Gas-Phase Photocatalytic Oxidation of Dimethylamine: The Reaction Pathway and Kinetics

Kachina, Anna; Preis, Sergei; Kallas, Juha

doi:https://doi.org/10.1155/2007/79847

International Journal of Photoenergy

On this page

Abstract References Copyright Related Articles

Research Article | Open Access

Volume 2007 | Article ID 079847 | https://doi.org/10.1155/2007/79847

Gas-Phase Photocatalytic Oxidation of Dimethylamine: The Reaction Pathway and Kinetics

Anna Kachina,¹Sergei Preis,¹and Juha Kallas¹

Academic Editor: Jimmy C. Yu

Received29 Aug 2007

Accepted29 Oct 2007

Published23 Dec 2007

Abstract

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.

References

R. J. Lewis Sr., Ed., Hawley's Condensed Chemical Dictionary, John Wiley & Sons, New York, NY, USA, 13th edition, 1997.
M. V. Kantak, K. S. De Manrique, R. H. Aglave, and R. P. Hesketh, “Methylamine oxidation in a flow reactor: mechanism and modeling,” Combustion and Flame, vol. 108, no. 3, pp. 235–265, 1997.
View at: Publisher Site | Google Scholar
A. Kachina, S. Preis, G. C. Lluellas, and J. Kallas, “Gas-phase and aqueous photocatalytic oxidation of methylamine: the reaction pathways,” International Journal of Photoenergy, vol. 2007, Article ID 32524, p. 6, 2007.
View at: Publisher Site | Google Scholar
C. P. A. Mulcahy, A. J. Carman, and S. M. Casey, “The adsorption and thermal decomposition of dimethylamine on Si(100),” Surface Science, vol. 459, no. 1-2, pp. 1–13, 2000.
View at: Publisher Site | Google Scholar
J. Pérez-Ramírez, E. V. Kondratenko, V. A. Kondratenko, and M. Baerns, “Selectivity-directing factors of ammonia oxidation over PGM gauzes in the temporal analysis of products reactor: secondary interactions of ${NH}_{3}$ and NO,” Journal of Catalysis, vol. 229, no. 2, pp. 303–313, 2005.
View at: Publisher Site | Google Scholar
S. B. Kim and S. C. Hong, “Kinetic study for photocatalytic degradation of volatile organic compounds in air using thin film ${TiO}_{2}$ photocatalyst,” Applied Catalysis B: Environmental, vol. 35, no. 4, pp. 305–315, 2002.
View at: Publisher Site | Google Scholar
P. Kolinko, D. Kozlov, A. Vorontsov, and S. V. Preis, “Photocatalytic oxidation of 1,1-dimethyl hydrazine vapours on ${TiO}_{2}$ : FTIR in situ studies,” Catalysis Today, vol. 122, no. 1-2, pp. 178–185, 2007.
View at: Publisher Site | Google Scholar

Copyright

Copyright © 2007 Anna Kachina et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

PDF Download Citation Order printed copies

Views

561

Downloads

1280

Citations