Open AccessGas-Phase Photocatalytic Oxidation of Dimethylamine: The Reaction Pathway and Kinetics
Author(s) -
Anna Kachina,
Sergei Preis,
Juha Kallas
Publication year - 2007
Publication title -
international journal of photoenergy
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.426
H-Index - 51
eISSN - 1687-529X
pISSN - 1110-662X
DOI - 10.1155/2007/79847
Subject(s) - dimethylamine , photocatalysis , chemistry , titanium dioxide , carbon dioxide , ammonia , carbon monoxide , kinetics , inorganic chemistry , formamide , catalysis , electrochemical reduction of carbon dioxide , photochemistry , chemical engineering , organic chemistry , physics , quantum mechanics , engineering
Gas-phase photocatalytic oxidation (PCO) and thermal catalytic oxidation (TCO) of dimethylamine (DMA) on titanium dioxide was studied in a continuous flow simple tubular reactor. Volatile PCO products of DMA included ammonia, formamide, carbon dioxide, and water. Ammonia was further oxidized in minor amounts to nitrous oxide and nitrogen dioxide. Effective at 573 K, TCO resulted in the formation of ammonia, hydrogen cyanide, carbon monoxide, carbon dioxide, and water. The PCO kinetic data fit well to the monomolecular Langmuir-Hinshelwood model, whereas TCO kinetic behaviour matched the first-order process. No deactivation of the photocatalyst during the multiple long-run experiments was observed
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