| 中空纤维Au-CeZr/FAU催化膜的制备及在富氢气氛CO选择性氧化反应中的应用 |
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| 引用本文： | 魏李娜,彭莉,朱锋,顾鹏飞,顾学红.中空纤维Au-CeZr/FAU催化膜的制备及在富氢气氛CO选择性氧化反应中的应用[J].高等学校化学学报,2022,43(10):20220175. |
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| 作者姓名： | 魏李娜 彭莉 朱锋 顾鹏飞 顾学红 |
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| 作者单位： | 南京工业大学化工学院, 材料化学工程国家重点实验室, 南京 211816 |
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| 基金项目： | 国家自然科学基金(22035002);江苏省政策引导类计划(国际科技合作/港澳台科技合作): “一带一路”创新计划(BZ2020065) |
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| 摘 要： | 采用浸渍法制备了一系列不同Ce/Zr掺杂比例的FAU分子筛膜, 并进一步负载纳米金, 制备了Au-CeZr/FAU催化膜. 对催化膜的微观形貌及结构进行了表征, 并对其在富氢气氛中催化CO优先氧化性能进行了研究. H2-TPR结果表明, Ce/Zr掺杂比为1∶1时制得的催化膜Au-Ce1Zr1/FAU具有最好的被还原能力, 更有利于Au的分散与还原; O2-TPD结果表明, 该样品的氧物种比其它样品上的氧物种活性更高. 更好的被还原性能和更高的氧物种活性使得制备的Au-Ce1Zr1/FAU催化膜性能最佳, 在60 ℃时CO转化率与O2选择性可以同时达到100%, 并且在经过10次热循环测试后仍然可以保持稳定的催化性能.
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| 关 键 词： | CO选择性氧化 分子筛 催化膜 |
| 收稿时间： | 2022-03-22 |
Preparation of Au-CeZr/FAU Catalytic Membranes for Preferential Oxidation of CO in H2-rich Stream |
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| WEI Lina,PENG Li,ZHU Feng,GU Pengfei,GU Xuehong.Preparation of Au-CeZr/FAU Catalytic Membranes for Preferential Oxidation of CO in H2-rich Stream[J].Chemical Research In Chinese Universities,2022,43(10):20220175. |
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| Authors: | WEI Lina PENG Li ZHU Feng GU Pengfei GU Xuehong |
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| Institution: | State Key Laboratory of Materials?Oriented Chemical Engineering，College of Chemical Engineering，Nanjing Tech University，Nanjing 211816，China |
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| Abstract: | A series of CeZr/FAU zeolite membranes with different Ce/Zr doping ratios was prepared by impregnation method， and further loaded with nano-gold to prepare Au-CeZr/FAU catalytic membranes. The obtained membranes were well characterized， and their catalytic performances toward the preferential oxidation of CO in H2-rich gases were studied. The H2-TPR analysis showed that the Au-Ce1Zr1/FAU membrane with Ce/Zr doping ratio of 1∶1 had the best redox ability， which benefited the dispersion and reduction of Au nanoparticles. The O2-TPD analysis suggested that this membrane also possessed more active oxygen species. As a result， the Au-Ce1Zr1/FAU catalytic membrane exhibited the best catalytic activity for CO-PROX reaction with 100% CO conversion and 100% O2 selectivity at low temperature of 60 ℃ as well as high stability for 10 thermal cycling tests. |
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| Keywords: | CO preferential oxidation Zeolite Catalytic membrane |
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