Method for preparing catalyst for catalytic combustion of methane

A methane catalytic combustion and catalyst technology, applied in physical/chemical process catalysts, chemical instruments and methods, catalyst activation/preparation, etc., can solve the problems of high catalytic temperature, low catalytic efficiency, long preparation period, etc., and achieve good catalytic activity. , the effect of high catalytic activity and short preparation period

Inactive Publication Date: 2015-06-17
裴振昭
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to solve the shortcomings of the current methane catalytic combustion catalyst, such as long preparation c

Method used

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  • Method for preparing catalyst for catalytic combustion of methane
  • Method for preparing catalyst for catalytic combustion of methane
  • Method for preparing catalyst for catalytic combustion of methane

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] (1) Preparation of cerium oxide / ferric oxide / cobalt oxide (CeO 2 / Fe 2 o 3 / Co 2 o 3 ) carrier:

[0022] Weigh 20-32g, 2.5-3.49g, 0.5-1.44g of cerium nitrate, ferric nitrate and cobalt nitrate respectively, add them into 150ml of distilled water, stir well to obtain mixed salt solution A, and then add 6-10g of Urea (the urea is excessive) is reacted in a closed system, the temperature is 60°C-140°C, and the reaction time is 3-6h. After the reaction, the reactor was naturally cooled to room temperature, and the precipitate was taken out, washed, dried at 105°C for 3 hours, and then calcined at 450°C for 2 hours to obtain a mixed catalyst carrier of various metal oxides.

[0023] (2) Preparation of palladium impregnation solution

[0024] Prepare Pd(NO 3 ) 2 solution, take 0.5mlPd(NO 3 ) 2 solution, add distilled water to 3-6ml, and stir well.

[0025] (3) Loading of active components

[0026] Grind the catalyst carrier prepared in step (1), weigh 6 g of the s...

Embodiment 2

[0030] (1) Preparation of cerium oxide / ferric oxide / cobalt oxide (CeO 2 / Fe 2 o 3 / Co 2 o 3 ) carrier:

[0031] Weigh cerium nitrate, ferric nitrate and cobalt nitrate to be 20~32g, 2.5~3.49g, 0.5~1.44g respectively, add into 150ml distilled water, stir well, obtain mixed salt solution A, then add 10g urea ( Where urea is excessive), react in a closed system, the temperature is 60°C-140°C, and the reaction time is 3-6h. After the reaction, the reactor was naturally cooled to room temperature, and the precipitate was taken out, washed, dried at 105°C for 3 hours, and then calcined at 450°C for 2 hours to obtain a mixed catalyst carrier of various metal oxides. where CeO 2 , Fe 2 o 3 and Co 2 o 3 The contents are respectively 90%, 6%, 4%.

[0032] (2) Preparation of palladium impregnation solution

[0033] Prepare Pd(NO 3 ) 2 solution, take 0.5mlPd(NO 3 ) 2 Solution, add distilled water to 6ml, stir well.

[0034] (3) Loading of active components

[0035] Grind...

Embodiment 3

[0039] (1) Preparation of cerium oxide / ferric oxide / cobalt oxide (CeO 2 / Fe 2 o 3 / Co 2 o 3 ) carrier:

[0040] Weighing cerium nitrate, ferric nitrate and cobalt nitrate respectively are 32g, 3.49g, 1.44g, join in 150ml distilled water, stir, obtain mixed salt solution A, then add 10g urea (wherein urea is excessive) in solution, in React in a closed system, the temperature is 60°C-140°C, and the reaction time is 3-6h. After the reaction, the reactor was naturally cooled to room temperature, and the precipitate was taken out, washed, dried at 105°C for 3 hours, and then calcined at 450°C for 2 hours to obtain a mixed catalyst carrier of various metal oxides. where CeO 2 , Fe 2 o 3 and Co 2 o 3 The contents are respectively 92%, 5%, 3%.

[0041](2) Preparation of palladium impregnation solution

[0042] Prepare Pd(NO 3 ) 2 solution, take 1ml of Pd(NO 3 ) 2 Solution, add distilled water to 6ml, stir well.

[0043] (3) Loading of active components

[0044] Grin...

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Abstract

The present invention relates to a method for preparing a catalyst for catalytic combustion of methane, and belongs to the field of inorganic material preparation, particularly to a method for co-preparation of a catalyst for catalytic combustion of methane through a hydrothermal method and an impregnating method. The method is characterized in that the catalyst carrier is cerium-iron-cobalt composite oxide, wherein the cerium content is 90-96%, the iron content is 3-7%, the cobalt content is 3-5%, and the active component is palladium and accounts for 0.5-2% of the total catalyst. The catalyst preparation method comprises: (1) preparing a cerium oxide/ferric oxide/cobalt oxide (CeO2/Fe2O3/Co2O3) carrier through a hydrothermal method, and (2) preparing a palladium nitrate (Pd(NO3)2) solution, impregnating the catalyst carrier prepared in the step (1) in the palladium nitrate solution, standing, drying, and calcining to prepare the catalyst finished product. The catalyst has advantages of short preparation period, high methane catalysis efficiency, low catalysis temperature, good aging resistance, and the like.

Description

field of invention [0001] The invention relates to a method for preparing a methane catalytic combustion catalyst, in particular to a method for jointly preparing a methane catalytic combustion catalyst by a hydrothermal method and an impregnation method. Background technique [0002] Commonly known as "gas", coalbed methane is mainly composed of methane, which is associated with coal. Its calorific value is 2 to 5 times that of coal, and it is very clean after burning, with almost no waste gas. It can be widely used in industry and residential life. If the coalbed methane is not utilized and directly discharged into the atmosphere, the resulting greenhouse effect is approximately CO 2 21 times of that, which has seriously affected the ecological environment and is contrary to "energy saving and emission reduction". Therefore, it is very important to make full use of coalbed methane. [0003] However, the flame adiabatic temperature of traditional methane flame combustion ...

Claims

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Application Information

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IPC IPC(8): B01J23/89B01J37/02C10L10/00
Inventor 裴振昭
Owner 裴振昭
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