Shape selectivity of hydrothermally treated H-ZSM-5 in toluene disproportionation and xylene isomerization

Autor:	H.-G. Jerschkewitz, E. Schreier, J. Völter, U. Kürschner
Rok vydání:	1990
Předmět:	inorganic chemicals Xylene Inorganic chemistry General Engineering chemistry.chemical_element Disproportionation respiratory system complex mixtures Toluene chemistry.chemical_compound chemistry Nitric acid Aluminium ZSM-5 Selectivity Isomerization
Zdroj:	Applied Catalysis. 57:167-177
ISSN:	0166-9834
Popis:	Controlled hydrothermal treatment of H-ZSM-5 at 500°C causes a transformation of framework into non-framework aluminium, as indicated by means of cation exchange and IR spectroscopy. After treatment with nitric acid, partial extraction of non-framework aluminium was observed. The non-framework aluminium-containing samples showed an enhanced p-xylene selectivity in the catalytic disproportionation of toluene and in the isomerization of m-xylene. The subsequently extracted samples had lost this property. A model of the decisive role of non-framework aluminium in shape selectivity is discussed.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::9e95f0631b04148a1c9f94f8985b7b0b https://doi.org/10.1016/s0166-9834(00)80730-7 Zobrazit plný text záznamu