Preparation method for one-step synthetic multilayer nanometer box-shaped CuO-CeO2 catalyst for CO preferential oxidation reaction in hydrogen-rich gas

An oxidation reaction, nano-box technology, applied in the direction of metal/metal oxide/metal hydroxide catalyst, physical/chemical process catalyst, chemical instrument and method, etc., can solve the problem of Pt electrode poisoning, etc., and achieve the goal of widening the complete conversion of CO Window, the effect of improving catalyst performance

Active Publication Date: 2016-12-28
INNER MONGOLIA UNIVERSITY +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the limitations of the WGS reaction catalyst, the feed gas still contains 0.5~1.0vol% CO, which will poison the Pt electrode in the PEMFC, so it must be reduced to below 100ppm

Method used

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  • Preparation method for one-step synthetic multilayer nanometer box-shaped CuO-CeO2 catalyst for CO preferential oxidation reaction in hydrogen-rich gas
  • Preparation method for one-step synthetic multilayer nanometer box-shaped CuO-CeO2 catalyst for CO preferential oxidation reaction in hydrogen-rich gas
  • Preparation method for one-step synthetic multilayer nanometer box-shaped CuO-CeO2 catalyst for CO preferential oxidation reaction in hydrogen-rich gas

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Embodiment 1 molar ratio is the test result of Cu: Ce=8: 2:

[0038] At 75°C, the conversion rate of CO is 8.43%, and the selectivity is 100%;

[0039] At 95°C, the conversion rate of CO is 8.31%, and the selectivity is 100%;

[0040] At 115°C, the conversion rate of CO is 17.67%, and the selectivity is 100%;

[0041] At 135°C, the conversion rate of CO is 40.81%, and the selectivity is 78.29%;

[0042] At 155°C, the conversion rate of CO is 78.21%, and the selectivity is 53.64%.

[0043]At 175°C, the conversion rate of CO is 82.55%, and the selectivity is 48.11%.

[0044] At 195°C, the conversion rate of CO is 55.61%, and the selectivity is 32.40%.

[0045] At 215°C, the conversion rate of CO is 35.01%, and the selectivity is 20.49%.

Embodiment 2

[0046] Embodiment 2 molar ratio is the test result of Cu: Ce=7: 3

[0047] At 75°C, the conversion of CO is 3.76%, and the selectivity is 100%.

[0048] At 95°C, the conversion rate of CO is 9.43%, and the selectivity is 100%;

[0049] At 115°C, the conversion rate of CO is 23.02%, and the selectivity is 92.63%;

[0050] At 135°C, the conversion rate of CO is 54.87%, and the selectivity is 79.70%;

[0051] At 155°C, the conversion rate of CO is 88.48%, and the selectivity is 51.72%;

[0052] At 175°C, the conversion rate of CO is 79.73%, and the selectivity is 42.56%.

[0053] At 195°C, the conversion rate of CO is 74.18%, and the selectivity is 39.65%.

[0054] At 215°C, the conversion rate of CO is 54.17%, and the selectivity is 28.69%.

Embodiment 3

[0055] Embodiment 3 molar ratio is the test result of Cu: Ce=6: 4:

[0056] At 75°C, the conversion of CO is 30.33%, and the selectivity is 100%.

[0057] At 95°C, the conversion rate of CO is 74.27%, and the selectivity is 100%;

[0058] At 115°C, the conversion rate of CO is 97.39%, and the selectivity is 95.95%;

[0059] At 135°C, the conversion rate of CO is 100%, and the selectivity is 81.61%;

[0060] At 155°C, the conversion rate of CO is 100%, and the selectivity is 59.75%;

[0061] At 175°C, the CO conversion rate is 94.40%, and the selectivity is 55.72%.

[0062] At 195°C, the conversion rate of CO is 73.52%, and the selectivity is 43.71%.

[0063] At 215°C, the conversion rate of CO is 56.90%, and the selectivity is 33.75%.

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Abstract

The invention discloses a preparation method for a one-step synthetic multilayer nanometer box-shaped CuO-CeO2 catalyst for CO preferential oxidation reaction in hydrogen-rich gas. The catalyst is composed of a plurality of layers of homocentric-square-shaped nanometer box structures which are composed of nanometer CuO and CeO2, triblock copolymer serves as a template, cupric nitrate and cerium nitrate serve as raw materials, and a simple one-step method is adopted to synthesize the catalyst. The multiple layers of cavity structures of the prepared catalyst expose more CuO contact interfaces and CeO2 contact interfaces, and therefore more active sites are provided for the CO preferential oxidation reaction. The catalyst with the special features has good performance that CO complete conversion is achieved at the low temperature, and wide temperature windows with CO being completely converted exist.

Description

technical field [0001] The invention relates to a CuO-CeO synthesized by one-step method for preferential oxidation of CO in hydrogen-rich gas 2 Catalysts, especially those involving CuO-CeO 2 A multilayer nanobox-like structure formed alternately by nanoparticles and cavities. Background technique [0002] Proton exchange membrane fuel cell (PEMFC) is a fuel cell with polymer solid polymer membrane as electrolyte. Because of its advantages such as low operating temperature, short activation time, long working life, reliable operation and simple structure, it is considered as a fuel cell. The fuel cell with the most practical and commercial value among batteries. Its fuel gas mainly comes from the reforming of natural gas, which is obtained through further water gas shift (WGS). However, due to the limitations of the WGS reaction catalyst, the feed gas still contains 0.5-1.0vol% CO, which will poison the Pt electrode in the PEMFC, so it must be reduced to below 100ppm. C...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/83
Inventor 曾尚红高美怡张璐赵小舟苏海全
Owner INNER MONGOLIA UNIVERSITY
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