Impact of Black Body Material Enhanced Gas Movement on CO2 Photocatalytic Reduction Performance

Catalysts

Akira Nishimura¹  Homare Mae¹  Takaharu Kato¹  Eric Hu² 

[1] Division of Mechanical Engineering, Graduate School of Engineering, Mie University, 1577 Kurimamachiya-cho, Mie 514-8507, Japan;School of Mechanical Engineering, The University of Adelaide, Adelaide 5005, Australia;

关键词: TiO₂ photocatalyst;    CO₂ reduction;    black body material;    infrared ray;    mass transfer promotion;   

DOI  :  10.3390/catal12050470

来源: DOAJ

【 摘 要 】

Gas movement around and/or through the photocatalyst is thought to be an inhibition factor to promote photocatalytic CO₂ reduction performance. In this study, a hypothesis is put forward that the natural thermosiphon movement of gases around the photocatalyst can be improved by using black body material/surface. The black body material/surface that is placed underneath the photocatalyst in the reactor would be heated by absorbing light and then this heats up the gases to promote their movement around/through the photocatalyst. The aim of this study is to prove or disprove this hypothesis by conducting CO₂ reduction performance of a TiO₂ photocatalyst with NH₃ under the conditions without black body material (W/O B.B.), with one black body material (W B.B.-1), and with three black body materials (W B.B.-3). The impact of molar ratio of CO₂/NH₃ on CO₂ reduction performance is also investigated. This study revealed/proved that the hypothesis worked and that the CO₂ reduction performance is promoted more with W B.B.-3 compared to that with W B.B.-1. The maximum concentration of formed CO with W B.B.-3 is two to five times as large as that under the condition W/O B.B.

【 授权许可】

Unknown