文献类型：期刊文献

英文题名：Millimeter-sized mesoporous carbon spheres for highly efficient catalytic oxidation of hydrogen sulfide at room temperature

作者：Zhang, Zixiao[1];Wang, Jitong[1];Li, Wencheng[1];Wang, Mei[1];Qiao, Wenming[1];Long, Donghui[1];Ling, Licheng[1]

机构：[1]E China Univ Sci & Technol, State Key Lab Chem Engn, Shanghai 200237, Peoples R China

年份：2016

卷号：96

起止页码：608

外文期刊名：CARBON

收录：;EI(收录号：20154801613859);WOS:【SCI-EXPANDED(收录号:WOS:000366078000072)】；

基金：This work was partly supported by MOST (2014CB239702) and National Science Foundation of China (No. 51302083, No. 21576090, No. 21506061), and Fundamental Research Funds for the Central Universities and Shanghai Raising Star Program.

语种：英文

外文关键词：Catalysts - Potassium hydroxide - Magnesia - Sodium hydroxide - Carbon - Sodium Carbonate - Mesoporous materials - Catalytic oxidation - Pore size

摘要：Millimeter-sized mesoporous carbon spheres (MCSs) with high strength and developed mesoporous structure were prepared by a scalable suspension-assisted nanocasting process. The obtained MCSs were further used as supports to load basic impregnants for highly efficient catalytic oxidation of H2S at room temperature. High removal capacity (up to 2.46 g H2S/g catalyst) was achieved for the catalysts, which should be attributed to the large pore size and 3D mesoporosity of the MCSs that allowed,easy diffusion of reactants and products, while high pore volume severed as a storehouse for the product sulfur. The type of caustic impregnants and their loading determined strikingly the catalytic performance. It was found that the basic MgO performed much better performance than conventional basic salts such as Na2CO3, NaOH, K2CO3 and KOH. The capacity increased generally with the increase of the MgO loading but significantly decreased at a overloading of 20 wt. %. In addition, the catalytic performance was also depended on the operating conditions such as humidity and reaction temperature. Owing to the unique structural advantages including high strength, low flow resistance, and high resistant to abrasion, the as-prepared catalysts could be directly used for practical H2S removal without further forming and treatment. (C) 2015 Elsevier Ltd. All rights reserved.