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Cu-based low-temperature water gas conversion catalyst under hydrogen rich reformed gas and preparation method thereof

A technology for converting catalysts and catalysts, which is applied in catalyst activation/preparation, metal/metal oxide/metal hydroxide catalysts, chemical instruments and methods, etc., and can solve the problem of insufficient conversion efficiency, narrow active temperature range, and high activation temperature. problem, to achieve the effect of strong interaction, high copper dispersion and low activation temperature

Inactive Publication Date: 2011-06-15
FUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, compared with the requirements of proton membrane fuel cells, there are still defects such as narrow active temperature range, high activation temperature and insufficient conversion efficiency.

Method used

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  • Cu-based low-temperature water gas conversion catalyst under hydrogen rich reformed gas and preparation method thereof
  • Cu-based low-temperature water gas conversion catalyst under hydrogen rich reformed gas and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Embodiment 1: preparation catalyst CuO / ZrO 2

[0031] Preparation of ZrO 2 Carrier: Take 60mL of 0.2g / mL ZrOCl 2 ·8H 2 Put O aqueous solution into 100mL high-pressure polytetrafluoroethylene lining, then put the inner lining into the stainless steel outer lining, screw it tightly, and put it into the blast drying oven. At 150°C, heat for 6h. After the hydrothermal kettle is lowered to room temperature, pour out the emulsion in the lining, add 25% concentrated ammonia water dropwise to the emulsion, adjust the pH of the system to 9, then centrifuge and wash the precipitate with water for 5 times, and use AgNO 3 Detection without Cl - until. The resulting precipitate was dried at 80°C for 6h, and then fired in a muffle furnace at 350°C for 6h to obtain the desired ZrO 2 carrier.

[0032] Take 4.50g ZrO 2 Support preparation of CuO / ZrO 2 catalyst. ZrO 2 Grind into powder, add 9g of water, and disperse under 1400W for 10 minutes with ultrasonic assistance to for...

Embodiment 2

[0037] Embodiment 2: Adding method 1 of auxiliary agent

[0038] Preparation of ZrO 2 Carrier: Take 60mL of 0.2g / mL ZrOCl 2 ·8H 2 Put O aqueous solution into 100mL high-pressure polytetrafluoroethylene lining, then put the inner lining into the stainless steel outer lining, screw it tightly, and put it into the blast drying oven. At 150°C, heat for 6h. After the hydrothermal kettle dropped to room temperature, pour out the emulsion in the inner lining, add 25% concentrated ammonia water dropwise to the emulsion, adjust the pH of the system to 9, and then wash the precipitate by centrifugation for 6 times, and wash it with AgNO 3 Detection without Cl - until. The resulting precipitate was dried at 80°C for 6h, and then fired in a muffle furnace at 350°C for 6h to obtain the desired ZrO 2 carrier.

[0039] Take 4.45 g ZrO 2 Carrier for catalyst preparation. ZrO 2 Grind into powder, add 13g of water, disperse under 1600W for 20 minutes with ultrasonic assistance, and fo...

Embodiment 3

[0042] Embodiment 3: Adding method 2 of auxiliary agent

[0043] Preparation of doped ZrO 2 Carrier: Take 0.56g of La(NO 3 ) 3 ·6H 2 O solid with 10.46g ZrOCl 2 Dissolve the 8H2O solid in 60mL of water and put it into a 100mL high-pressure polytetrafluoroethylene lining, then put the inner lining into a stainless steel outer lining, screw it tightly, and put it into a blast drying oven. At 150°C, heat for 6h. After the hydrothermal kettle dropped to room temperature, pour out the emulsion in the inner lining, add 25% concentrated ammonia water dropwise to the emulsion, adjust the pH of the system to 9, and then wash the precipitate by centrifugation for 6 times, and wash it with AgNO 3 Detection without Cl- until. The resulting precipitate was dried at 80°C for 6h, and then fired in a muffle furnace at 350°C for 6h to obtain the desired doped ZrO 2 carrier.

[0044] Get 4.50g doped ZrO 2 Support preparation of CuO / ZrO 2 catalyst. ZrO 2 Grind into powder, add 10g of...

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Abstract

The invention relates to a low-temperature water gas conversion catalyst under hydrogen rich reformed gas and a preparation method thereof, and belongs to the technical field of water gas conversion processes and catalysts. The active ingredient in the catalyst is Cu, the carrier is monoclinic phase ZrO2, and the auxiliary agent is one or more of acidic oxide and rare earth oxide. During preparation, the carrier is prepared by using a hydrothermal method, and then the active ingredient is carried by using a co-precipitation method. Compared with other copper-based conversion catalysts, the catalyst prepared by the method has high water gas conversion catalysis activity, and particularly the low-temperature water gas conversion activity of the catalyst is remarkably improved. For example, the catalyst with 25 percent of CuO can achieve the CO conversion rate of 53 percent at the temperature of 150 DEG C, and the CO conversion rate at the reaction temperature of 200 to 300 DEG C is over 90 percent.

Description

technical field [0001] The invention relates to a low-temperature water-gas shift catalyst, in particular to a low-temperature water-gas shift catalyst applied in a hydrogen-rich reformed gas atmosphere and a preparation method thereof. Background technique [0002] Water-Gas-Shift Reaction (Water-Gas-Shift Reaction, CO + H 2 O → CO 2 + H 2 ) is a reaction process widely used in industry, mainly used for hydrogen production in industries such as synthetic ammonia and for regulating CO and H in the process of syngas production and processing 2 proportion. Due to its important application in proton membrane fuel cells, low-temperature water-gas shift has once again attracted widespread attention. The combination of low-temperature water-gas shift and CO selective oxidation can reduce the CO content in raw hydrogen to below 10-50ppm. To meet the high standard requirements of fuel cells for hydrogen raw materials. However, proton membrane fuel cells also put forward more s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/72B01J21/06B01J23/83B01J37/18C01B3/16C10K3/04
CPCY02P20/52
Inventor 郑起阮春晓曹彦宁詹瑛瑛林性贻陈崇启
Owner FUZHOU UNIV
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