文献类型：期刊文献

英文题名：

Synthesis of quantitative sulfur-poisoned Pd/?-Al2O3 and its deactivation mechanism for catalytic combustion of toluene

作者：Xie, Kaiyuan[1];Wang, Zhuo[1];Jiang, Baishun[1];Zhao, Bo[2];Zuo, Shufeng[1]

机构：[1]Shaoxing Univ, Zhejiang Key Lab Alternat Technol Fine Chem Proc, Shaoxing 312000, Peoples R China;[2]Taizhou Univ, Sch Pharmaceut & Mat Engn, Taizhou 318000, Peoples R China

年份：2022

卷号：639

外文期刊名：APPLIED CATALYSIS A-GENERAL

收录：SCI-EXPANDED(收录号：WOS:000799616200002)、、EI(收录号：20221912082421)、Scopus(收录号：2-s2.0-85129474519)、WOS

基金：Acknowledgements This work was supported by Zhejiang Public Welfare Technology Research Project (No. LGG19B070003) , the Foundation of Science and Technology of Shaoxing City (No. 2018C10019) and the National Nat-ural Science Foundation of China (No. 21577094) .

语种：英文

外文关键词：Catalytic combustion; Pd/?-Al2O3; In situ decomposition; Ammonium sulphate; Sulfur poisoning mechanism

外文摘要：A series of Pd/gamma-Al(2)O(3 & nbsp;)with different degrees of sulfur poisoning have been successfully prepared by in-situ thermal decomposition of (NH4)(2)SO4. The influence of sulfur poisoning on toluene combustion was evaluated. The samples were characterized by XRD, N-2 adsorption/desorption, HRTEM, FT-IR, TG, XPS, NH3-TPD and H-2- TPR. The results indicated that the no-poisoned Pd/gamma-Al2O3 showed the highest activity, which was attributed to the cooperation of Pd0 and Pd2+ species. However, all sulfur-poisoned catalysts showed a decline in activity, which was quantitatively related to the amount of (NH4)(2)SO4. It was found that the Pd0 active sites were more easily contaminated by sulfur species than the Pd2+ active sites, resulting in the deactivation of the catalysts. In addition, gamma-Al2O3 also reacted with sulfur to produce aluminum sulfur, which led to a significant increase in the strong acid site of the catalyst, while no beneficial effect was observed during our study.