Ethanol Dry Reforming for Syngas Production Over Ce-promoted Ni/Al2O3 Catalyst

Ce-promoted and unpromoted 10%Ni/Al2O3 catalysts were prepared by co-impregnation method and evaluated for ethanol dry reforming in a quartz fixed-bed reactor at different CO2:C2H5OH ratios of 2.5:1 to 1:2.5 and temperature of 923–973 K under atmospheric pressure. Thermogravimetric studies indicated...

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Main Authors:	Mahadi, Bahari, Phuc, Nguyen Huu Huy, Bawadi, Abdullah, Alenazey, Feraih, Vo, Dai-Viet N.
Format:	Article
Language:	English
Published:	Elsevier Ltd 2016
Subjects:	TP Chemical technology
Online Access:	http://umpir.ump.edu.my/id/eprint/11875/ http://umpir.ump.edu.my/id/eprint/11875/ http://umpir.ump.edu.my/id/eprint/11875/ http://umpir.ump.edu.my/id/eprint/11875/1/Ethanol%20Dry%20Reforming%20for%20Syngas%20Production%20over%20Ce-promoted%20Ni-Al2O3%20Catalyst.pdf

id	ump-11875
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spelling	ump-118752019-10-18T02:59:15Z http://umpir.ump.edu.my/id/eprint/11875/ Ethanol Dry Reforming for Syngas Production Over Ce-promoted Ni/Al2O3 Catalyst Mahadi, Bahari Phuc, Nguyen Huu Huy Bawadi, Abdullah Alenazey, Feraih Vo, Dai-Viet N. TP Chemical technology Ce-promoted and unpromoted 10%Ni/Al2O3 catalysts were prepared by co-impregnation method and evaluated for ethanol dry reforming in a quartz fixed-bed reactor at different CO2:C2H5OH ratios of 2.5:1 to 1:2.5 and temperature of 923–973 K under atmospheric pressure. Thermogravimetric studies indicated that both catalysts were completely calcined and subsequently reduced to metallic Ni° phase. The addition of Ce promoter facilitated the reduction process and decreased reduction temperature by about 315 K. Stronger metal-support interaction was observed with Ce addition. NiO and NiAl2O4 phases were formed on catalyst surface during calcination for both catalysts whilst CeO2 form was identified on promoted catalyst. Significant enhancement of ethanol conversion up to 75.2% with reaction temperature was observed and catalytic activity appeared to be stable with time-on-stream at beyond 5–7 h for both promoted and unpromoted catalysts. C2H5OH and CO2 conversions increased with growing CO2 partial pressure whilst the optimal C2H5OH partial pressure was obtained at about 30–40 kPa for both catalysts. C2H5OH conversion was always greater than that of CO2 indicating the co-existence of side reactions, namely; ethanol decomposition and dehydrogenation during ethanol dry reforming reaction. Ce-addition improved both C2H5OH and CO2 conversions irrespective of reactant partial pressure. Although both carbon nanofilament and graphitic carbon were detected on the surface of spent catalysts by SEM, TEM and Raman measurements, the proportion of carbon nanofilament was dominant and the percentage of amorphous carbon was increased with Ce promoter. Elsevier Ltd 2016 Article PeerReviewed application/pdf en http://umpir.ump.edu.my/id/eprint/11875/1/Ethanol%20Dry%20Reforming%20for%20Syngas%20Production%20over%20Ce-promoted%20Ni-Al2O3%20Catalyst.pdf Mahadi, Bahari and Phuc, Nguyen Huu Huy and Bawadi, Abdullah and Alenazey, Feraih and Vo, Dai-Viet N. (2016) Ethanol Dry Reforming for Syngas Production Over Ce-promoted Ni/Al2O3 Catalyst. Journal of Environmental Chemical Engineering. ISSN 2213-3437 (In Press) http://dx.doi.org/10.1016/j.jece.2016.01.038 DOI: 10.1016/j.jece.2016.01.038
