caa a22 4500 445389052 CHVBK 20180317143040.0 cr unu---uuuuu 170323e20110401xx s 000 0 eng 10.1007/s11144-011-0281-8 doi (NATIONALLICENCE)springer-10.1007/s11144-011-0281-8 Transferring concepts from classical catalysis to the new field of photocatalysis [Elektronische Daten] [A. Eliyas, K. Kumbilieva, V. Iliev, S. Rakovsky] The aim of the study was to characterize the regime of operation of a newly constructed POLITEF flat-plate gas-phase continuous flow photocatalytic reactor in view of improving its construction and selecting the optimum set of operational conditions. The nanosized photocatalytic powder material (TiO2 Degussa P25, consisting of 75% anatase and 25% rutile with average anatase particle size 25nm) was deposited as a thin film coating on a TLC aluminum sheet, pre-coated with silica gel (Merck, 0.2μm SiO2 film), achieving loadings of 0.6 -2.0mg TiO2/cm2. The reactor is operated either with UV light or visible light, penetrating through a quartz glass flat-plate illumination window (56cm2 illuminated surface area). The time interval needed to reach steady-state operation conditions was established to be 5min, applying the criterion of Wald-Wolfowitz. The model air pollutant was ethylene with a feed concentration of 1000ppm. All the experimental runs were carried out at an optimal relative humidity of 30%, which was established in a previous work. Varying the operational parameters—ethylene contact time, ethylene/oxygen feed ratio, the kind of light and intensity of illumination—the optimum operating conditions were established, under which maximum ethylene conversion was observed. Corrigan's criterion for the presence or absence of diffusion limitations was applied, proving that the reactor was operating in the kinetic region at low TiO2 loadings, but at high loadings, a diffusion retardation effect was observed. It was established that the flow through the reactor is laminar based on the values of the Reynolds number. Akadémiai Kiadó, Budapest, Hungary, 2011 Nanosized photocatalyst nationallicence Photocatalytic reactor nationallicence Conditions of operation nationallicence Eliyas A. Institute of Catalysis, Bulgarian Academy of Sciences, "Acad. G. Bonchev” Str., bl. 11, 1113, Sofia, Bulgaria aut Kumbilieva K. Institute of Catalysis, Bulgarian Academy of Sciences, "Acad. G. Bonchev” Str., bl. 11, 1113, Sofia, Bulgaria aut Iliev V. Institute of Catalysis, Bulgarian Academy of Sciences, "Acad. G. Bonchev” Str., bl. 11, 1113, Sofia, Bulgaria aut Rakovsky S. Institute of Catalysis, Bulgarian Academy of Sciences, "Acad. G. Bonchev” Str., bl. 11, 1113, Sofia, Bulgaria aut Reaction Kinetics, Mechanisms and Catalysis Springer Netherlands 102/2(2011-04-01), 251-261 1878-5190 102:2<251 2011 102 11144 https://doi.org/10.1007/s11144-011-0281-8 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11144-011-0281-8 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Eliyas A. Institute of Catalysis, Bulgarian Academy of Sciences, "Acad. G. Bonchev” Str., bl. 11, 1113, Sofia, Bulgaria aut NATIONALLICENCE 700 1- Kumbilieva K. Institute of Catalysis, Bulgarian Academy of Sciences, "Acad. G. Bonchev” Str., bl. 11, 1113, Sofia, Bulgaria aut NATIONALLICENCE 700 1- Iliev V. Institute of Catalysis, Bulgarian Academy of Sciences, "Acad. G. Bonchev” Str., bl. 11, 1113, Sofia, Bulgaria aut NATIONALLICENCE 700 1- Rakovsky S. Institute of Catalysis, Bulgarian Academy of Sciences, "Acad. G. Bonchev” Str., bl. 11, 1113, Sofia, Bulgaria aut NATIONALLICENCE 773 0- Reaction Kinetics, Mechanisms and Catalysis Springer Netherlands 102/2(2011-04-01), 251-261 1878-5190 102:2<251 2011 102 11144 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer