Selective esterification of glycerol to bioadditives over heteropoly tungstate supported on Cs-containing zirconia catalysts

Autor:	K. Jagadeeswaraiah, P.S. Sai Prasad, M. Balaraju, N. Lingaiah
Rok vydání:	2010
Předmět:	inorganic chemicals chemistry.chemical_classification Process Chemistry and Technology Carboxylic acid Inorganic chemistry Heterogeneous catalysis Catalysis Acetic acid chemistry.chemical_compound chemistry Tungstate Desorption Glycerol Cubic zirconia
Zdroj:	Applied Catalysis A: General. 386:166-170
ISSN:	0926-860X
DOI:	10.1016/j.apcata.2010.07.046
Popis:	Esterification of glycerol with acetic acid was carried out over tungstophosphoric acid (TPA) supported on Cs-containing zirconia. The catalysts were prepared by impregnation method and characterized by FT-infrared spectroscopy, X-ray diffraction and temperature program desorption of NH 3 . The catalysts exhibited more than 90% conversion within a short reaction time. The catalytic activity depends on the amount of exchangeable Cs with TPA on zirconia, which is in tern related to the acidity of the catalysts. The acidity of the catalysts varied with the presence of residual protons of TPA. The effects of various parameters, such as reaction temperature, catalyst concentration and molar ratio of glycerol to acetic acid, were studied and optimized reaction conditions are established.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::1a01802a83d96483993401f61e86a340 https://doi.org/10.1016/j.apcata.2010.07.046 Zobrazit plný text záznamu Full Text from ScienceDirect