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Reaction Condition Effects on the Photocatalytic Production of H 2 from Ethanol in the Gas Phase over Pt/TiO 2
Author(s) -
Molins Francesc,
Küpper Karsten,
Schweers Elke
Publication year - 2021
Publication title -
chemphotochem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.13
H-Index - 18
ISSN - 2367-0932
DOI - 10.1002/cptc.202000216
Subject(s) - photocatalysis , ethanol , mass fraction , gas phase , fraction (chemistry) , irradiation , phase (matter) , molar ratio , mole fraction , molar mass , molar concentration , molar , chemistry , materials science , analytical chemistry (journal) , catalysis , photochemistry , organic chemistry , physics , geology , nuclear physics , paleontology , polymer
The effects of reaction parameters on H2 production from ethanol photocatalysis in the gas phase have been investigated. The photocatalytic activity evolves from an early mass‐transfer limited regime to an independent one at later irradiation times, which is interpreted in terms of a photocatalytic site activity distribution. Ethanol molar fraction exhibits two different domains, with H2 production increasing up to a molar fraction of 0.12, beyond which it plateaus. H2 :AcH ratios are very sensitive to reaction conditions, reaching 1.8 at low reactant flows. UV light is converted to H2 with an efficiency of nearly 3 %.