以Al 2 O 3 为黏结剂制备的Pt-WO 3 /ZrO 2 /Al 2 O 3 催化剂上的正庚烷异构化

Translated title of the contribution: n-Heptane Hydroisomerization over Alumina Binder-Shaped Pt-WO 3 /ZrO 2 /Al 2 O 3 Catalysts

Hong Yan Zhang, Yue Qin Song, Zhao Hui Wang, Xiao Long Zhou, Li Fang Chen

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

Abstract

A series of Pt-WO 3 /ZrO 2 /Al 2 O 3 (PtWZA)catalysts were prepared by extrusion method using Al 2 O 3 as a binder. The isomerization performance of n-heptane by PtWZA catalysts was evaluated on a micro-fixed bed reactor. The influence of Al 2 O 3 mass fraction, WO 3 mass fraction and calcination temperature on the physico-chemical properties and isomerization performance of PtWZA catalysts were studied. The crystalline structure, specific surface area and acidity of catalysts were determined by XRD, nitrogen adsorption-desorption and Py-FTIR, respectively. The results indicated that the addition of proper amount of Al 2 O 3 had a significant effect on the isomerization performance for PtWZA catalysts. However, the effect of the catalytic performance on the isomerisation activity is not only related to the mass fraction of Al 2 O 3 , but also to the mass fraction of WO 3 . The catalytic activity was greatly enhanced when small mass fraction (2%) of Al 2 O 3 was introduced into PtWZA catalysts for a low mass fraction (15%) of WO 3 . However, the catalytic activity increased slightly when small amount of Al 2 O 3 was introduced into Pt20WZ catalysts. The n-heptane isomerization activity of Pt15WZA and Pt20WZA catalysts greatly decreased with 15% Al 2 O 3 mass fraction. The isomerization activity of PtWZ15A catalysts increased significantly when the mass fraction of WO 3 increased. The enhancement in the calcination temperature led to an appreciable improvement in the catalytic activity of Pt20WZ10A catalysts. High calcination temperature resulted in the decrease of isomerisation activity. The suitable calcination temperature of Pt20WZ10A catalysts is in the range of 800-850 ℃.

Translated title of the contribution n-Heptane Hydroisomerization over Alumina Binder-Shaped Pt-WO 3 /ZrO 2 /Al 2 O 3 Catalysts
Original languageChinese (Simplified)
Pages (from-to)807-815
Number of pages9
JournalHuadong Ligong Daxue Xuebao/Journal of East China University of Science and Technology
Volume44
Issue number6
DOIs
StatePublished - 30 Dec 2018
Externally publishedYes

Keywords

  • Al O
  • Hydroisomerization
  • N-heptane
  • Pt-WO /ZrO

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