Photocatalytic degradation of methyl tert-butyl ether in the gas-phase: A kinetic study

Boulamanti, AK; Philippopoulos, CJ

dc.contributor.author	Boulamanti, AK	en
dc.contributor.author	Philippopoulos, CJ	en
dc.date.accessioned	2014-03-01T01:29:00Z
dc.date.available	2014-03-01T01:29:00Z
dc.date.issued	2008	en
dc.identifier.issn	0304-3894	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/19072
dc.subject	Acetone	en
dc.subject	Langmuir-Hinshelwood kinetics	en
dc.subject	tert-Butyl formate	en
dc.subject	Titanium dioxide	en
dc.subject.classification	Engineering, Environmental	en
dc.subject.classification	Engineering, Civil	en
dc.subject.classification	Environmental Sciences	en
dc.subject.other	Acetone	en
dc.subject.other	Adsorption	en
dc.subject.other	Atmospheric humidity	en
dc.subject.other	Automotive fuels	en
dc.subject.other	Concentration (process)	en
dc.subject.other	Ethers	en
dc.subject.other	Fuel additives	en
dc.subject.other	Kinetic theory	en
dc.subject.other	Meteorology	en
dc.subject.other	Moisture	en
dc.subject.other	Organic compounds	en
dc.subject.other	Oxides	en
dc.subject.other	Oxygen	en
dc.subject.other	Photocatalysis	en
dc.subject.other	Photodegradation	en
dc.subject.other	Reaction kinetics	en
dc.subject.other	Titanium	en
dc.subject.other	Titanium dioxide	en
dc.subject.other	Volatile organic compounds	en
dc.subject.other	Adsorption constants	en
dc.subject.other	Ambient temperatures	en
dc.subject.other	Butyl ethers	en
dc.subject.other	Butyl formates	en
dc.subject.other	Final products	en
dc.subject.other	Initial concentrations	en
dc.subject.other	Kinetic studies	en
dc.subject.other	Kinetics equations	en
dc.subject.other	Langmuir	en
dc.subject.other	Langmuir-Hinshelwood kinetics	en
dc.subject.other	Optimum values	en
dc.subject.other	Oxygen concentrations	en
dc.subject.other	Photocatalytic degradations	en
dc.subject.other	Photocatalytic oxidations	en
dc.subject.other	Photochemical oxidants	en
dc.subject.other	Plug flow reactors	en
dc.subject.other	Positive effects	en
dc.subject.other	Reaction schemes	en
dc.subject.other	Relative humidities	en
dc.subject.other	tert-Butyl formate	en
dc.subject.other	Rate constants	en
dc.subject.other	acetone	en
dc.subject.other	carbon dioxide	en
dc.subject.other	tert butyl methyl ether	en
dc.subject.other	titanium dioxide	en
dc.subject.other	catalysis	en
dc.subject.other	concentration (composition)	en
dc.subject.other	kinetics	en
dc.subject.other	MTBE	en
dc.subject.other	photodegradation	en
dc.subject.other	photooxidation	en
dc.subject.other	titanium	en
dc.subject.other	volatile organic compound	en
dc.subject.other	article	en
dc.subject.other	degradation	en
dc.subject.other	environmental temperature	en
dc.subject.other	gas analysis	en
dc.subject.other	oxygen concentration	en
dc.subject.other	photocatalysis	en
dc.subject.other	photochemical smog	en
dc.subject.other	toxicokinetics	en
dc.subject.other	water vapor	en
dc.subject.other	Air Pollutants, Occupational	en
dc.subject.other	Catalysis	en
dc.subject.other	Humidity	en
dc.subject.other	Kinetics	en
dc.subject.other	Methyl Ethers	en
dc.subject.other	Oxidation-Reduction	en
dc.subject.other	Oxygen	en
dc.subject.other	Photochemistry	en
dc.subject.other	Water	en
dc.title	Photocatalytic degradation of methyl tert-butyl ether in the gas-phase: A kinetic study	en
heal.type	journalArticle	en
heal.identifier.primary	10.1016/j.jhazmat.2008.02.087	en
heal.identifier.secondary	http://dx.doi.org/10.1016/j.jhazmat.2008.02.087	en
heal.language	English	en
heal.publicationDate	2008	en
heal.abstract	Methyl tert-butyl ether (MTBE) is the basic oxygenated motor fuel additive in Europe and is included in volatile organic compounds (VOCs), which can produce photochemical oxidants. In the present study the gas-phase photocatalytic oxidation (PCO) of MTBE over illuminated titanium dioxide was carried out at ambient temperature in a plug flow reactor. The intermediates detected are mainly tert-butyl formate and acetone, while the final products are CO2 and water. The system was sensitive to the oxygen concentration, for concentrations up to 15% (v/v). Moisture had a positive effect on the reaction, obtaining an optimum value near 45% relative humidity for 200 ppmv MTBE initial concentration. A reaction scheme has been proposed for the interpretation of the experimental results and a kinetic study was conducted, using the Langmuir-Hinshelwood kinetics equation. The MTBE rate constant was 1.545 x 10(-6) M s(-1) g(cat)(-1) for the reaction without moisture and 2.46 x 10(-6) M s(-1) g(cat)(-1) for the reaction in the presence of moisture and the adsorption constant was 2.187 x 10(5) M-1 independent of humidity. (c) 2008 Elsevier B.V. All rights reserved.	en
heal.publisher	ELSEVIER SCIENCE BV	en
heal.journalName	Journal of Hazardous Materials	en
dc.identifier.doi	10.1016/j.jhazmat.2008.02.087	en
dc.identifier.isi	ISI:000261255100013	en
dc.identifier.volume	160	en
dc.identifier.issue	1	en
dc.identifier.spage	83	en
dc.identifier.epage	87	en