文献类型：期刊文献

英文题名：Effects of sulfur poisoning on physicochemical properties and performance of MnO2/AlNi-PILC for toluene catalytic combustion

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

机构：[1]Shaoxing Univ, Coll Chem & Chem Engn, Zhejiang Key Lab Alternat Technol Fine Chem Proc, Shaoxing 312000, Peoples R China;[2]Nankai Univ, Coll Chem, State Key Lab Elemento Organ Chem, Key Lab Adv Energy Mat Chem, Tianjin 300071, Peoples R China

年份：2022

卷号：435

外文期刊名：JOURNAL OF HAZARDOUS MATERIALS

收录：SCI-EXPANDED(收录号：WOS:000798745400004)、、EI(收录号：20221812049035)、Scopus(收录号：2-s2.0-85129071643)、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：Toluene catalytic combustion; MnO 2; AlNi-PILC; Structural changes; In-situ sulfur poisoning

外文摘要：AlNi pillared clay (AlNi-PILC) was synthesized firstly, and then MnO2 was supported via wetness impregnation from nitrate precursors. Sulphation was performed by in-situ decomposing ammonium sulfate with different concentrations over MnO2/AlNi-PILC. Catalysts before and after sulfur poisoning were characterized by XRD, N2 adsorption/desorption, HRTEM, XPS, H2-TPR and NH3-TPD. MnO2/AlNi-PILC exhibited high catalytic activity, allowing the complete toluene combustion. Structure of the catalyst was obviously damaged after sulfur poisoning. (001) crystal plane strength of AlNi-PILC was decreased significantly. Meanwhile, the specific surface area and pore volume reduced with increase of sulfate concentration. Sulfur species were readily formed on the surface of poisoned catalyst and deposited in the pore structure of AlNi-PILC, which resulted in significant impacts on the structural stability, acidity and the number of active species. These changes were responsible for the decreased catalytic performance.