Solid acids as catalysts for cumene cracking: heteropolyacids as compared with zeolites. Part. 1. Reaction and coke formation

• Autorzy: Małecka-Lubańska A. , Poźniczek J.
• Języki publikacji: EN

Abstrakty

EN

The catalytic properties of dodecatungstosilicic acid H(4)SiW(12)O(40 (HPA) and NaHY-88 zeolite in cumene cracking reaction were compared. HPA exhibits catalytic activity at temperatures lower (below 160° C) than NaHY-88 (above 170°C) but its deacti-vation is faster. Mass balance shows that in both cases a certain deficit exists due to the formation of carbonaceous deposits. It has been shown that in the formation of deposits both chain hydrocarbons ("propylene deposit") and aromatic ones ("cumene deposit") participate. In the case of both catalysts the course of catalytic reaction and deposit formation were influenced by the contact time. The results enabled us also to propose some conclusions concerning the geometry of deposit distribution in both catalysts.

Słowa kluczowe

EN

cumene cracking; heteropoly acid; zeolite; coke

PL

kraking; kumen; zeolit; koks

• Wydawca: Centrum Upowszechniania Nauki PAN
• Czasopismo: Bulletin of the Polish Academy of Sciences. Chemistry
• Rocznik: 2002
• Tom: Vol. 50, No.2
• Strony: 219--236
• Opis fizyczny: Bibliogr. 18 poz.

Twórcy

autor

Małecka-Lubańska A.

autor

Poźniczek J.

• Institute of Catalysis and Surface Chemistry, Polish Academy of Sciences, Polyoxometalate Laboratory, ul. Niezapominajek 8, 30-239 Kraków, Poland (Instytut Katalizy i Fizykochemii Powierzchni PAN),