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The effect of alkylation route on ethyltoluene production over different structural types of zeolites
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SYSNO ASEP 0467323 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název The effect of alkylation route on ethyltoluene production over different structural types of zeolites Tvůrce(i) Ogunbadejo, B. (SA)
Aitani, A. (SA)
Čejka, Jiří (UFCH-W) RID, ORCID, SAI
Kubů, Martin (UFCH-W) RID
Al-Khattaf, S. (SA)Zdroj.dok. Chemical Engineering Journal. - : Elsevier - ISSN 1385-8947
Roč. 306, DEC 2016 (2016), s. 1071-1080Poč.str. 10 s. Jazyk dok. eng - angličtina Země vyd. NL - Nizozemsko Klíč. slova ethyltoluenes ; alkylation ; toluene Vědní obor RIV CF - Fyzikální chemie a teoretická chemie CEP GBP106/12/G015 GA ČR - Grantová agentura ČR Institucionální podpora UFCH-W - RVO:61388955 UT WOS 000386420700119 EID SCOPUS 84982094836 DOI 10.1016/j.cej.2016.08.019 Anotace Ethyltoluenes (ET) synthesis via different alkylation routes; toluene with ethanol and ethylbenzene (EB) with methanol, was investigated over zeolites with three-dimensional (3D) pore system i.e. SSZ-33, TNU-9, ZSM-5, IM-5, and one-dimensional zeolite MOR in a fluidized-bed reactor in the temperature range 250–350 °C for reaction times of 5–20 s. Alkylation of toluene with ethanol provided higher yields and selectivities to ethyltoluenes over all zeolites. The maximum ET yield achieved for toluene ethylation was 13.7 wt.% using IM-5 and ZSM-5 whereas 12.5 wt.% was obtained in EB methylation over SSZ-33. SSZ-33 provided the highest ET-selectivity of ∼50% due to the combine effect of its 3D topology and 12-ring channels. In contrast to ET selectivity, p-ethyltoluene selectivity was almost the same, ∼26%, irrespective of the zeolite topology. Kinetic studies of toluene ethylation over the zeolites were conducted using power law coupled with time-on-stream deactivation model. A satisfactory correlation between experimental data and the model result was achieved. The activation energy of the various zeolites used for the alkylation of toluene to ET decreased in the order: IM-5 (58.2 kJ/mol) > SSZ-33 (39.7 kJ/mol) > TNU-9 (27.3 kJ/mol) > MOR (20.2 kJ/mol) > ZSM-5 (17.0 kJ/mol) which was explained by different acid strength and nature of the zeolites. Pracoviště Ústav fyzikální chemie J.Heyrovského Kontakt Michaela Knapová, michaela.knapova@jh-inst.cas.cz, Tel.: 266 053 196 Rok sběru 2017
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