Hydrogen production from CH4 dry reforming over bimetallic Ni–Co/Al2O3 catalyst

Bimetallic 5%Ni–10%Co/Al2O3 catalyst was synthesized using impregnation method and evaluated for methane dry reforming reaction at different reaction temperatures. NiO, Co3O4 and spinal metal aluminates, namely, CoAl2O4 and NiAl2O4 phases were formed on γ-Al2O3 support surface during calcination pro...

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Main Authors: Siang, Tan Ji, Singh, Sharanjit, Omoregbe, Osaze, Bach, Long Giang, Phuc, Nguyen Huu Huy, Vo, Dai-Viet N.
Format: Article
Language:English
English
Published: Elsevier Ltd. 2018
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Online Access:http://umpir.ump.edu.my/id/eprint/22359/1/Hydrogen%20production%20from%20CH4%20dry%20reforming%20over%20bimetallic%20Ni%E2%80%93Co-Al2%20O3%20catalyst.pdf
http://umpir.ump.edu.my/id/eprint/22359/7/Hydrogen%20production%20from%20CH4%20dry%20reforming%20over%20bimetallic%20Ni%E2%80%93CoAl2O3%20catalyst.pdf
http://umpir.ump.edu.my/id/eprint/22359/
https://doi.org/10.1016/j.joei.2017.06.001
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spelling my.ump.umpir.223592019-10-03T07:42:42Z http://umpir.ump.edu.my/id/eprint/22359/ Hydrogen production from CH4 dry reforming over bimetallic Ni–Co/Al2O3 catalyst Siang, Tan Ji Singh, Sharanjit Omoregbe, Osaze Bach, Long Giang Phuc, Nguyen Huu Huy Vo, Dai-Viet N. TP Chemical technology Bimetallic 5%Ni–10%Co/Al2O3 catalyst was synthesized using impregnation method and evaluated for methane dry reforming reaction at different reaction temperatures. NiO, Co3O4 and spinal metal aluminates, namely, CoAl2O4 and NiAl2O4 phases were formed on γ-Al2O3 support surface during calcination process. 5%Ni–10%Co/Al2O3 catalyst exhibited reasonable surface area of 86.93 m2 g−1 with small crystallite dimension of less than 10 nm suggesting that both Co3O4 and NiO phases were finely dispersed on the surface of support in agreement with results from scanning electron microscopy (SEM) measurement. Temperature-programmed calcination measurement indicates the complete thermal decomposition and oxidation of metal precursors, viz. Ni(NO3)2 and Co(NO3)2 to metal oxides and metal aluminates at below 700 K. Both CH4 and CO2 conversions were stable over a period of 4 h on-stream and attained an optimum at about 67% and 71%, respectively at 973 K whilst H2 selectivity and yield were higher than 49%. The ratio of H2/CO was always less than unity for all runs indicating the presence of reverse water–gas shift reaction. The activation energy for CH4 and CO2 consumption was computed as 55.60 and 40.25 kJ mol−1, correspondingly. SEM micrograph of spent catalyst detected the formation of whisker-like carbon on catalyst surface whilst D and G bands characteristic for the appearance of amorphous and graphitic carbons in this order were observed on surface of used catalyst by Raman spectroscopy analysis. Additionally, the percentage of filamentous carbon was greater than that of graphitic carbon. Elsevier Ltd. 2018 Article PeerReviewed pdf en http://umpir.ump.edu.my/id/eprint/22359/1/Hydrogen%20production%20from%20CH4%20dry%20reforming%20over%20bimetallic%20Ni%E2%80%93Co-Al2%20O3%20catalyst.pdf pdf en http://umpir.ump.edu.my/id/eprint/22359/7/Hydrogen%20production%20from%20CH4%20dry%20reforming%20over%20bimetallic%20Ni%E2%80%93CoAl2O3%20catalyst.pdf Siang, Tan Ji and Singh, Sharanjit and Omoregbe, Osaze and Bach, Long Giang and Phuc, Nguyen Huu Huy and Vo, Dai-Viet N. (2018) Hydrogen production from CH4 dry reforming over bimetallic Ni–Co/Al2O3 catalyst. Journal of the Energy Institute, 91 (5). pp. 683-694. ISSN 1743-9671 https://doi.org/10.1016/j.joei.2017.06.001 10.1016/j.joei.2017.06.001
institution Universiti Malaysia Pahang
building UMP Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Malaysia Pahang
content_source UMP Institutional Repository
url_provider http://umpir.ump.edu.my/
language English
English
topic TP Chemical technology
spellingShingle TP Chemical technology
Siang, Tan Ji
Singh, Sharanjit
Omoregbe, Osaze
Bach, Long Giang
Phuc, Nguyen Huu Huy
Vo, Dai-Viet N.
