氨浓度对氨蒸发法制备Pd-Cu/凹凸棒土催化剂常温CO氧化性能的影响

王永钊; 范莉渊; 武瑞芳; 石晶; 李潇; 赵永祥

氨浓度对氨蒸发法制备Pd-Cu/凹凸棒土催化剂常温CO氧化性能的影响

山西大学化学化工学院, 精细化学品教育部工程研究中心, 山西太原 030006

基金项目: 国家自然科学基金(21073114); 国际合作项目(2013DFA40460); 山西省科技创新重点团队项目(2012021007)。

详细信息

通讯作者:
王永钊,Fax:+86-351-7011688,E-mail:catalyst@sxu.edu.cn;赵永祥,E-mail:yxzhao@sxu.edu.cn。

中图分类号: O643
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- 文章访问数: 291
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出版历程
- 收稿日期: 2015-02-15
- 修回日期: 2015-06-01
- 刊出日期: 2015-09-30

Effect of ammonia concentration on the catalytic activity of Pd-Cu supported on attapulgite clay prepared by ammonia evaporation in CO oxidation at room temperature

School of Chemistry and Chemical Engineering, Engineering Research Center for Fine Chemicals of Ministry of Education, Shanxi University, Taiyuan 030006, China

摘要

摘要: 以凹凸棒土(APT)作载体,采用氨蒸发法制备了Pd-Cu/APT催化剂,以CO氧化为探针反应,在连续流动微反应装置上,考察了初始氨浓度对催化剂CO常温催化氧化性能的影响。通过N₂-physisorption、XRD、FT-IR、TEM和H₂-TPR等手段对催化剂的结构和性质进行了表征。结果表明,在较低或过高氨浓度条件下,制备的Pd-Cu/APT中Cu物种均主要以CuO为主,仅有少量Cu₂(OH)₃Cl;适宜的氨浓度有利于稳定Cu₂(OH)₃Cl物相的形成,其薄片状的形貌特征、良好的分散状态以及与Pd物种间较强的相互作用,显著提高了CO催化氧化性能。在空速6 000 h^-1、CO体积分数1.5%、水蒸气体积分数3.3%的反应条件下,Pd-Cu/APT催化剂表现出优异的CO室温催化氧化活性和稳定性。
- Pd-Cu/APT /
- 凹凸棒土 /
- 氨蒸发法 /
- 氨浓度 /
- CO常温催化氧化
Abstract: With attapulgite clay (APT) as support, the Pd-Cu/APT catalysts were prepared by an ammonia evaporation method and characterized by N₂-physisorption, XRD, FT-IR, TEM and H₂-TPR. The effect of ammonia concentration on the catalytic performance of Pd-Cu/APT in CO oxidation at room temperature was investigated in a fixed-bed continuous flow microreactor. The results showed that CuO appears as the main Cu species in the Pd-Cu/APT catalysts prepared with over low or over high ammonia concentration, whereas the quantity of Cu₂(OH)₃Cl phase is much less. However, a proper concentration of ammonia is of benefits to forming stable Cu₂(OH)₃Cl species in Pd-Cu/APT; owing to its high dispersion, nano-platelet morphology and strong interaction with Pd species, the presence of stable Cu₂(OH)₃Cl can significantly promote the catalytic performance of Pd-Cu/APT in CO oxidation. Under a gas hourly space velocity (GHSV) of 6 000 h^-1 for a feed stream containing 1.5% CO and 3.3% water, the Pd-Cu/APT catalyst exhibits excellent activity and stability in CO oxidation even at room temperature.
- Pd-Cu/APT /
- attapulgite clay /
- ammonia evaporation /
- ammonia concentration /
- room-temperature CO oxidation

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参考文献(24)

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氨浓度对氨蒸发法制备Pd-Cu/凹凸棒土催化剂常温CO氧化性能的影响

通讯作者:
王永钊,Fax:+86-351-7011688,E-mail:catalyst@sxu.edu.cn;赵永祥,E-mail:yxzhao@sxu.edu.cn。

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Effect of ammonia concentration on the catalytic activity of Pd-Cu supported on attapulgite clay prepared by ammonia evaporation in CO oxidation at room temperature

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氨浓度对氨蒸发法制备Pd-Cu/凹凸棒土催化剂常温CO氧化性能的影响

通讯作者: 王永钊,Fax:+86-351-7011688,E-mail:catalyst@sxu.edu.cn;赵永祥,E-mail:yxzhao@sxu.edu.cn。

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出版历程

Effect of ammonia concentration on the catalytic activity of Pd-Cu supported on attapulgite clay prepared by ammonia evaporation in CO oxidation at room temperature

计量

出版历程

目录

2023年《燃料化学学报（中英文）》评优结果公布！

通讯作者:
王永钊,Fax:+86-351-7011688,E-mail:catalyst@sxu.edu.cn;赵永祥,E-mail:yxzhao@sxu.edu.cn。