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Ferric hydroxide loaded rhodium-based catalyst and preparation and application thereof

An iron hydroxide and catalyst technology, applied in chemical instruments and methods, hydrogen, hydrogen separation and other directions, can solve the problems of complex preparation process, excessive particle size, Cl ion poisoning, etc., and achieves improved catalyst activity, simple preparation process, The effect of improving utilization

Inactive Publication Date: 2015-06-10
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, due to the limitations of traditional preparation methods, such defects as excessive particle size, Cl ion poisoning, complex preparation process, and long cycle make the activity of some rhodium catalysts not high enough, and the application of rhodium catalysts is therefore limited to a certain extent.
However, with the discovery and development of new technologies for the preparation of various catalysts, the research on the preparation of rhodium catalysts is far from over, but the invention of an efficient and environmentally friendly supported rhodium catalyst for the elimination of trace CO in hydrogen sources Not yet reported

Method used

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  • Ferric hydroxide loaded rhodium-based catalyst and preparation and application thereof
  • Ferric hydroxide loaded rhodium-based catalyst and preparation and application thereof
  • Ferric hydroxide loaded rhodium-based catalyst and preparation and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] 3.78g of Fe(NO 3 ) 3 9H 2 O with 0.1wt% RhCl 3 ·3H 2 Add 2.02 g of O solution to 100 ml of ethylene glycol aqueous solution (ethylene glycol: water = 3: 1), then ultrasonically disperse and mix evenly, and add dropwise to 100 ml of 0.3 mol / L NaOH solution under strong stirring, and adjust the pH value to 8. Co-precipitation is formed, continue to stir at 80°C for 3h, stand still for 1h, filter, wash with hot water, place at 80°C for 12h to dry the catalyst, and obtain 0.2%Rh / Fe(OH) x catalyst.

Embodiment 2

[0029] 3.78g of Fe(NO 3 ) 3 9H 2 O with 0.10wt% RhCl 3 ·3H 2 Add 9.98g of O solution to 100ml of ethylene glycol aqueous solution (ethylene glycol: water = 3: 1), and then ultrasonically disperse and mix evenly, then add dropwise to 100ml of 0.3mol / L NaOH solution under strong stirring, and adjust the pH value to 8. Co-precipitation is formed, continue to stir at 80°C for 3h, stand still for 1h, filter, wash with hot water, place at 80°C for 12h to dry the catalyst, and obtain 1%Rh / Fe(OH) x catalyst.

Embodiment 3

[0031] 3.78g of Fe(NO 3 ) 3 9H 2 O with 0.1wt% RhCl 3 ·3H 2Add 20.01 g of O solution to 100 ml of ethylene glycol aqueous solution (ethylene glycol: water = 3: 1), then ultrasonically disperse and mix evenly, and add dropwise to 100 ml of 0.3 mol / L NaOH solution under strong stirring, and adjust the pH value to 8. Co-precipitation is formed, continue to stir at 80°C for 3h, stand still for 1h, filter, wash with hot water, place at 80°C for 12h to dry the catalyst, and obtain 2%Rh / Fe(OH) x catalyst.

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Abstract

The invention relates to a loading type small grain-size rhodium (Rh)-based catalyst and preparation and application thereof. Specifically, the rhodium-based catalyst is prepared by adopting a coprecipitation method, precious metal Rh is highly dispersed on a ferric hydroxide carrier, the grain size of the Rh is less than 1nm, wherein Rh accounts for 0.2-5% of the catalyst in total mass. The catalyst disclosed by the invention adopts the elimination of trace CO in reformed hydrogen source such as fuel batteries as the application background, is suitable for water-vapor conversion and CO selected oxidizing reaction in a rich-hydrogen atmosphere, is capable of achieving water-vapor conversion reaction under 300 DEG C with the CO conversion rate being higher than 98%, and capable of completely converting the trace CO into CO2 in the rich-hydrogen atmosphere under the room temperature condition.

Description

technical field [0001] The present invention relates to a rhodium (Rh)-based catalyst with a small particle size (average particle size of 1 nm) and its preparation and application, in particular to a catalyst through water-gas shift (WGS) and CO oxidation (PROX) in a hydrogen-rich atmosphere Ferric hydroxide-supported Rh catalyst for eliminating trace CO in reformed gas hydrogen source and its preparation and application. Background technique [0002] Hydrogen energy is recognized as a clean energy source and is emerging as a low-carbon and zero-carbon energy source. In recent years, my country, the United States, Japan, Canada, and the European Union have formulated hydrogen energy development plans, and have made progress in many aspects. In the near future, they are expected to become one of the leading countries in hydrogen energy technology and applications, and are also recognized by the It is recognized as the country most likely to take the lead in realizing the ind...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/89C01B3/58C01B3/16
CPCY02P20/52
Inventor 关红玲王晓东林坚李林张涛
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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