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Performance comparison of CO2 conversion in slurry and monolith photoreactors using Pd and Rh-TiO2 catalyst under ultraviolet irradiation

Paper ID Volume ID Publish Year Pages File Format Full-Text
46541 46441 2012 8 PDF Available
Title
Performance comparison of CO2 conversion in slurry and monolith photoreactors using Pd and Rh-TiO2 catalyst under ultraviolet irradiation
Abstract

Anthropogenic activities are causing an increase in greenhouse gases in the atmosphere, with carbon dioxide (CO2) being the key cause of global warming. The conversion of CO2 into valuable hydrocarbons serves as a promising route for mitigating the effects of global warming and meeting future energy demands. Herein, we show the comparison between the photocatalytic reduction of CO2 for metal coated TiO2 nanoparticles in a slurry batch annular reactor system and metal coated TiO2 monoliths in an internally illuminated photoreactor system using the 1 wt% Pd/0.01 wt% Rh-TiO2 catalyst. Carbon based fuels, such as methane, methanol or acetaldehyde were produced in the gas phase from the CO2 reduction with water by titania nanoparticles modified by Pd and Rh for improved reactivity. The modified photocatalysts synthesized by the improved sol–gel method were tested under UV light irradiation. The quantum efficiency of the internally illuminated monolith reactor was near one order of magnitude higher than the slurry batch annular reactor. This efficiency was due to the reactor's flexible configuration; which allows maximum exploitation of the combined advantages of the high surface area of the monolith and the elimination of uneven light distribution via the optical fibres.

Graphical abstract. Figure optionsDownload full-size imageDownload as PowerPoint slideHighlights▸ Novel combination of metal coated TiO2 nanoparticles and monoliths were prepared. ▸ The photocatalytic properties were studied upon UV irradiation. ▸ The metal coated TiO2 monoliths show superior photocatalytic activity. ▸ We report improved quantum efficiency due to the reactor's flexible configuration.

Keywords
Slurry reactor; Photocatalysis; Monolith photoreactor; Titanium dioxide
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Performance comparison of CO2 conversion in slurry and monolith photoreactors using Pd and Rh-TiO2 catalyst under ultraviolet irradiation
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis B: Environmental - Volume 126, 25 September 2012, Pages 172–179
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us