当前位置: X-MOL 学术Catal. Sci. Technol. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Self-adaptive structure and catalytic performance of the Pt–Sn/Al2O3 propane dehydrogenation catalyst regenerated by dichloroethane oxychlorination
Catalysis Science & Technology ( IF 4.4 ) Pub Date : 2022-11-01 , DOI: 10.1039/d2cy00921h
Fang-Cheng Zhao 1 , Huan Yang 1 , Zhi-Jun Sui 1 , Yi-An Zhu 1 , De Chen 2 , Xing-Gui Zhou 1
Affiliation  

Oxychlorination regeneration is an important and effective regeneration method for Pt based catalysts for propane dehydrogenation. Cl2 and HCl are usually adopted as the chlorine source, which may jeopardize equipment and impair health seriously. A safer and less corrosive chlorine source, dichloroethane, is applied to oxychlorination regeneration of a series of Pt–Sn/Al2O3 catalysts after oxidation treatment. The catalysts are characterized by H2-TPR, CO-DRIFTS, HAADF-STEM, XPS, and UV-vis DRS and their catalytic performances are also tested. It's found that the catalyst structures are self-adaptive for catalyzing the propane dehydrogenation reaction during the oxidation and oxychlorination treatment, in which Sn species combines with the alumina support in the ionic state and Pt is highly dispersed through an oxychloroplatinum complex. Pt migrates to sites having a stronger interaction with the support, leading to higher activity and selectivity. The performance of the regenerated catalyst is a function of oxychlorination conditions, indicating the possible influence of the coordination of chloride species with Pt on catalytic performance.

中文翻译:

二氯乙烷氧氯化再生Pt-Sn/Al2O3丙烷脱氢催化剂的自适应结构及催化性能

氧氯化再生是铂基丙烷脱氢催化剂重要且有效的再生方法。通常采用Cl 2和HCl作为氯源,这可能会危害设备并严重损害健康。将更安全、腐蚀性较小的氯源二氯乙烷应用于氧化处理后的一系列Pt-Sn/Al 2 O 3催化剂的氧氯化再生。催化剂的特点是H 2-TPR、CO-DRIFTS、HAADF-STEM、XPS 和 UV-vis DRS 及其催化性能也进行了测试。研究发现,在氧化和氧氯化处理过程中,催化剂结构对催化丙烷脱氢反应具有自适应性,其中Sn物质以离子状态与氧化铝载体结合,Pt通过氧氯铂络合物高度分散。Pt 迁移到与载体具有更强相互作用的位点,从而导致更高的活性和选择性。再生催化剂的性能是氧氯化条件的函数,表明氯化物与 Pt 的配位可能对催化性能产生影响。
更新日期:2022-11-01
down
wechat
bug