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Transalkylation of toluene with trimethylbenzenes over large-pore zeolites

SYSNO ASEP	0342472
Document Type	J - Journal Article
R&D Document Type	Journal Article
Subsidiary J	Článek ve WOS
Title	Transalkylation of toluene with trimethylbenzenes over large-pore zeolites
Author(s)	Krejčí, Andrea (UFCH-W) Al-Khattal, S. (SA) Ashraf Ali, M. (SA) Voláková, Martina (UFCH-W) Čejka, Jiří (UFCH-W)_{RID, ORCID, SAI}
Source Title	Applied Catalysis A - General. - : ELSEVIER SCIENCE BV - ISSN 0926-860X Roč. 377, 1-2 (2010), s. 99-106
Number of pages	8 s.
Language	eng - English
Country	NL - Netherlands
Keywords	transalkylation ; toluene ; zeolites Beta
Subject RIV	CF - Physical ; Theoretical Chemistry
R&D Projects	1QS400400560 GA AV ČR - Academy of Sciences of the Czech Republic (AV ČR)
CEZ	AV0Z40400503 - UFCH-W (2005-2011)
UT WOS	000276419000014
DOI	10.1016/j.apcata.2010.01.026
Annotation	Zeolites Beta, mordenite and Y were evaluated for their activity in transalkylation reaction of toluene with trimethylbenzenes. Zeolite Beta was found to possess the highest conversion in toluene-trimethylbenzene transalkylation as well as a higher stability in time-on-stream compared with mordenite and zeolite Y. The effect of Si/Al ratio in zeolite Beta was evaluated and it was found that transalkylation activity and xylene yields increase with decreasing Si/Al ratio. Zeolite Beta with the lowest Si/Al ratio of 12.5 (the highest concentration of active sites) exhibited the highest 1,2,4-trimethylbenzene (124TMB) conversion and maximum xylene yield. The highest xylene yield was obtained at optimum equimolar ratio (1:1) of 124TMB to toluene. With increasing 124TMB concentration in the feed, the conversion of 124TMB and xylene yield decreased while toluene conversion simultaneously increased.
Workplace	J. Heyrovsky Institute of Physical Chemistry
Contact	Michaela Knapová, michaela.knapova@jh-inst.cas.cz, Tel.: 266 053 196
Year of Publishing	2011

Number of the records: 1