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International Journal of Photoenergy
Volume 2011, Article ID 305650, 14 pages
http://dx.doi.org/10.1155/2011/305650
Research Article

Effect of Preparation Condition of Ti O 𝟐 Film and Experimental Condition on C O 𝟐 Reduction Performance of Ti O 𝟐 Photocatalyst Membrane Reactor

1Division of Mechanical Engineering, Graduate School of Engineering, Mie University, 1577 Kurimamachiya-cho, Tsu 514-8507, Japan
2School of Mechanical Engineering, The University of Adelaide, Adelaide, SA 5005, Australia

Received 3 May 2011; Revised 29 June 2011; Accepted 19 July 2011

Academic Editor: Nicolas Alonso-Vante

Copyright © 2011 Akira Nishimura 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.

Abstract

It was previously reported that CO2 could be reduced into CO, CH4, and so forth, which can be used as fuels, by TiO2 as the photocatalyst under UV radiation. To increase the concentration of fuel and improve CO2 reduction performance on TiO2 photocatalyst, a membrane reactor composed of TiO2 and gas separation membrane prepared by sol-gel and dip-coating method has been built. Factors such as rising speed (RS) in the dip-coating process and the timing and amount of water injected in the membrane reactor in CO2 reduction experiment have been investigated. As a result, the largest amount of TiO2 film is obtained for R S = 0 . 6 6  mm/s among various RS conditions investigated in this study. According to CO2 reduction experiment by gas circulation type reactor, too much water which cannot be consumed in CO2 reduction process would not help improving the CO2 reduction performance.