About: Selective synthesis of linear alkylbenzene by alkylation of benzene with 1-dodecene over desilicated zeolites

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About: Selective synthesis of linear alkylbenzene by alkylation of benzene with 1-dodecene over desilicated zeolites Goto Sponge NotDistinct Permalink

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rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
Description	The alkylation of benzene with 1-dodecene to linear alkylbenzenes (LAB) was investigated over 12-ring zeolites MOR, BEA, and FAU with varying framework topologies and Si/Alratios. The reaction was carried out under a high-pressure, 20 bar, in a fixed-bed flow reactor at 140 degrees C, using WHSV 4 h-1, benzene/1 dodecene molar ratio of 6.0 and time-on-stream of 6.0 h. In contrast to MOR and BEA zeolites, FAU exhibited the lowest selectivity (24%) to the desired 2-phenyl dodecane (2-LAB) due to its large cavities. The MOR and BEA with different Si/Alratios were further desilicated using alkali-metal treatments (0.2 M and 0.05 M NaOH) to create hierarchical porous structure. The desilication of both zeolites improved the conversion of 1-dodecene and the selectivity to 2-LAB. The excellent stability resulting from desilication is attributed to a better diffusivity of the LAB isomers, shortening of real contact time, due to the enhanced mesporous structure in both zeolites and the higher Lewis acidity. The selectivity to 2-LAB increased to 70% over desilicated MOR (Si/Al ratio = 20) compared with a selectivity of 35% over desilicated BEA (Si/Al ratio = 24). The alkylation of benzene with 1-dodecene to linear alkylbenzenes (LAB) was investigated over 12-ring zeolites MOR, BEA, and FAU with varying framework topologies and Si/Alratios. The reaction was carried out under a high-pressure, 20 bar, in a fixed-bed flow reactor at 140 degrees C, using WHSV 4 h-1, benzene/1 dodecene molar ratio of 6.0 and time-on-stream of 6.0 h. In contrast to MOR and BEA zeolites, FAU exhibited the lowest selectivity (24%) to the desired 2-phenyl dodecane (2-LAB) due to its large cavities. The MOR and BEA with different Si/Alratios were further desilicated using alkali-metal treatments (0.2 M and 0.05 M NaOH) to create hierarchical porous structure. The desilication of both zeolites improved the conversion of 1-dodecene and the selectivity to 2-LAB. The excellent stability resulting from desilication is attributed to a better diffusivity of the LAB isomers, shortening of real contact time, due to the enhanced mesporous structure in both zeolites and the higher Lewis acidity. The selectivity to 2-LAB increased to 70% over desilicated MOR (Si/Al ratio = 20) compared with a selectivity of 35% over desilicated BEA (Si/Al ratio = 24). (en)
Title	Selective synthesis of linear alkylbenzene by alkylation of benzene with 1-dodecene over desilicated zeolites Selective synthesis of linear alkylbenzene by alkylation of benzene with 1-dodecene over desilicated zeolites (en)
skos:prefLabel	Selective synthesis of linear alkylbenzene by alkylation of benzene with 1-dodecene over desilicated zeolites Selective synthesis of linear alkylbenzene by alkylation of benzene with 1-dodecene over desilicated zeolites (en)
skos:notation	RIV/61388955:_____/14:00427874!RIV15-GA0-61388955
http://linked.open...avai/riv/aktivita	I P
http://linked.open...avai/riv/aktivity	I, P(GBP106/12/G015)
http://linked.open...iv/cisloPeriodika	MAY 2014
http://linked.open...vai/riv/dodaniDat	2015
http://linked.open...aciTvurceVysledku	Čejka, Jiří
http://linked.open.../riv/druhVysledku	J - Článek v odborném periodiku
http://linked.open...iv/duvernostUdaju	S - Úplné a pravdivé údaje nepodléhající ochraně podle zvláštních právních předpisů
http://linked.open...titaPredkladatele	Ústav fyzikální chemie J. Heyrovského AV ČR, v.v.i.
http://linked.open...dnocenehoVysledku	44302
http://linked.open...ai/riv/idVysledku	RIV/61388955:_____/14:00427874
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	zeolites; benzene alkylation; long-chain olefin (en)
http://linked.open.../riv/klicoveSlovo	benzene alkylation long-chain olefin zeolites
http://linked.open...odStatuVydavatele	NL - Nizozemsko
http://linked.open...ontrolniKodProRIV	[8B3D40570EC4]
http://linked.open...i/riv/nazevZdroje	Catalysis Today
http://linked.open...in/vavai/riv/obor	CF
http://linked.open...ichTvurcuVysledku	1 (xsd:int)
http://linked.open...cetTvurcuVysledku	6 (xsd:int)
http://linked.open...vavai/riv/projekt	Intelligent design of nanoporous adsorbents and catalysts
http://linked.open...UplatneniVysledku	2014
http://linked.open...v/svazekPeriodika	227
http://linked.open...iv/tvurceVysledku	Aitani, A. Al-Khattaf, S. Čejka, Jiří Aslam, W. Jermy, B. R. Siddiqui, M. A. B.
http://linked.open...ain/vavai/riv/wos	000332412900026
issn	0920-5861
number of pages	11 (xsd:int)
http://bibframe.org/vocab/doi	10.1016/j.cattod.2013.10.015

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