TY - GEN
T1 - Effect of hydrothermal conditions on isomerization activity of Pt/SO 4 2--ZrO2
AU - Zhang, Juanjuan
AU - Song, Yueqin
AU - Zhou, Xiaolong
AU - Li, Chenglie
AU - Wang, Jin An
AU - Xu, Longya
PY - 2010
Y1 - 2010
N2 - Pt/SO4 2--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.
AB - Pt/SO4 2--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.
KW - Hydrothermal treatment
KW - Isomerization
KW - N-Hexane
KW - Platinum
KW - Sulfated Zirconia
UR - http://www.scopus.com/inward/record.url?scp=78651254578&partnerID=8YFLogxK
U2 - 10.4028/www.scientific.net/AMR.132.183
DO - 10.4028/www.scientific.net/AMR.132.183
M3 - Contribución a la conferencia
SN - 9780878492404
T3 - Advanced Materials Research
SP - 183
EP - 191
BT - Advances in New Catalytic Materials
T2 - 2nd International Symposium on New Catalytic Materials, NCM-2
Y2 - 16 August 2009 through 20 August 2009
ER -