Role of Manganese Oxide Octahedral Molecular Sieves in Styrene Epoxidation

Autor:	Kinga A. Malinger, Yun-Shuang Ding, Ruma Ghosh, Josanlet C. Villegas, Xiongfei Shen, Steven L. Suib
Rok vydání:	2006
Předmět:	chemistry.chemical_compound Octahedron Chemistry Inorganic chemistry Materials Chemistry Physical and Theoretical Chemistry Manganese oxide Molecular sieve Surfaces Coatings and Films Styrene
Zdroj:	The Journal of Physical Chemistry B. 110:7592-7599
ISSN:	1520-5207 1520-6106
DOI:	10.1021/jp056961n
Popis:	Manganese oxide octahedral molecular sieves having 2 x 2 tunnel structure (OMS-2) and synthesized by different methods were used for studying styrene oxidation with tert-butyl hydroperoxide (TBHP) as the oxidant. The catalytic activity of the as-synthesized OMS-2 materials was investigated. The physical and chemical properties of the OMS-2 materials are related to their activity in styrene oxidation. This particular study emphasizes the acid-base properties and the porous nature of these materials, and their role in styrene oxidation. Results of styrene oxidation reveal that acidity coupled with high porosity play a crucial role in these catalytic reactions. A desired acidity coupled with pore volume found in OMS-2 synthesized by reflux methods (OMS-2(R)) and high-temperature methods (OMS-2(HT)) produces materials with higher styrene conversion and styrene oxide selectivity when compared with OMS-2 synthesized by solvent free (OMS-2(S)), microwave (OMS-2(MW)), or hydrothermal methods (OMS-2(HY)). Transition metal doped OMS-2 catalysts show better selectivity of styrene oxide when compared to their undoped catalysts.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a0da6cab54b456368f7cb47142bb44e4 https://doi.org/10.1021/jp056961n Zobrazit plný text záznamu