石油化工高等学校学报

石油化工高等学校学报 ›› 2024, Vol. 37 ›› Issue (5): 46-55.DOI: 10.12422/j.issn.1006-396X.2024.05.006

• 催化剂及催化材料 • 上一篇    下一篇

助剂Ga对Pt基催化剂脱氢性能的影响

赵明明(), 娄洺源, 朴茜琳, 迟昊天, 张海娟()   

  1. 辽宁石油化工大学 石油化工学院,辽宁 抚顺 113001
  • 收稿日期:2024-04-12 修回日期:2024-05-23 出版日期:2024-10-25 发布日期:2024-11-01
  • 通讯作者: 张海娟
  • 作者简介:赵明明(1997⁃),女,硕士研究生,从事Pt基丙烷脱氢催化剂活性相方面的研究;E⁃mail:1626173019@qq.com
  • 基金资助:
    辽宁省联合基金项目(U1908203);辽宁省教育厅面上项目(JYTMS20231438)

Effect of Additive Ga on Dehydrogenation Performance of Pt⁃Based Catalyst

Mingming ZHAO(), Mingyuan LOU, Xilin PIAO, Haotian CHI, Haijuan ZHANG()   

  1. School of Petrochemical Engineering,Liaoning Petrochemical University,Fushun Liaoning 113001,China
  • Received:2024-04-12 Revised:2024-05-23 Published:2024-10-25 Online:2024-11-01
  • Contact: Haijuan ZHANG

摘要:

通过添加助剂调控Pt基催化剂的活性相,可以达到提高催化剂选择性和稳定性的目的。以Ga为助剂,通过改变n(Ga)/n(Pt)调控Pt基催化剂的活性相,并采用BET、FT-IR、TG、H2-TPR等手段对其进行了表征;在反应温度为580 ℃、体积空速为2 000 h-1、氢烃比(氢气与丙烷的体积比)为1的条件下,研究了Pt基催化剂脱氢性能。结果表明,Pt7Ga/Al2O3催化剂中的Pt粒径最小,分散性最好;Pt7Ga/Al2O3催化剂脱氢性能最好,反应3 h的丙烯选择性为90.98%,比PtSn/Al2O3催化剂高3.01%;Ga的调控增强了Pt与载体Al2O3间的作用力,降低了催化剂的酸性和催化剂的石墨化程度。

关键词: Pt基催化剂, 丙烷脱氢, 活性相, 助剂Ga, 石墨化程度

Abstract:

The selectivity and stability of Pt?based catalysts can be improved by adjusting the active phase by adding additives. The active phase of Pt?based catalyst was regulated by changing n(Ga)/n(Pt) with Ga as an additive and characterized by BET, FT-IR, TG, H2-TPR, etc. The n(Ga)/n(Pt) of the active phase was optimized under the reaction temperature of 580 ℃, volume space velocity of 2 000 h-1 and hydrogen?hydrocarbon ratio (volume ratio of hydrogen to propane) of 1. The results show that the Pt in the Pt7Ga/Al2O3 catalyst has the smallest particle size and the best dispersion.The Pt7Ga/Al2O3 catalyst has the best dehydrogenation performance, and the propylene selectivity of the reaction for 3 h was 90.98%, which was 3.01% higher than that with the PtSn/Al2O3 catalyst. The regulation of Ga can enhance the interaction force between Pt and Al2O3 support, lower the acidity of catalyst and the degree of graphitization of catalyst carbon deposition.

Key words: Pt based catalyst, Propane dehydrogenation, Active phase, Additive Ga, Degree of graphitization

中图分类号: 

引用本文

赵明明, 娄洺源, 朴茜琳, 迟昊天, 张海娟. 助剂Ga对Pt基催化剂脱氢性能的影响[J]. 石油化工高等学校学报, 2024, 37(5): 46-55.

Mingming ZHAO, Mingyuan LOU, Xilin PIAO, Haotian CHI, Haijuan ZHANG. Effect of Additive Ga on Dehydrogenation Performance of Pt⁃Based Catalyst[J]. Journal of Petrochemical Universities, 2024, 37(5): 46-55.

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