high activity and strong stability.

Description

technical field [0001] The invention designs a supported palladium catalyst for methane combustion and its preparation method, which belongs to the field of catalyst preparation and its application. Specifically, tin oxide prepared by the reaction of crystalline tin tetrachloride and sodium nitrate is used as a carrier, and palladium is used as a precious metal. Active metal catalysts for the catalytic combustion reaction of methane. Background technique [0002] Methane is the most stable hydrocarbon, it is usually difficult to activate or oxidize, and the catalytic combustion of methane works at a high temperature, the CO, NOx and incompletely burned hydrocarbons produced during the combustion reaction will cause air pollution, and the methane Incomplete combustion also reduces fuel efficiency. Therefore, the development of high-efficiency, stable and high-temperature sintering-resistant methane low-temperature catalytic combustion catalysts has aroused great interest of ...

Claims

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Application Information

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IPC IPC(8): B01J23/62B01J23/63F23G7/07
Inventor 郭耘王博伟卢冠忠王丽郭杨龙詹望成王艳芹王筠松刘晓晖
Owner EAST CHINA UNIV OF SCI & TECH
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