Hydrogen production from CH4 dry reforming over bimetallic Ni–Co/Al2O3 catalyst
description Bimetallic 5%Ni–10%Co/Al2O3 catalyst was synthesized using impregnation method and evaluated for methane dry reforming reaction at different reaction temperatures. NiO, Co3O4 and spinal metal aluminates, namely, CoAl2O4 and NiAl2O4 phases were formed on γ-Al2O3 support surface during calcination process. 5%Ni–10%Co/Al2O3 catalyst exhibited reasonable surface area of 86.93 m2 g−1 with small crystallite dimension of less than 10 nm suggesting that both Co3O4 and NiO phases were finely dispersed on the surface of support in agreement with results from scanning electron microscopy (SEM) measurement. Temperature-programmed calcination measurement indicates the complete thermal decomposition and oxidation of metal precursors, viz. Ni(NO3)2 and Co(NO3)2 to metal oxides and metal aluminates at below 700 K. Both CH4 and CO2 conversions were stable over a period of 4 h on-stream and attained an optimum at about 67% and 71%, respectively at 973 K whilst H2 selectivity and yield were higher than 49%. The ratio of H2/CO was always less than unity for all runs indicating the presence of reverse water–gas shift reaction. The activation energy for CH4 and CO2 consumption was computed as 55.60 and 40.25 kJ mol−1, correspondingly. SEM micrograph of spent catalyst detected the formation of whisker-like carbon on catalyst surface whilst D and G bands characteristic for the appearance of amorphous and graphitic carbons in this order were observed on surface of used catalyst by Raman spectroscopy analysis. Additionally, the percentage of filamentous carbon was greater than that of graphitic carbon.
format Article
author Siang, Tan Ji
Singh, Sharanjit
Omoregbe, Osaze
Bach, Long Giang
Phuc, Nguyen Huu Huy
Vo, Dai-Viet N.
author_facet Siang, Tan Ji
Singh, Sharanjit
Omoregbe, Osaze
Bach, Long Giang
Phuc, Nguyen Huu Huy
Vo, Dai-Viet N.
author_sort Siang, Tan Ji
title Hydrogen production from CH4 dry reforming over bimetallic Ni–Co/Al2O3 catalyst
title_short Hydrogen production from CH4 dry reforming over bimetallic Ni–Co/Al2O3 catalyst
title_full Hydrogen production from CH4 dry reforming over bimetallic Ni–Co/Al2O3 catalyst
title_fullStr Hydrogen production from CH4 dry reforming over bimetallic Ni–Co/Al2O3 catalyst
title_full_unstemmed Hydrogen production from CH4 dry reforming over bimetallic Ni–Co/Al2O3 catalyst
title_sort hydrogen production from ch4 dry reforming over bimetallic ni–co/al2o3 catalyst
publisher Elsevier Ltd.
publishDate 2018
url http://umpir.ump.edu.my/id/eprint/22359/1/Hydrogen%20production%20from%20CH4%20dry%20reforming%20over%20bimetallic%20Ni%E2%80%93Co-Al2%20O3%20catalyst.pdf
http://umpir.ump.edu.my/id/eprint/22359/7/Hydrogen%20production%20from%20CH4%20dry%20reforming%20over%20bimetallic%20Ni%E2%80%93CoAl2O3%20catalyst.pdf
http://umpir.ump.edu.my/id/eprint/22359/
https://doi.org/10.1016/j.joei.2017.06.001
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