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Methanol self-heating recapitalization perovskite honeycomb ceramic integral catalyzer and method for preparing the same

A technology of a monolithic catalyst and a honeycomb ceramic carrier, applied in the field of methanol autothermal reforming hydrogen production catalyst and its preparation, can solve problems such as perovskite composite oxides that have not yet been found, achieve high catalytic activity and stability, and control reaction hotspots , the effect of easy replacement

Inactive Publication Date: 2008-01-30
HANERGY TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] So far, no perovskite composite oxides have been found to be used in the oxidation reforming of methanol to produce hydrogen

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0033] Example 1: Preparation of La 0.2 Ce 0.8 CrO 3 Perovskite powder

[0034] (1) Weigh nitrate and complexing agent according to the ratio of target composite oxide, so that La: Ce: Cr=0.2:0.8:1, while (La+Ce+Cr):EDTA:Citirc Acid=1:1: 1;

[0035] (2) EDTA and Citric Acid are mixed and dissolved in ammonia water, and the stoichiometric ratio of acid radical and ammonia water is 1:1 to obtain a complex solution;

[0036] (3) adding nitrate in the complexing solution, heating and dissolving, stirring, allowing it to cool naturally to room temperature, adding ammoniacal liquor to the complexing solution after cooling, and adjusting the pH to 6;

[0037] (4) Control the temperature in a water bath at 80°C, stir, and concentrate the complex solution until a gel is formed; then dry the gel at 120°C for 10 hours;

[0038] (5) The gel roasting procedure is as follows: the temperature is raised from room temperature to 400°C for 1 hour and kept for 1 hour; then the temperature i...

example 2

[0039] Example 2 prepares La 0.2 SM 0.8 CrO 3 Perovskite powder

[0040] (1) Weigh nitrate and complexing agent according to the target composite oxide ratio, so that La:Sm:Cr=0.2:0.8:1, while (La+Sm+Cr):EDTA:Citirc Acid=1:1: 1;

[0041] (2) EDTA and Citric Acid are mixed and dissolved in ammonia water, and the stoichiometric ratio of acid radical and ammonia water is 1:1 to obtain a complex solution;

[0042] (3) adding nitrate to the complexing solution, heating and dissolving, stirring, allowing it to cool naturally to room temperature, adding ammoniacal liquor to the complexing solution after cooling, and adjusting the pH to 6;

[0043] (4) Control the temperature in a water bath at 60°C, stir, concentrate the complex solution until a gel is formed; then dry the gel at 120°C for 18 hours;

[0044] (5) The gel roasting procedure is as follows: heating from room temperature for 1 hour to 400°C and maintaining for 1 hour; heating from 400°C for 2 hours to 900°C and maintai...

example 3

[0045] Example 3: Preparation of La 0.2 Ce 0.8 Zn 0.8 Cr 0.2 o 3 Perovskite powder

[0046] (1) Weigh nitrate and complexing agent according to the target composite oxide ratio, so that La: Ce: Zn: Cr=0.2: 0.8: 0.8: 0.2, while (La+Ce+Zn+Cr): EDTA: Citirc Acid=1:1:1;

[0047] (2) EDTA and Citric Acid are mixed and dissolved in ammonia water, and the stoichiometric ratio of acid radical and ammonia water is 1:1 to obtain a complex solution;

[0048] (3) adding nitrate to the complexing solution, heating and dissolving, stirring, allowing it to cool naturally to room temperature, adding ammoniacal liquor to the complexing solution after cooling, and adjusting the pH to 6;

[0049] (4) Control the temperature in a water bath at 90°C, stir, and concentrate the complex solution until a gel is formed; then dry the gel at 120°C for 24 hours;

[0050] (5) The gel roasting procedure is as follows: heating from room temperature for 1 hour to 400°C and maintaining for 1 hour; heati...

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Abstract

The invention discloses a carbinol spontaneous heating reforming perovskite honeycomb ceramic monolith catalyst and the preparation method thereof. The invention belongs to catalyst manufacture technical field. The general chemical formula of the catalyst is A1-xA'Xb1-yB'O3(x is more than or equal to 0 and less than or equal to 1, y is more than or equal to 0 and less than or equal to 1), wherein, the A and A' are the rare earth metals La, Ce, Pr and Gd; The B and B' are the transition metals Cr, Zr, Zn, Ni, Co and Mn. The catalyst is prepared by the sol-gel method; generally the nitrate is added into the citric acid ammonium solution or EDTA citric acid ammonium solution and is complex by adjusting the pH value; the gel is generated by dehydration in temperature-constant water bath and is then dried in the oven for 24 hours under the temperature of 120 DEG C, and the perovskite oxide powder is obtained after pre-roasting and roasting. The powder is grinded into material slurry by a ball mill and is then dipped and brushed on the honeycomb ceramic surface, and the carbinol spontaneous heating reforming perovskite honeycomb ceramic monolith catalyst is prepared after roasting. The invention has the advantages of high conversion of carbinol spontaneous heating reforming, long service life, simple preparation process, anti-vibration, small resistance and easy replacement of the structural catalyst, etc.

Description

technical field [0001] The invention relates to a methanol autothermal reforming hydrogen production catalyst for supplying hydrogen fuel to a fuel cell and a preparation method thereof, belonging to the technical field of catalysts and preparation thereof. Background technique [0002] Fuel cells, especially proton exchange membrane fuel cells (PEMFC) are entering the stage of quasi-commercialization. The ideal fuel is pure hydrogen, but so far, the fuel supply of fuel cells is still a bottleneck restricting its commercial application. From fossil fuels, such as methanol, natural gas, dimethyl ether, gasoline, and diesel, hydrogen supply to fuel cells after reforming is considered to be one of the most realistic ways to solve the hydrogen fuel supply of fuel cells. [0003] Methanol reforming hydrogen production technology has received extensive attention due to its small reforming system volume, less reformed gas components, mild reforming reaction conditions, low methanol...

Claims

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Application Information

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IPC IPC(8): B01J23/26B01J23/10H01M4/90
CPCY02E60/50
Inventor 肖钢侯晓峰周帅林崔冰冰
Owner HANERGY TECH
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