Počet záznamů: 1
Cracking of pentenes to C.sub.2./sub.-C.sub.4./sub. light olefins over zeolites and zeotypes - Role of topology and acid site strength and concentration
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SYSNO ASEP 0028541 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Ostatní články Název Cracking of pentenes to C2-C4 light olefins over zeolites and zeotypes - Role of topology and acid site strength and concentration Překlad názvu Krakování pentenů na C2-C4 lehké olefiny na zeolitech a zeotypech. Role topologie a síly kyselosti a koncentrace kyselých center Tvůrce(i) Bortnovsky, Oleg (UFCH-W)
Sazama, Petr (UFCH-W) RID, ORCID
Wichterlová, Blanka (UFCH-W) RIDZdroj.dok. Applied Catalysis A - General. - : ELSEVIER SCIENCE BV - ISSN 0926-860X
Roč. 287, č. 2 (2005), s. 203-213Poč.str. 11 s. Jazyk dok. eng - angličtina Země vyd. NL - Nizozemsko Klíč. slova pentene cracking ; zeolite topology ; acid site concentration ; ZSM-5 Vědní obor RIV CF - Fyzikální chemie a teoretická chemie CEP IBS4040015 GA AV ČR - Akademie věd CEZ AV0Z40400503 - UFCH-W (2005-2011) Anotace The cracking of 2-methyl-2-butene was canied out as a model reaction Of C-4(+) olefins cracking by using of various zeolite and zeotype catalysts to obtain light olefins, such as ethylene and propylene. Only ZSM-5 and ZSM-11 zeolites with 10-MRP with intersecting channels and acid sites concentration ranging between 0.03 and 0.1 mmol/g exhibit high and stable selectivity to C-2-C-4 olefins at high conversion level. Active and selective catalysts were prepared by three different methods: direct synthesis of H-ZSM-5 with high Si/Al ratio, steaming of HZSM-5 and "partial" ammonium ion exchange of Na-ZSM-5. Neither H-(AI)ZSM-5 with high concentration of acid sites nor H-(Fe)ZSM-5 are suitable catalysts as they catalyze hydrogen-transfer reactions yielding paraffins and aromatics, showing the importance of low concentration and high strength of acid sites for cracking activity-selectivity. Pracoviště Ústav fyzikální chemie J.Heyrovského Kontakt Michaela Knapová, michaela.knapova@jh-inst.cas.cz, Tel.: 266 053 196 Rok sběru 2006
Počet záznamů: 1