repository_type	Digital Repository
institution_category	Local University
institution	Universiti Malaysia Pahang
building	UMP Institutional Repository
collection	Online Access
language	English
topic	TP Chemical technology
spellingShingle	TP Chemical technology Mahadi, Bahari Phuc, Nguyen Huu Huy Bawadi, Abdullah Alenazey, Feraih Vo, Dai-Viet N. Ethanol Dry Reforming for Syngas Production Over Ce-promoted Ni/Al2O3 Catalyst
description	Ce-promoted and unpromoted 10%Ni/Al2O3 catalysts were prepared by co-impregnation method and evaluated for ethanol dry reforming in a quartz fixed-bed reactor at different CO2:C2H5OH ratios of 2.5:1 to 1:2.5 and temperature of 923–973 K under atmospheric pressure. Thermogravimetric studies indicated that both catalysts were completely calcined and subsequently reduced to metallic Ni° phase. The addition of Ce promoter facilitated the reduction process and decreased reduction temperature by about 315 K. Stronger metal-support interaction was observed with Ce addition. NiO and NiAl2O4 phases were formed on catalyst surface during calcination for both catalysts whilst CeO2 form was identified on promoted catalyst. Significant enhancement of ethanol conversion up to 75.2% with reaction temperature was observed and catalytic activity appeared to be stable with time-on-stream at beyond 5–7 h for both promoted and unpromoted catalysts. C2H5OH and CO2 conversions increased with growing CO2 partial pressure whilst the optimal C2H5OH partial pressure was obtained at about 30–40 kPa for both catalysts. C2H5OH conversion was always greater than that of CO2 indicating the co-existence of side reactions, namely; ethanol decomposition and dehydrogenation during ethanol dry reforming reaction. Ce-addition improved both C2H5OH and CO2 conversions irrespective of reactant partial pressure. Although both carbon nanofilament and graphitic carbon were detected on the surface of spent catalysts by SEM, TEM and Raman measurements, the proportion of carbon nanofilament was dominant and the percentage of amorphous carbon was increased with Ce promoter.
format	Article
author	Mahadi, Bahari Phuc, Nguyen Huu Huy Bawadi, Abdullah Alenazey, Feraih Vo, Dai-Viet N.
author_facet	Mahadi, Bahari Phuc, Nguyen Huu Huy Bawadi, Abdullah Alenazey, Feraih Vo, Dai-Viet N.
author_sort	Mahadi, Bahari
title	Ethanol Dry Reforming for Syngas Production Over Ce-promoted Ni/Al2O3 Catalyst
title_short	Ethanol Dry Reforming for Syngas Production Over Ce-promoted Ni/Al2O3 Catalyst
title_full	Ethanol Dry Reforming for Syngas Production Over Ce-promoted Ni/Al2O3 Catalyst
title_fullStr	Ethanol Dry Reforming for Syngas Production Over Ce-promoted Ni/Al2O3 Catalyst
title_full_unstemmed	Ethanol Dry Reforming for Syngas Production Over Ce-promoted Ni/Al2O3 Catalyst
title_sort	ethanol dry reforming for syngas production over ce-promoted ni/al2o3 catalyst
publisher	Elsevier Ltd
publishDate	2016
url	http://umpir.ump.edu.my/id/eprint/11875/ http://umpir.ump.edu.my/id/eprint/11875/ http://umpir.ump.edu.my/id/eprint/11875/ http://umpir.ump.edu.my/id/eprint/11875/1/Ethanol%20Dry%20Reforming%20for%20Syngas%20Production%20over%20Ce-promoted%20Ni-Al2O3%20Catalyst.pdf
first_indexed	2023-09-18T22:12:54Z
last_indexed	2023-09-18T22:12:54Z
_version_	1777415146361061376

Ethanol Dry Reforming for Syngas Production Over Ce-promoted Ni/Al2O3 Catalyst

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