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

doi:10.1016/j.cjche.2020.07.027

中国化学工程学报 ›› 2021, Vol. 32 ›› Issue (4): 203-211.DOI: 10.1016/j.cjche.2020.07.027

• Catalysis, Kinetics and Reaction Engineering • 上一篇下一篇

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

Yanyong Li¹, Meng Ge¹, Jiameng Wang¹, Mengquan Guo¹, Fanji Liu¹, Mingxun Han¹, Yanhong Xu², Lihong Zhang¹

1 Department of Catalysis Science and Technology, Tianjin Key Laboratory of Applied Catalysis Science&Technology, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300350, China;
2 Department of Materials Engineering, Xuzhou College of Industrial Technology, Xuzhou 221140, China

收稿日期:2020-02-25 修回日期:2020-07-09 出版日期:2021-04-28 发布日期:2021-06-19
通讯作者: Lihong Zhang
基金资助:
This work was supported by the National Natural Science Foundation of China (21776214) and State Key Laboratory of Chemical Resource Engineering.

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

Yanyong Li¹, Meng Ge¹, Jiameng Wang¹, Mengquan Guo¹, Fanji Liu¹, Mingxun Han¹, Yanhong Xu², Lihong Zhang¹

1 Department of Catalysis Science and Technology, Tianjin Key Laboratory of Applied Catalysis Science&Technology, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300350, China;
2 Department of Materials Engineering, Xuzhou College of Industrial Technology, Xuzhou 221140, China

Received:2020-02-25 Revised:2020-07-09 Online:2021-04-28 Published:2021-06-19
Contact: Lihong Zhang
Supported by:
This work was supported by the National Natural Science Foundation of China (21776214) and State Key Laboratory of Chemical Resource Engineering.

摘要/Abstract

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 CuO_x and the formation of PtCu alloys, resulting in the suitable interaction between Pt and Cu. The Pt-Cu/LaAlO₃/SiO₂ catalyst exhibits the optimal 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 appropriate Pt-Cu interaction.

关键词: Isobutane dehydrogenation, Catalyst, Nanoparticles, Silica, LaAlO₃ perovskite, Pt-Cu interaction

Abstract: 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 CuO_x and the formation of PtCu alloys, resulting in the suitable interaction between Pt and Cu. The Pt-Cu/LaAlO₃/SiO₂ catalyst exhibits the optimal 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 appropriate Pt-Cu interaction.

Key words: Isobutane dehydrogenation, Catalyst, Nanoparticles, Silica, LaAlO₃ perovskite, Pt-Cu interaction

Yanyong Li, Meng Ge, Jiameng Wang, Mengquan Guo, Fanji Liu, Mingxun Han, Yanhong Xu, Lihong Zhang. Dehydrogenation of isobutane to isobutene over a Pt-Cu bimetallic catalyst in the presence of LaAlO₃ perovskite[J]. 中国化学工程学报, 2021, 32(4): 203-211.

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

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

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