Radius of Curvature Effect on the Selective Oxidation of Cyclohexene Over Highly Ordered V-MCM-41

Autor:	Hui Sun, Chuan Wang, Gary L. Haller, Yuan Chen, Yanhui Yang, Qinghu Tang, Shuangquan Hu
Rok vydání:	2007
Předmět:	Chemistry Diffusion Inorganic chemistry Analytical chemistry Cyclohexene Vanadium chemistry.chemical_element General Chemistry Molecular sieve Catalysis Radius of curvature (optics) Reaction rate chemistry.chemical_compound Mesoporous material
Zdroj:	Catalysis Letters. 117:25-33
ISSN:	1572-879X 1011-372X
DOI:	10.1007/s10562-007-9185-7
Popis:	V-MCM-41 mesoporous molecular sieves with similar vanadium content (∼0.6 wt.%) and surface area (∼700 m2/g) but different pore sizes (from 1.8 to 2.9 nm) were synthesized. A pore wall radius of curvature effect on the initial rate of catalytic reaction existed when the cyclohexene epoxidation was used as a probe reaction, the larger the pore size, the higher the initial reaction rate. However, the turnover frequencies over a long period (72 h) were constant respect to different pore diameters, which was probably due to the strong pore diffusion limitation in the liquid environment.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::06e4f70cd6637b49ac79c98adfe2a35e https://doi.org/10.1007/s10562-007-9185-7 Zobrazit plný text záznamu Plný text ve formátu PDF