稀土学报（英文版）
稀土學報（英文版）
희토학보（영문판）
JOURNAL OF RARE EARTHS
2014年
9期
860-866
,共7页
李長益%王昭鈞%蔡承恩%王振熙%蔡振章
李長益%王昭鈞%蔡承恩%王振熙%蔡振章
리장익%왕소균%채승은%왕진희%채진장
diisopropylether hydration%CeO2-ZrO2%precursor effect%hydrothermal co-precipitation%redox catalysis%rare earths
The catalytic potential of CexZr1-xO2 in isopropyl ether (DIPE) hydration was explored. While the acidic H-zeolite catalyst was favorable for propylene formation through carbenium ion mechanism, Ce-ZSM-5 and CexZr1-xO2 catalysts improved product se-lectivity of isopropyl alcohol (IPA) through redox mechanism. The catalytic property of CexZr1-xO2 depended on the preparation method and variable, type of cerium precursor and Ce/Zr ratio. By means of characterizations with X-ray diffraction, N2 adsorption isotherms and NH3 temperature programmed desorption, tetragonal phase of CexZr1-xO2 was proposed as the active phase in which CeO2 and ZrO2 catalyzed synergistically the DIPE hydration with IPA product selectivity. The CexZr1-xO2 prepared from cerium sul-fate precursor with co-precipitation hydrothermal method exhibited maximum catalytic activity and IPA product selectivity. The pre-cursor effect was attributed to the stabilization of SO42- species on the tetragonal phase of CexZr1-xO2 and super solid acidity.
