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Photocatalytic carbon dioxide reduction to fuels in continuous flow monolith photoreactor using montmorillonite dispersed Fe/TiO2 nanocatalyst

Photocatalytic conversion of CO2 to fuels has attracted immense attention because it offers a cleaner energy technology and safer environment. In this study, performance of structured montmorillonite (MMT) dispersed Fe-doped titanium dioxide (Fe/TiO2) nanocomposite was tested for dynamic photo-induc...

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主要作者: Tahir, M.
格式: Article
语言:English
出版: Elsevier Ltd. 2018
主题:
TP Chemical technology
在线阅读:http://eprints.utm.my/id/eprint/81914/1/MuhammadTahir2018_PhotocatalyticCarbonDioxideReductiontoFuels.pdf
http://eprints.utm.my/id/eprint/81914/
http://dx.doi.org/10.1016/j.jclepro.2017.09.118
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spelling my.utm.819142019-09-30T12:59:53Z http://eprints.utm.my/id/eprint/81914/ Photocatalytic carbon dioxide reduction to fuels in continuous flow monolith photoreactor using montmorillonite dispersed Fe/TiO2 nanocatalyst Tahir, M. TP Chemical technology Photocatalytic conversion of CO2 to fuels has attracted immense attention because it offers a cleaner energy technology and safer environment. In this study, performance of structured montmorillonite (MMT) dispersed Fe-doped titanium dioxide (Fe/TiO2) nanocomposite was tested for dynamic photo-induced CO2 reduction by H2 to fuels. Cordierite monolithic support was employed in order to improve the photo-activity and reusability of Fe-MMT/TiO2 nanocomposite in a CO2 utilization process. MMT-clay supported Fe/TiO2 samples were prepared by a controlled and direct sol-gel method and were dip-coated over the monolith micro-channels. The efficiency of Fe-loaded MMT/TiO2 for CO2 reduction by H2 toward CO was investigated using a cell type and a monolith photo-reactor under UV-light. The maximum CO yield over 3 wt % Fe-10 wt % MMT-loaded TiO2 catalyst reached 166 µmole g-catal.-1 h-1 at selectivity 99.70%, considerably higher than the amount of CO produced over the MMT/TiO2 (16 µmole g-catal.-1 h-1) and the pure TiO2 (5 µmole g-catal.-1 h-1) catalysts. The other products observed with adequate amounts were CH4 and C2H6. More importantly, photo-activity and stability of Fe-MMT/TiO2 catalyst for CO evolution was significantly improved using monolith photo-reactor compared to the cell type reactor under the same operating conditions. This enactment was evidently due to higher quantum efficiency of monolith photoreactor, improved adsorption-desorption process in a catalyst coated monolith channels and hindered charges recombination by Fe. The reusability of catalyst loaded over the monolithic support showed greater recycling capability than the catalyst dispersed in a cell reactor. This development confirmed higher photo-activity of Fe-MMT/TiO2 photo-catalyst loaded over monolithic support for CO2 photo-reduction to cleaner fuels. Elsevier Ltd. 2018 Article PeerReviewed application/pdf en http://eprints.utm.my/id/eprint/81914/1/MuhammadTahir2018_PhotocatalyticCarbonDioxideReductiontoFuels.pdf Tahir, M. (2018) Photocatalytic carbon dioxide reduction to fuels in continuous flow monolith photoreactor using montmorillonite dispersed Fe/TiO2 nanocatalyst. Journal of Cleaner Production, 170 . pp. 242-250. ISSN 0959-6526 http://dx.doi.org/10.1016/j.jclepro.2017.09.118 DOI:10.1016/j.jclepro.2017.09.118
institution Universiti Teknologi Malaysia
building UTM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Teknologi Malaysia
content_source UTM Institutional Repository
url_provider http://eprints.utm.my/
language English
topic TP Chemical technology
spellingShingle TP Chemical technology
Tahir, M.
Photocatalytic carbon dioxide reduction to fuels in continuous flow monolith photoreactor using montmorillonite dispersed Fe/TiO2 nanocatalyst
description Photocatalytic conversion of CO2 to fuels has attracted immense attention because it offers a cleaner energy technology and safer environment. In this study, performance of structured montmorillonite (MMT) dispersed Fe-doped titanium dioxide (Fe/TiO2) nanocomposite was tested for dynamic photo-induced CO2 reduction by H2 to fuels. Cordierite monolithic support was employed in order to improve the photo-activity and reusability of Fe-MMT/TiO2 nanocomposite in a CO2 utilization process. MMT-clay supported Fe/TiO2 samples were prepared by a controlled and direct sol-gel method and were dip-coated over the monolith micro-channels. The efficiency of Fe-loaded MMT/TiO2 for CO2 reduction by H2 toward CO was investigated using a cell type and a monolith photo-reactor under UV-light. The maximum CO yield over 3 wt % Fe-10 wt % MMT-loaded TiO2 catalyst reached 166 µmole g-catal.-1 h-1 at selectivity 99.70%, considerably higher than the amount of CO produced over the MMT/TiO2 (16 µmole g-catal.-1 h-1) and the pure TiO2 (5 µmole g-catal.-1 h-1) catalysts. The other products observed with adequate amounts were CH4 and C2H6. More importantly, photo-activity and stability of Fe-MMT/TiO2 catalyst for CO evolution was significantly improved using monolith photo-reactor compared to the cell type reactor under the same operating conditions. This enactment was evidently due to higher quantum efficiency of monolith photoreactor, improved adsorption-desorption process in a catalyst coated monolith channels and hindered charges recombination by Fe. The reusability of catalyst loaded over the monolithic support showed greater recycling capability than the catalyst dispersed in a cell reactor. This development confirmed higher photo-activity of Fe-MMT/TiO2 photo-catalyst loaded over monolithic support for CO2 photo-reduction to cleaner fuels.
format Article
author Tahir, M.
author_facet Tahir, M.
author_sort Tahir, M.
title Photocatalytic carbon dioxide reduction to fuels in continuous flow monolith photoreactor using montmorillonite dispersed Fe/TiO2 nanocatalyst
title_short Photocatalytic carbon dioxide reduction to fuels in continuous flow monolith photoreactor using montmorillonite dispersed Fe/TiO2 nanocatalyst
title_full Photocatalytic carbon dioxide reduction to fuels in continuous flow monolith photoreactor using montmorillonite dispersed Fe/TiO2 nanocatalyst
title_fullStr Photocatalytic carbon dioxide reduction to fuels in continuous flow monolith photoreactor using montmorillonite dispersed Fe/TiO2 nanocatalyst
title_full_unstemmed Photocatalytic carbon dioxide reduction to fuels in continuous flow monolith photoreactor using montmorillonite dispersed Fe/TiO2 nanocatalyst
title_sort photocatalytic carbon dioxide reduction to fuels in continuous flow monolith photoreactor using montmorillonite dispersed fe/tio2 nanocatalyst
publisher Elsevier Ltd.
publishDate 2018
url http://eprints.utm.my/id/eprint/81914/1/MuhammadTahir2018_PhotocatalyticCarbonDioxideReductiontoFuels.pdf
http://eprints.utm.my/id/eprint/81914/
http://dx.doi.org/10.1016/j.jclepro.2017.09.118
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score 13.251813

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