Catalytic reactions of chlorofluoroethanes at fluorinated alumina and chromia aerogels and xerogels

Autor:	Erhard Kemnitz, Mahmood Nickkho-Amiry, Hamid Bozorgzadeh, Tomaž Skapin, John M. Winfield
Rok vydání:	2001
Předmět:	Organic Chemistry Inorganic chemistry chemistry.chemical_element Aerogel Photochemistry Biochemistry Chromia Catalysis Inorganic Chemistry Chromium chemistry Aluminium Halogen Environmental Chemistry Physical and Theoretical Chemistry Bond energy Isomerization
Zdroj:	Journal of Fluorine Chemistry. 110:181-189
ISSN:	0022-1139
DOI:	10.1016/s0022-1139(01)00427-4
Popis:	The differences in the dynamic behaviour of 1,1,2-trichlorotrifluoroethane over fluorinated alumina or chromia catalysts at moderate temperatures are significant. Alumina-based catalysts favour the isomerization of CCl 2 FCClF 2 followed by the dismutation of CCl 3 CF 3 so formed. Fluorinated chromias are less selective since halogen exchange and isomerization reactions both occur. An explanation in terms of the differences in AlX, X=Cl or F, bond energies compared with their CrX counterparts is suggested. The identity of the catalyst precursor has little effect in the chromium case and no effect in the case of aluminium.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::ca348cf1a8be2a907823e9f78925a798 https://doi.org/10.1016/s0022-1139(01)00427-4 Zobrazit plný text záznamu Full Text from ScienceDirect