Sensitivity of distillation column design to uncertainties in vapor-liquid equilibrium information

Peridis, S; Magoulas, K; Tassios, D

dc.contributor.author	Peridis, S	en
dc.contributor.author	Magoulas, K	en
dc.contributor.author	Tassios, D	en
dc.date.accessioned	2014-03-01T01:09:32Z
dc.date.available	2014-03-01T01:09:32Z
dc.date.issued	1993	en
dc.identifier.issn	0149-6395	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/11062
dc.subject	Distillation Columns	en
dc.subject	Vapor Liquid Equilibrium	en
dc.subject.classification	Chemistry, Multidisciplinary	en
dc.subject.classification	Engineering, Chemical	en
dc.subject.other	Liquids	en
dc.subject.other	Phase equilibria	en
dc.subject.other	Vapors	en
dc.subject.other	Column design	en
dc.subject.other	Design sensitivity	en
dc.subject.other	Uncertainties	en
dc.subject.other	Vapor liquid equilibrium	en
dc.subject.other	Distillation columns	en
dc.title	Sensitivity of distillation column design to uncertainties in vapor-liquid equilibrium information	en
heal.type	journalArticle	en
heal.identifier.primary	10.1080/01496399308019040	en
heal.identifier.secondary	http://dx.doi.org/10.1080/01496399308019040	en
heal.language	English	en
heal.publicationDate	1993	en
heal.abstract	The sensitivity of distillation column design [number of stages (N) and reflux ratio (R)] to changes in the mean relative volatility (alpha) across the column is examined to demonstrate the effect that uncertainties in the required vapor-liquid equilibrium (VLE) information has on N and R. The results, presented in graphic form for different levels of alpha, provide the design engineer with a simple method of establishing the required degree of accuracy in the VLE information used for a given separation. The sensitivity increases, as expected, with decreasing values of alpha, becoming very pronounced for difficult separations, but it is significant even for easier ones. Thus, for alpha = 1.1, a 2% reduction in alpha leads to a 80% increase in N or an over 120% increase in R, while for alpha = 1.5 the corresponding increases are about 20 and 25%, respectively. The dependence of this sensitivity on design parameters, such as the ratio of the key components in the feed, feed thermal condition, etc., is also examined. The effect of the sources of uncertainty in the VLE information: the values of the interaction coefficient and, on occasion, of the critical properties and acentric factor, is then demonstrated with two examples.	en
heal.publisher	MARCEL DEKKER INC	en
heal.journalName	Separation Science and Technology	en
dc.identifier.doi	10.1080/01496399308019040	en
dc.identifier.isi	ISI:A1993LH31100007	en
dc.identifier.volume	28	en
dc.identifier.issue	9	en
dc.identifier.spage	1753	en
dc.identifier.epage	1767	en