Removal of n-butyl mercaptan using stripping with an inert gas: A nonequilibrium approach via mass balances

Matsis, V; Georgantas, D; Grigoropoulou, H

dc.contributor.author	Matsis, V	en
dc.contributor.author	Georgantas, D	en
dc.contributor.author	Grigoropoulou, H	en
dc.date.accessioned	2014-03-01T01:25:04Z
dc.date.available	2014-03-01T01:25:04Z
dc.date.issued	2006	en
dc.identifier.issn	0888-5885	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/17530
dc.subject	Mass Balance	en
dc.subject.classification	Engineering, Chemical	en
dc.subject.other	Alkalinity	en
dc.subject.other	Concentration (process)	en
dc.subject.other	Inert gases	en
dc.subject.other	Nitrogen	en
dc.subject.other	pH effects	en
dc.subject.other	Solutions	en
dc.subject.other	Chemical equilibrium	en
dc.subject.other	Gas stripping	en
dc.subject.other	Mass balance	en
dc.subject.other	n-butyl mercaptan	en
dc.subject.other	Removal	en
dc.subject.other	Alkalinity	en
dc.subject.other	Concentration (process)	en
dc.subject.other	Inert gases	en
dc.subject.other	Nitrogen	en
dc.subject.other	pH effects	en
dc.subject.other	Removal	en
dc.subject.other	Solutions	en
dc.title	Removal of n-butyl mercaptan using stripping with an inert gas: A nonequilibrium approach via mass balances	en
heal.type	journalArticle	en
heal.identifier.primary	10.1021/ie050882g	en
heal.identifier.secondary	http://dx.doi.org/10.1021/ie050882g	en
heal.language	English	en
heal.publicationDate	2006	en
heal.abstract	The stripping of n-butyl mercaptan (RSH) from neutral and alkaline aqueous solution with gaseous nitrogen is investigated at ambient temperature and pressure in a semibatch system. A model considering the dynamic state, the thiol mass balance, the effect of RSH dissociation, and the deviation from chemical equilibrium is developed and solved numerically. The assumption of chemical equilibrium between undissociated thiol and its ion (RS-) is valid at neutral pH, but at alkaline conditions, RS- → RSH is the rate controlling step, with k = 5 × 10-6 s-1 at 301 K and pH 11.7. The effectiveness of inert gas stripping is mainly governed by thiol's hydrophobic nature and its neutral/ionic form speciation. At pH values below 8.5, thiol concentration falls in an exponential form, whereas at pH values above 10.5, it tends toward a linear form. The mass balance model is extremely sensitive to uncertainty in γ∞, whereas k governs thiol emission rate out of the liquid system. © 2006 American Chemical Society.	en
heal.publisher	AMER CHEMICAL SOC	en
heal.journalName	Industrial and Engineering Chemistry Research	en
dc.identifier.doi	10.1021/ie050882g	en
dc.identifier.isi	ISI:000235699800023	en
dc.identifier.volume	45	en
dc.identifier.issue	5	en
dc.identifier.spage	1766	en
dc.identifier.epage	1773	en