Coupling of Adsorption on Zeolite and V-UV Irradiation for the Treatment of VOC Containing Air Streams: Effect of TiO2 on the VOC Degradation Efficiency

Abstract

We have investigated the efficiency of the coupling of adsorption on a zeolite material (DAY) and UV or V-UV irradiation for the treatment of VOC containing air streams. We have compared the efficiency of photodegradation of two pollutants (1-butanol and toluene) in the absence and in the presence of TiO2 deposited on DAY (DAY/TiO

Degradation of 2,4-dihydroxibenzoic acid by vacuum UV process in aqueous solution: Kinetic, identification of intermediates and reaction pathway

“…Absorption of water increases steadily from approximately 190 to 120 nm and its electronic excitation in this spectral region induces its homolysis leading to the production of a large amount of hydrogen radicals (H • ) and HO • [7]. For this purpose, vacuum ultra-violet (V-UV) lamps have been used for water homolysis in water treatment [8][9][10][11][12] and gaseous stream treatment [13][14][15][16]. This kind of lamp is a very interesting and powerful source of HO • radicals [7,17] with a considerable potential for application.…”

Electric and spectroscopic analysis of a pure nitrogen mono-filamentary dielectric barrier discharge (MF-DBD) at 760 Torr

“…Some of these applications concern photo-chemical treatment of water [Azrague K et al 2005, Gonzalez et al 2004, volatile organic compound (VOC) remediation [Biomorgi J et al 2005, Koutsospyros A et al 2004, biochemical decontamination and remediation of toxic gases [Herrman H W et al 1999], realisation of non-coherent vacuum ultraviolet (VUV: 100 nm < λ < 200 nm) or ultraviolet (UV: 200 nm < λ < 400 nm) sources [Kurunczi P et al 1999, Masoud N et al 2004, material deposition [Babayan S E et al 1998], H 2 generation for fuel cells and diesel reforming [Qiu H et al 2004, exhaust treatment [Dietz et al 2004] … As far as non-coherent radiation DBD sources are concerned, VUV sources are of topical interest for a variety of industrial purposes such as plasma processing [Kogelschatz U et al 1999], surface cleaning [Korfatis G et al 2002] and modification [Wagner H-E et al 2003, Borcia G et al 2003, sterilization, decontamination and medical care. Recently some emerging scientific investigations were performed in neon [Carman R J et al 2010].…”

A New Method for the Measurement of the Diffusion Coefficient of Adsorbed Vapors in Thin Zeolite Films, Based on Magnetoelastic Sensors

“…Concerning the detection, a number of different detection techniques have been proposed in the past [6,[8][9][10][11][12][13][14]. As for filtration, zeolites have played an active role towards this direction, due to their microporous structure, which allows for the trapping and the subsequent removal of VOC from certain atmospheres or other contaminated substances [15][16][17][18]. There are cases though, where removal of VOC by catalytic conversion has been successfully performed [19][20][21].…”