Operating pressure and gas-phase properties effects on the liquid flow nonidealities in small-scale upflow reactors

Thanos, A; Menagias, P; Galtier, P; Papayannakos, N

dc.contributor.author	Thanos, A	en
dc.contributor.author	Menagias, P	en
dc.contributor.author	Galtier, P	en
dc.contributor.author	Papayannakos, N	en
dc.date.accessioned	2014-03-01T01:14:59Z
dc.date.available	2014-03-01T01:14:59Z
dc.date.issued	1999	en
dc.identifier.issn	0888-5885	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/13283
dc.subject.classification	Engineering, Chemical	en
dc.subject.other	Composition effects	en
dc.subject.other	Pressure effects	en
dc.subject.other	Two phase flow	en
dc.subject.other	Hydrotreatment reactors	en
dc.subject.other	Peclet number	en
dc.subject.other	Chemical reactors	en
dc.subject.other	gas-liquid two-phase flow	en
dc.subject.other	hold-up	en
dc.subject.other	Peclet number	en
dc.subject.other	pressure	en
dc.subject.other	reactor	en
dc.subject.other	residence time	en
dc.subject.other	ambient air	en
dc.subject.other	article	en
dc.subject.other	catalysis	en
dc.subject.other	chemical reaction kinetics	en
dc.subject.other	extraction	en
dc.subject.other	flow rate	en
dc.subject.other	hydrodynamics	en
dc.subject.other	liquid liquid extraction	en
dc.subject.other	membrane reactor	en
dc.subject.other	volumetry	en
dc.title	Operating pressure and gas-phase properties effects on the liquid flow nonidealities in small-scale upflow reactors	en
heal.type	journalArticle	en
heal.identifier.primary	10.1021/ie990242b	en
heal.identifier.secondary	http://dx.doi.org/10.1021/ie990242b	en
heal.language	English	en
heal.publicationDate	1999	en
heal.abstract	Pilot-scale hydrotreatment reactors often operate with gas-liquid upflow. For this type of operation there is a lack of information concerning the nonideal characteristics of the liquid flow, especially at elevated pressures. In this study, the Peclet number and liquid holdup of a pilot- scale upflow reactor were derived by residence time distribution experiments. The experiments were carried out at various operating pressures with different feed gases. The liquid-phase mixing was found to be identical for constant feed volumetric superficial velocities calculated at the system pressure. The liquid holdup diminished when elevated pressures were used. The use of very high gas flow rates during the shift of the operating pressure can intensify the liquid-phase nonidealities.Pilot-scale hydrotreatment reactors often operate with gas-liquid upflow. For this type of operation there is a lack of information concerning the nonideal characteristics of the liquid flow, especially at elevated pressures. In this study, the Peclet number and liquid holdup of a pilot-scale upflow reactor were derived by residence time distribution experiments. The experiments were carried out at various operating pressures with different feed gases. The liquid-phase mixing was found to be identical for constant feed volumetric superficial velocities calculated at the system pressure. The liquid holdup diminished When elevated pressures were used. The use of very high gas flow rates during the shift of the operating pressure can intensify the liquid-phase nonidealities.	en
heal.publisher	ACS, Washington, DC, United States	en
heal.journalName	Industrial and Engineering Chemistry Research	en
dc.identifier.doi	10.1021/ie990242b	en
dc.identifier.isi	ISI:000082973100027	en
dc.identifier.volume	38	en
dc.identifier.issue	10	en
dc.identifier.spage	3817	en
dc.identifier.epage	3821	en