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Water gas transfer reaction, water gas transfer catalyst, and method of preparing water gas transfer catalyst

A technology of water gas and catalyst, which is applied in the field of catalysts used in water gas shift reaction, and can solve the problems such as the decline of carbon monoxide conversion rate

Active Publication Date: 2014-08-27
IND TECH RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The carbon monoxide conversion rate will decrease under long-term reaction

Method used

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  • Water gas transfer reaction, water gas transfer catalyst, and method of preparing water gas transfer catalyst
  • Water gas transfer reaction, water gas transfer catalyst, and method of preparing water gas transfer catalyst
  • Water gas transfer reaction, water gas transfer catalyst, and method of preparing water gas transfer catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] 20g of zirconia cerium was added to the platinum solution (Pt(NO 2 ) 2 (NH 3 ) 2 solution, containing 0.3g platinum), heated to 120°C and maintained for 5 hours to remove the solvent, and then heated to 500°C for 2 hours to obtain a platinum-coated zirconia-cerium catalyst, wherein the weight of zirconia-cerium and platinum The ratio is 100:1.5.

[0027] Take 6.25g of zirconia-cerium catalyst covered with platinum on the surface, mix it with 4.25g of zirconia powder, then add 2g of aluminum colloidal powder, adjust the solid content of the above mixture to about 49% with 13g of water, grind to form a slurry, adjust The viscosity of the slurry is between 10 and 100cP (the viscosity of the slurry is measured by a rotary viscometer), and the slurry is coated on a 400 hole / square inch (cells / in) with a diameter of 2 cm and a length of 4 cm. 2 ) ceramic honeycomb carrier (a cylinder with a diameter of 2 cm, a length of 4 cm, and a total volume of the catalyst of 12.6 cub...

Embodiment 2

[0029]Similar to Example 1, the only difference is that the platinum solution contains 0.4g of platinum, so that the weight ratio of zirconia-cerium oxide to platinum in the platinum-coated zirconium-cerium oxide catalyst is 100:2. In the catalyst finally coated on the pore surface of the honeycomb carrier, platinum accounted for about 1.0% by weight in the catalyst coating layer on the surface of the honeycomb carrier.

Embodiment 3

[0031] Similar to Example 1, the only difference is that the platinum solution contains 0.5 g of platinum, so that the weight ratio of zirconia-cerium oxide to platinum in the platinum-coated zirconium-cerium oxide catalyst is 100:2.5. In the catalyst finally coated on the pore surface of the honeycomb carrier, platinum accounted for about 1.25% by weight in the catalyst coating layer on the surface of the honeycomb carrier.

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Abstract

The invention relates to a water gas transfer reaction, a water gas transfer catalyst, and a method of preparing the water gas transfer catalyst. The water gas transfer catalyst provided by the invention comprises, by weight, 100 parts of metal oxide carrier, the metal oxide carrier carrying platinum on the surface and the weight ratio of the metal oxide carrier and platinum being 100:0.1 to 100: 10; and 10 to 120 parts of zirconium oxide filler, the zirconium oxide filler carrying no platinum and being dispersed with the metal oxide carrier, wherein the metal oxide carrier is composed of cerium oxide or cerium zirconium oxide.

Description

technical field [0001] This invention relates to catalysts, and more particularly to catalysts for water gas shift reactions. Background technique [0002] Polymer thin film fuel cell (PEMFC) is likely to be used in future stationary household power generation systems and electric vehicles, and its fuel is hydrogen-rich gas with a carbon monoxide concentration lower than 20ppm. Generally, the hydrogen-rich reformed gas produced by reforming hydrocarbons has a carbon monoxide concentration of about 8-15%. It needs to reduce the carbon monoxide concentration to below 1% through the water gas shift reaction (WGS) as shown in formula 1, and then selectivity The oxidation or methanation reaction reduces the residual carbon monoxide concentration to less than 20 ppm. [0003] h 2 O+CO→CO 2 +H 2 (Formula 1) [0004] The traditional WGS catalyst is Cu-ZnO / Al 2 o 3 , its reaction temperature range is narrow, it needs to be activated, and it cannot be exposed to air or heat-res...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/63C01B3/16
CPCY02P20/52
Inventor 李盈杰李秋煌
Owner IND TECH RES INST
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