Transalkylation of ethyl benzene with triethylbenzene over ZSM-5 zeolite catalyst

Handle URI:
http://hdl.handle.net/10754/600110
Title:
Transalkylation of ethyl benzene with triethylbenzene over ZSM-5 zeolite catalyst
Authors:
Akhtar, M. Naseem; Tukur, Nasiru M.; Al-Yassir, Nabil; Al-Khattaf, Sulaiman; Čejka, Jiří
Abstract:
Transalkylation of 1,3,5-triethylbenzene (TEB) with ethylbenzene (EB) has been studied over ZSM-5 zeolite using a riser simulator reactor with respect to optimizing DEB yield. The reaction temperature was varied from 350 to 500°C with contact time ranging from 3 to 15s to report on the effect of reaction conditions on TEB conversion, DEB selectivity and isomerization of TEB. The transalkylation of TEB with EB was compared with the reactions of pure 1,3,5-TEB and EB (disproportionation, isomerization and cracking). A synergistic effect was observed on the conversion of 1,3,5-TEB and DEB yield. The 1,3,5-TEB conversion increased from 40% to 50% with simultaneous increase in the DEB selectivity from 17% to 36% in transalkylation reaction (EB+1,3,5-TEB) as compared with the reaction of pure 1,3,5-TEB. It was found that pure 1,3,5-TEB underwent cracking reaction to produce DEB and EB. The isomerization of 1,3,5-TEB was more active at low temperature while cracking was more active at high temperature. The temperature of 350°C was observed as the optimum for production of maximum amount of DEB. Kinetic parameters for the disappearance of 1,3,5-TEB during its transformation reaction via cracking and isomerization pathways were calculated using the catalyst activity decay function based on time-on-stream (TOS). The apparent activation energies decrease in order E secondary cracking>E primary racking>E isomerization for ZSM-5 catalysts. © 2010 Elsevier B.V.
Citation:
Akhtar MN, Tukur NM, Al-Yassir N, Al-Khattaf S, Čejka J (2010) Transalkylation of ethyl benzene with triethylbenzene over ZSM-5 zeolite catalyst. Chemical Engineering Journal 163: 98–107. Available: http://dx.doi.org/10.1016/j.cej.2010.07.026.
Publisher:
Elsevier BV
Journal:
Chemical Engineering Journal
Issue Date:
Sep-2010
DOI:
10.1016/j.cej.2010.07.026
Type:
Article
ISSN:
1385-8947
Sponsors:
We would like to express our appreciations for King Abdullah University of Science and Technology (KAUST) for their financial support. The support of King Fahd University of Petroleum and Minerals (KFUPM) is also highly appreciated.
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Publications Acknowledging KAUST Support

Full metadata record

DC FieldValue Language
dc.contributor.authorAkhtar, M. Naseemen
dc.contributor.authorTukur, Nasiru M.en
dc.contributor.authorAl-Yassir, Nabilen
dc.contributor.authorAl-Khattaf, Sulaimanen
dc.contributor.authorČejka, Jiříen
dc.date.accessioned2016-02-28T07:59:05Zen
dc.date.available2016-02-28T07:59:05Zen
dc.date.issued2010-09en
dc.identifier.citationAkhtar MN, Tukur NM, Al-Yassir N, Al-Khattaf S, Čejka J (2010) Transalkylation of ethyl benzene with triethylbenzene over ZSM-5 zeolite catalyst. Chemical Engineering Journal 163: 98–107. Available: http://dx.doi.org/10.1016/j.cej.2010.07.026.en
dc.identifier.issn1385-8947en
dc.identifier.doi10.1016/j.cej.2010.07.026en
dc.identifier.urihttp://hdl.handle.net/10754/600110en
dc.description.abstractTransalkylation of 1,3,5-triethylbenzene (TEB) with ethylbenzene (EB) has been studied over ZSM-5 zeolite using a riser simulator reactor with respect to optimizing DEB yield. The reaction temperature was varied from 350 to 500°C with contact time ranging from 3 to 15s to report on the effect of reaction conditions on TEB conversion, DEB selectivity and isomerization of TEB. The transalkylation of TEB with EB was compared with the reactions of pure 1,3,5-TEB and EB (disproportionation, isomerization and cracking). A synergistic effect was observed on the conversion of 1,3,5-TEB and DEB yield. The 1,3,5-TEB conversion increased from 40% to 50% with simultaneous increase in the DEB selectivity from 17% to 36% in transalkylation reaction (EB+1,3,5-TEB) as compared with the reaction of pure 1,3,5-TEB. It was found that pure 1,3,5-TEB underwent cracking reaction to produce DEB and EB. The isomerization of 1,3,5-TEB was more active at low temperature while cracking was more active at high temperature. The temperature of 350°C was observed as the optimum for production of maximum amount of DEB. Kinetic parameters for the disappearance of 1,3,5-TEB during its transformation reaction via cracking and isomerization pathways were calculated using the catalyst activity decay function based on time-on-stream (TOS). The apparent activation energies decrease in order E secondary cracking>E primary racking>E isomerization for ZSM-5 catalysts. © 2010 Elsevier B.V.en
dc.description.sponsorshipWe would like to express our appreciations for King Abdullah University of Science and Technology (KAUST) for their financial support. The support of King Fahd University of Petroleum and Minerals (KFUPM) is also highly appreciated.en
dc.publisherElsevier BVen
dc.subjectCrackingen
dc.subjectDisproportionationen
dc.subjectEthylbenzeneen
dc.subjectFCC-USYen
dc.subjectIsomerizationen
dc.subjectKinetic modelingen
dc.subjectTransalkylationen
dc.subjectTriethylbenzeneen
dc.subjectZSM-5en
dc.titleTransalkylation of ethyl benzene with triethylbenzene over ZSM-5 zeolite catalysten
dc.typeArticleen
dc.identifier.journalChemical Engineering Journalen
dc.contributor.institutionSABIC E and PM, P.O. Box 11425, Jubail Industrial City 31961, Saudi Arabiaen
dc.contributor.institutionInstitute of Physical Chemistry, Academy of Sciences of the Czech Republic, Dolejškova 3, 182 23 Prague 8, Czech Republicen
kaust.authorAkhtar, M. Naseemen
kaust.authorAl-Yassir, Nabilen
kaust.authorAl-Khattaf, Sulaimanen
kaust.grant.fundedcenterKAUST Center In Development at KFUPMen
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