Novel morphology controllable CeO2/Cu2O catalyst for CO preferential oxidation reaction through liquid-phase reduction method

A catalyst and reduction technology, which is used in the field of liquid phase reduction method to synthesize a new type of catalyst for CO preferential oxidation reaction CeO2/Cu2O, which can solve the problems of low poisoning ability, high price and limitation, and achieve low price. , wide temperature window, good CO conversion and selectivity

Active Publication Date: 2015-04-01
INNER MONGOLIA UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Noble metal catalysts such as Pt, Au, etc. have good catalytic performance, but their expensive price and low resistance to H 2 O and CO 2 Poisoning ability limits its application

Method used

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  • Novel morphology controllable CeO2/Cu2O catalyst for CO preferential oxidation reaction through liquid-phase reduction method
  • Novel morphology controllable CeO2/Cu2O catalyst for CO preferential oxidation reaction through liquid-phase reduction method
  • Novel morphology controllable CeO2/Cu2O catalyst for CO preferential oxidation reaction through liquid-phase reduction method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] 6) Measure CuSO respectively 4 , Na 3 C 6 h 5 o 7 , Na 2 CO 3 , C 6 h 12 o 12 Add 20ml of each solution into a three-necked flask, add 400ml of deionized water, heat to 80°C, and mechanically stir for 40min.

[0040] 7) Wash the obtained precipitate by centrifugation. Wash three times with water first, and then wash three times with absolute ethanol. The precipitate was vacuum-dried at 60 °C for 12 h to obtain star-shaped Cu 2 O carrier.

[0041] 8) Take 1g (6.988mmol) of the prepared star-shaped Cu 2 Add distilled water dropwise to the O carrier until the incipient wetness, and record its water absorption as 0.5ml, which is the minimum amount of water required to wet the carrier.

[0042] 9) Take 6.988mmol Ce(NO 3 ) 3 ·6H 2 O was dissolved in 0.5ml distilled water and ultrasonicated until completely dissolved to obtain Ce(NO 3 ) 3 solution.

[0043] 10) Take 1g of the prepared star-shaped Cu 2 O carrier to Ce(NO 3 ) 3 solution, soaked for 24 hours...

Embodiment 2

[0046] 6) Measure 20ml CuSO 4 Add the solution into a three-necked flask, add 400ml of deionized water to dissolve, add 20ml of CTAB, heat to 80°C, stir mechanically for 10-15min, then add 20ml of Na 3 C 6 h 5 o 7 and 20ml Na 2 CO 3 Mix the solution, after 10min, add 20ml C 6 h 12 o 12 The solution was mechanically stirred for 30 min.

[0047] 7) Wash the obtained precipitate by centrifugation. Wash three times with water first, and then wash three times with absolute ethanol. The precipitate was vacuum-dried at 60 °C for 12 h to obtain hollow spheres Cu 2 O carrier.

[0048] 8) Take 1g (6.988mmol) of the prepared hollow spherical Cu 2 Add distilled water dropwise to the O carrier until the incipient wetness, and record its water absorption as 0.5ml, which is the minimum amount of water required to wet the carrier.

[0049] 9) Take 6.988mmol Ce(NO 3 ) 3 ·6H 2 Ce(NO 3 ) 3 solution.

[0050] 10) Take 1g of the prepared hollow spherical Cu 2 The O carrier is d...

Embodiment 3

[0053] 6) Measure CuSO respectively 4 , Na 3 C 6 h 5 o 7 , Na 2 CO 3 , C 6 h 12 o 12 Add 20ml of each solution into a three-necked flask, add 400ml of deionized water, add 20ml of 2.0mM CTAB, heat to 80°C, and mechanically stir for 40min.

[0054] 7) After the obtained solution is fully precipitated, it is centrifuged and washed. Wash three times with water first, and then wash three times with absolute ethanol. The precipitate was vacuum-dried at 60 °C for 12 h to obtain polyhedral Cu 2 O carrier.

[0055] 8) Take 1g (6.988mmol) of the prepared polyhedral Cu 2 Add distilled water dropwise to the O carrier until the incipient wetness, and record its water absorption as 0.5ml, which is the minimum amount of water required to wet the carrier.

[0056] 9) Take 6.988mmol Ce(NO 3 ) 3 ·6H 2 Ce(NO 3 ) 3 solution.

[0057] 10) Take 1g of the prepared polyhedral Cu 2 The O carrier is dissolved in the Ce(NO 3 ) 3 solution, soaked for 24 hours and then vacuum-dried ...

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Abstract

The invention discloses a preparation method of a novel morphology controllable CeO2 / Cu2O catalyst; the catalyst is applied to preferential oxidation reaction of CO in hydrogen-enriched gas; a Cu2O carrier is synthesized through a liquid-phase reduction method by taking sodium carbonate as a precipitator, sodium citrate as a complexing agent and glucose as a reducing agent; and CeO2 / Cu2O can be synthesized through an incipient-wetness impregnation method by taking cerous nitrate as the raw material. The catalyst carrier Cu2O disclosed by the invention is shaped as a star, a polyhedron and a hollow ball; this kind of catalyst is very novel for CO preferential oxidation application researches; the preparation method and the process of the catalyst disclosed by the invention are simple and easy to do; the costs of raw materials are relatively lower; the CO preferential oxidation conversion rate and the selectivity are higher; and the CO complete conversion temperature window is wider.

Description

technical field [0001] The present invention relates to a CeO for the preferential oxidation of CO 2 / Cu 2 Novel catalysts and liquid-phase reduction synthesis methods for O, especially CeO for preferential oxidation of CO 2 / Cu 2 O catalyst support Cu 2 O is in the form of star, hollow sphere and polyhedron. Background technique [0002] Hydrogen energy is an ideal clean energy. Proton exchange membrane fuel cell (PEMFC), as one of the ideal conversion devices for hydrogen energy, has the advantages of high efficiency and low pollution. The feed gas still contains 0.5% to 2% CO after water-gas shift, which will cause Pt electrode poisoning, so the CO content in the hydrogen-rich gas must be controlled below 10ppm. [0003] Preferential oxidation is considered to reduce the CO content in the hydrogen-rich gas to 10 -6 One of the most effective and easiest ways to level up. The catalysts currently used in CO-PROX mainly include noble metals and non-noble metals. Noble...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/83C01B3/58
Inventor 曾尚红殷越玲马晓凤苏海全
Owner INNER MONGOLIA UNIVERSITY
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