Paper Title:
Effect of Hydrothermal Conditions on Isomerization Activity of Pt/SO42--ZrO2
  Abstract

Pt/SO42--ZrO2 catalysts (PSZ) were prepared by using a series of hydrous zirconia as support synthesized via a hydrothermal method. The catalytic performances of these catalysts were evaluated in the n-hexane isomerization in a fixed bed reactor. The crystalline structure, acidity, reduction properties, textural texture, and sulfur content were characterized by XRD, NH3-TPD, H2-TPR, N2 adsorption and thermal analysis. The experimental results indicated that the hydrothermal ageing of zirconium hydroxide led to great changes in the crystalline structure of hydrous zirconia support, sulfur content, and the acidity of PSZ. The abundant strong acid sites and high sulfur content were essential but insufficient to achieve a PSZ catalyst with high isomerization activity. Too weak or too strong interaction between sulfur species and zirconia in the catalysts was unfavorable to the isomerization reaction. The presence of considerable sulfate species interacting moderately with zirconia was crucial to high isomerization activity.

  Info
Periodical
Edited by
Jin-An Wang, Guozhong Cao and José Manuel Domínguez
Pages
183-191
DOI
10.4028/www.scientific.net/AMR.132.183
Citation
J. J. Zhang, Y. Q. Song, X. L. Zhou, C. L. Li, J. A. Wang, L. Y. Xu, "Effect of Hydrothermal Conditions on Isomerization Activity of Pt/SO42--ZrO2", Advanced Materials Research, Vol. 132, pp. 183-191, 2010
Online since
August 2010
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