Gas-liquid mass transfer in a bench-scale trickle bed reactor used for benzene hydrogenation

Metaxas, K; Papayannakos, N

dc.contributor.author	Metaxas, K	en
dc.contributor.author	Papayannakos, N	en
dc.date.accessioned	2014-03-01T01:28:30Z
dc.date.available	2014-03-01T01:28:30Z
dc.date.issued	2008	en
dc.identifier.issn	0930-7516	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/18857
dc.subject	Benzene hydrogenation	en
dc.subject	Mass transfer	en
dc.subject	Trickle bed reactors	en
dc.subject.classification	Engineering, Chemical	en
dc.subject.other	Benzene	en
dc.subject.other	Catalysis	en
dc.subject.other	Chemical reactors	en
dc.subject.other	Gases	en
dc.subject.other	Hydrogen	en
dc.subject.other	Hydrogenation	en
dc.subject.other	Mass transfer	en
dc.subject.other	Phase equilibria	en
dc.subject.other	Reaction kinetics	en
dc.subject.other	Silicon carbide	en
dc.subject.other	Velocity	en
dc.subject.other	Wetting	en
dc.subject.other	Axial dispersions	en
dc.subject.other	Benzene hydrogenation	en
dc.subject.other	Catalyst beds	en
dc.subject.other	Catalyst particles	en
dc.subject.other	Catalyst wetting	en
dc.subject.other	External mass transfer coefficients	en
dc.subject.other	Fine particles	en
dc.subject.other	Gas liquids	en
dc.subject.other	Gas superficial velocities	en
dc.subject.other	Gas velocities	en
dc.subject.other	Gas-liquid mass transfers	en
dc.subject.other	Heterogeneous models	en
dc.subject.other	Internal mass transfers	en
dc.subject.other	Liquid equilibriums	en
dc.subject.other	Mass transfer coefficients	en
dc.subject.other	Mass transfer limitations	en
dc.subject.other	Reactor simulations	en
dc.subject.other	Transfer resistances	en
dc.subject.other	Trickle bed reactors	en
dc.subject.other	Phase interfaces	en
dc.title	Gas-liquid mass transfer in a bench-scale trickle bed reactor used for benzene hydrogenation	en
heal.type	journalArticle	en
heal.identifier.primary	10.1002/ceat.200800107	en
heal.identifier.secondary	http://dx.doi.org/10.1002/ceat.200800107	en
heal.language	English	en
heal.publicationDate	2008	en
heal.abstract	The gas-liquid mass transfer coefficients (MTCs) of a trickle bed reactor used for the study of benzene hydrogenation were investigated. The Ni/Al2O3 catalyst bed was diluted with a coarse-grained inert carborundum (SiC) particle catalyst. Gas-liquid mass transfer coefficients were estimated by using a heterogeneous model for reactor simulation, incorporating reaction kinetics, vapor-liquid equilibrium, and catalyst particle internal mass transfer apart from gas-liquid interface mass transfer. The effects of liquid axial dispersion and the catalyst wetting efficiency are shown to be negligible. Partial external mass transfer coefficients are correlated with gas superficial velocity, and comparison between them and those obtained from experiments conducted on a bed diluted with fine particles is also presented. On both sides of the gas-liquid interface the hydrogen mass transfer coefficient is higher than the corresponding benzene one and both increase significantly with gas velocity. The gas-side mass transfer limitations appear to be higher in the case of dilution with fine particles. On the liquid side, the mass transfer resistances are higher in the case of dilution with coarse inerts for gas velocities up to 3 · 10-2 cm/sec, while for higher gas velocities this was inversed and higher mass transfer limitations were obtained for the beds diluted with fine inerts. © 2008 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim.	en
heal.publisher	WILEY-V C H VERLAG GMBH	en
heal.journalName	Chemical Engineering and Technology	en
dc.identifier.doi	10.1002/ceat.200800107	en
dc.identifier.isi	ISI:000260206200004	en
dc.identifier.volume	31	en
dc.identifier.issue	10	en
dc.identifier.spage	1410	en
dc.identifier.epage	1417	en