Cr-Substituted Mesoporous Aluminophosphate Molecular Sieve: Preparation, Characterization and Catalytic Activity in the Oxidation Reaction of Ethylbenzene

2012 ◽  
Vol 496 ◽  
pp. 285-289
Author(s):  
Ji Shi Zhang ◽  
Zhe Wang ◽  
Jing Wen Xue ◽  
Xin Zhu Li
Keyword(s):  
Catalytic Activity ◽  
Long Range ◽  
Molecular Sieve ◽  
Oxidation Reaction ◽  
Mesoporous Molecular Sieve ◽  
Ordered Structure ◽  
Tertiary Butyl ◽  
Cr Map

Cr-substituted mesoporous aluminophosphate molecular sieve (Cr-MAP) was prepared and characterized. Cr-MAP is a typical mesoporous molecular sieve with long-range ordered structure, providing effective molecular sieve for fabricating acetophenone by selectively oxizing ethylbenzene with tertiary butyl hydro peroxide (TBHP). When the reaction is at 100 °C for 8 h, using chlorobenzene as solvent and TBHP as oxidant, ethylbenzene conversion, acetophenone selectivity and acetophenone yield reach 72.8 %, 85.4 %, and 62.2 %, respectively.

Cr-Substituted Mesoporous Aluminophosphate Molecular Sieve: Synthesis, Characterization, Crystallization Kinetics and Catalytic Activity

2013 ◽  
Vol 316-317 ◽  
pp. 1018-1023
Author(s):  
Xin Zhu Li ◽  
Ji Shi Zhang
Keyword(s):  
Activation Energy ◽  
Catalytic Activity ◽  
Crystal Growth ◽  
Crystallization Kinetics ◽  
Molecular Sieve ◽  
Arrhenius Equation ◽  
Degree Of Crystallinity ◽  
Tert Butylhydroperoxide ◽  
Growth Activation ◽  
Cr Map

Cr-substituted mesoporous aluminophosphate molecular sieve (Cr-MAP) was synthesized and characterized. Crystallization kinetics curves measured as an index to the relative degree of crystallinity, according to the Arrhenius equation to calculate the apparent nucleation activation energy and crystal growth activation energy of Cr-MAP, which was 63.7 and 14.7 kJ• mol-1, respectively. Cr-MAP had highly catalytic activity for fabricating acetophenone by selectively oxizing ethylbenzene. Using tert-butylhydroperoxide as oxidant and chlorobenzene as solvent at 100 °C for 8 h, acetophenone selectivity, acetophenone yield and ethylbenzene conversion reaches 85.4, 62.2 and 72.8 %, respectively.

A new nonionic surfactant pathway to mesoporous molecular sieve silicas with long range framework order

1999 ◽  
pp. 1803-1804 ◽  
Author(s):  
Wenzhong Zhang ◽  
Brian Glomski ◽  
Thomas R. Pauly ◽  
Thomas J. Pinnavaia
Keyword(s):  
Nonionic Surfactant ◽  
Long Range ◽  
Molecular Sieve ◽  
Mesoporous Molecular Sieve

Catalytic activity of palladium-doped silver dilute nanoalloys for formate oxidation from a theoretical perspective

2019 ◽  
Vol 21 (40) ◽  
pp. 22598-22610 ◽  
Author(s):  
Nan Zhang ◽  
Fuyi Chen ◽  
Longfei Guo
Keyword(s):  
Catalytic Activity ◽  
Oxidation Reaction ◽  
Theoretical Perspective ◽  
Single Atom ◽  
High Catalytic Activity ◽  
Formate Oxidation ◽  
First Time ◽  
Single Atom Alloys

We demonstrate for the first time that the Pd1Ag single-atom alloys exhibit a high catalytic activity for formate oxidation reaction.

Reactivities of platinum subnanocluster catalysts for the oxidation reaction of alcohols

RSC Advances ◽  
2015 ◽  
Vol 5 (122) ◽  
pp. 100693-100696 ◽  
Author(s):  
Masaki Takahashi ◽  
Takane Imaoka ◽  
Kimihisa Yamamoto
Keyword(s):  
Catalytic Activity ◽  
Oxidation Reaction ◽  
Alcohol Oxidation ◽  
Template Method ◽  
Size Dependent

The size-dependent catalytic activity for alcohol oxidation was investigated using the platinum subnanoclusters synthesized by the dendrimer template method.

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