The rate of photocatalytic oxidation of aromatic volatile organic compounds in the gas-phase

Boulamanti, AK; Korologos, CA; Philippopoulos, CJ

dc.contributor.author	Boulamanti, AK	en
dc.contributor.author	Korologos, CA	en
dc.contributor.author	Philippopoulos, CJ	en
dc.date.accessioned	2014-03-01T01:29:20Z
dc.date.available	2014-03-01T01:29:20Z
dc.date.issued	2008	en
dc.identifier.issn	1352-2310	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/19229
dc.subject	Aromatic VOCs	en
dc.subject	Langmuir-Hinshelwood kinetics	en
dc.subject	Molecular structure	en
dc.subject	Titanium dioxide	en
dc.subject.classification	Environmental Sciences	en
dc.subject.classification	Meteorology & Atmospheric Sciences	en
dc.subject.other	Aromatic compounds	en
dc.subject.other	Aromatic hydrocarbons	en
dc.subject.other	Benzene	en
dc.subject.other	Catalyst deactivation	en
dc.subject.other	Catalyst poisoning	en
dc.subject.other	Chemical oxygen demand	en
dc.subject.other	Ethylbenzene	en
dc.subject.other	Organic compounds	en
dc.subject.other	Oxidation	en
dc.subject.other	Photocatalysis	en
dc.subject.other	Reaction kinetics	en
dc.subject.other	Reaction rates	en
dc.subject.other	Surface reactions	en
dc.subject.other	Titanium dioxide	en
dc.subject.other	Titanium oxides	en
dc.subject.other	Toluene	en
dc.subject.other	Volatile organic compounds	en
dc.subject.other	Xylene	en
dc.subject.other	Ambient temperatures	en
dc.subject.other	Aromatic species	en
dc.subject.other	Aromatic VOCs	en
dc.subject.other	Gas-phase	en
dc.subject.other	Gas-solid	en
dc.subject.other	Heterogeneous photocatalytic oxidation	en
dc.subject.other	Langmuir-Hinshelwood	en
dc.subject.other	Langmuir-Hinshelwood kinetics	en
dc.subject.other	Molecular structure	en
dc.subject.other	O-xylene	en
dc.subject.other	p-Xylene	en
dc.subject.other	Parts per million	en
dc.subject.other	Photo-catalytic oxidation	en
dc.subject.other	Residence time	en
dc.subject.other	Tank reactors	en
dc.subject.other	Titania	en
dc.subject.other	Rate constants	en
dc.subject.other	benzene	en
dc.subject.other	ethylbenzene	en
dc.subject.other	ortho xylene	en
dc.subject.other	titanium dioxide	en
dc.subject.other	toluene	en
dc.subject.other	xylene	en
dc.subject.other	adsorption	en
dc.subject.other	benzene	en
dc.subject.other	concentration (composition)	en
dc.subject.other	oxidation	en
dc.subject.other	reaction kinetics	en
dc.subject.other	toluene	en
dc.subject.other	volatile organic compound	en
dc.subject.other	xylene	en
dc.subject.other	adsorption	en
dc.subject.other	article	en
dc.subject.other	catalyst	en
dc.subject.other	chemical structure	en
dc.subject.other	environmental temperature	en
dc.subject.other	gas	en
dc.subject.other	kinetics	en
dc.subject.other	nuclear reactor	en
dc.subject.other	oxidation	en
dc.subject.other	photocatalysis	en
dc.subject.other	priority journal	en
dc.subject.other	solid	en
dc.title	The rate of photocatalytic oxidation of aromatic volatile organic compounds in the gas-phase	en
heal.type	journalArticle	en
heal.identifier.primary	10.1016/j.atmosenv.2008.07.016	en
heal.identifier.secondary	http://dx.doi.org/10.1016/j.atmosenv.2008.07.016	en
heal.language	English	en
heal.publicationDate	2008	en
heal.abstract	In the present study, the gas-solid heterogeneous photocatalytic oxidation (PCO) of six aromatic species of volatile organic compounds (VOCs), benzene, toluene, ethylbenzene, m-, o- and p-xylene over illuminated titania was carried out at ambient temperature in a continuous stirring-tank reactor. Initial VOC concentrations were in the low parts per million (ppm) range. Maximum conversions were over 90% for all compounds except from benzene, ethylbenzene and o-xylene, while the residence time varied from 50 to 210 s. Intermediates were detected only in the case of the xylenes, but catalyst deactivation occurred for all six compounds. The PCO kinetics were well fit by a Langmuir-Hinshelwood (L-H) model for monomolecular surface reaction and it was proved that the reaction rate is related to both constants. The rate constants ranged from 0.147 ppm s(-1) g(cat)(-1) for benzene to 1.067 ppm s(-1) g(cat)(-1) for m-xylene, while the adsorption constants from 0.424 ppm(-1) for ethylbenzene to 0.69 ppm(-1) for toluene. The molecular structure of the compounds was found to play an important role in the reaction. Finally the efficiency of the procedure in the case of a mixture of these aromatic substances was tested. (C) 2008 Elsevier Ltd. All rights reserved.	en
heal.publisher	PERGAMON-ELSEVIER SCIENCE LTD	en
heal.journalName	Atmospheric Environment	en
dc.identifier.doi	10.1016/j.atmosenv.2008.07.016	en
dc.identifier.isi	ISI:000260941000002	en
dc.identifier.volume	42	en
dc.identifier.issue	34	en
dc.identifier.spage	7844	en
dc.identifier.epage	7850	en