Influence of ceria promoter on shell-powder-supported Pd catalyst for the complete oxidation of benzene

Influence of ceria promoter on shell-powder-supported Pd catalyst for the complete oxidation of benzene
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二氧化铈促进剂对壳粉负载Pd催化剂苯完全氧化的影响

DOI:
10.1016/j.apcata.2012.10.041
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发表时间:
2013-01
期刊:
Applied Catalysis A: General
影响因子:
--
通讯作者:
Qi, Chenze
Qi, Chenze
中科院分区:
其他
文献类型:
--
作者:
Du, Yijun;Liu, Fujian;Han, Dan;Qi, Chenze

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珍珠壳是珍珠产业的主要废弃物,中国每年丢弃上百万吨珍珠壳。到目前为止,珍珠壳用于挥发性有机化合物(VOCs)的完全氧化还没有报道。本文以壳粉(SP)为载体,制备了用于苯完全氧化的CeO_2和Pd催化剂。考察了CeO2助剂对Pd/SP催化剂织构/结构及催化性能的影响。结果表明,在SP载体中加入CeO_2后,SP的BET比表面积和总孔体积增大,烧结性降低。催化活性和H_2程序升温还原(H_2-TPR)结果表明,添加CeO_2可以显著改善Pd/SP催化剂的氧化性能,提高其对苯完全氧化的催化活性。催化剂活性的提高主要是由于Pd和CeO_2的强相互作用以及CeO_2的加入优化了催化剂的织构/结构和氧化还原性能。
Pearl shells are the main waste of the pearl industry, which discards millions of tons of pearl shells each year in China. To date, the use of pearl shells in the complete oxidation of volatile organic compounds (VOCs) has not been reported. In this paper, shell powder (SP) was used as a carrier for ceria and Pd catalysts for the complete oxidation of benzene. The influence of the ceria promoter on the texture/structure and catalytic performance of Pd/SP was investigated. The results show that adding ceria into the SP support increased the BET surface area and total pore volume and decreased the sinterability of SP. The catalytic activity and H2temperature-programmed reduction (H2-TPR) results show that adding ceria can greatly improve the oxidation properties of Pd/SP catalysts and enhance the catalytic activity for the complete oxidation of benzene. The improvement in the catalytic activity is mainly due to the optimization of the catalyst texture/structure and redox properties by the strong interaction of Pd and ceria and the addition of ceria.
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