Dehydrogenation of isobutane to isobutene over a Pt-Cu bimetallic catalyst in the presence of LaAlO3 perovskite

• 作者: Yanyong Li Meng Ge Jiameng Wang Mengquan Guo Fanji Liu Mingxun Han Yanhong Xu Lihong Zhang
• 来源期刊: 中国化学工程学报（英文版）
• 年，卷（期）: 2021,（4）
• 所属期刊栏目: Catalysis, Kinetics and Reaction Engineering
• 页码范围: 203-211
• 页数: 9页
• 语种: 英文

摘要

In this study, isobutane dehydrogenation to isobutene reaction was carried out in a series of Pt-Cu bimetallic catalysts prepared by co-impregnation method. The catalysts were characterized by means of several techniques, including XRD, N2 adsorption–desorption, TEM, XPS, H2-TPR and TG. The results show that the existence of LaAlO3 perovskite can enhance the dispersion and sintering resistance of metal nanoparticles and facilitate the transfer of carbon deposits from active sites to the support. Interestingly, the perovskite nanoparticles can also inhibit the reduction of CuOx and the formation of PtCu alloys, resulting in the suitable interaction between Pt and Cu. The Pt-Cu/LaAlO3/SiO2 catalyst exhibits the opti-mal dehydrogenation performance with an isobutane conversion of 47％and isobutene selectivity of 92％after 310 min reaction, which was ascribed to the unique role of LaAlO3 perovskite as well as the appro-priate Pt-Cu interaction.