Stability evaluation of ethanol dry reforming on Lanthania‐doped cobalt‐based catalysts for hydrogen‐rich syngas generation

Catalytic stability with time‐on‐stream is an important aspect in ethanol dry reforming (EDR) since catalysts could encounter undesirable deterioration arising from deposited carbon. This work examined the promotional effect of La on 10%Co/Al2O3 in terms of activity, stability, and characteristics....

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Main Authors: Fahim, Fayaz, Long, Giang Bach, Mahadi, Bahari, Trinh, Duy Nguyen, Khanh, B. Vu, Ramesh, Kanthasamy, Chanatip, Samart, Chinh, Nguyen‐Huy, Dai‐Viet, N. Vo
Format: Article
Language:English
Published: Wiley Online Library 2019
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Online Access:http://umpir.ump.edu.my/id/eprint/24762/
http://umpir.ump.edu.my/id/eprint/24762/
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http://umpir.ump.edu.my/id/eprint/24762/1/Stability%20evaluation%20of%20ethanol%20dry%20reforming%20on%20Lanthania%E2%80%90doped.pdf
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spelling ump-247622019-07-17T02:03:39Z http://umpir.ump.edu.my/id/eprint/24762/ Stability evaluation of ethanol dry reforming on Lanthania‐doped cobalt‐based catalysts for hydrogen‐rich syngas generation Fahim, Fayaz Long, Giang Bach Mahadi, Bahari Trinh, Duy Nguyen Khanh, B. Vu Ramesh, Kanthasamy Chanatip, Samart Chinh, Nguyen‐Huy Dai‐Viet, N. Vo TP Chemical technology Catalytic stability with time‐on‐stream is an important aspect in ethanol dry reforming (EDR) since catalysts could encounter undesirable deterioration arising from deposited carbon. This work examined the promotional effect of La on 10%Co/Al2O3 in terms of activity, stability, and characteristics. Catalysts were characterized by X‐ray diffraction (XRD), transmission electron microscopy (TEM), scanning electron microscopy (SEM), Raman, and X‐ray photoelectron spectroscopy (XPS) measurements whilst catalytic EDR performance of La‐promoted and unpromoted 10%Co/Al2O3 prepared via wet impregnation technique was investigated at 973 K for 72 h using a stoichiometric feed ratio (C2H5OH/CO2 = 1/1). La promoter substantially enhanced both metal dispersion and metal surface area from 0.11% to 0.64% and 0.08 to 0.43 m2 g−1, respectively. Ethanol and CO2 conversions appeared to be stable within 50 to 72 h after experiencing an initial activity drop. The conversion of C2H5OH and CO2 for La‐promoted catalyst was about 1.65 and 1.34 times greater than unpromoted counterpart in this order. The carbonaceous deposition was considerably decreased from 55.6% to 36.8% with La promotion due to La2O2CO3 intermediate formation. Additionally, 3%La‐10%Co/Al2O3 possessed greater oxygen vacancies acting as active sites for CO2adsorption and hence increasing carbon gasification. Even though graphitic and filamentous carbons were formed on used catalyst surface, La‐addition diminished graphite formation and increased the reactiveness of amorphous carbon. Wiley Online Library 2019-01 Article PeerReviewed pdf en http://umpir.ump.edu.my/id/eprint/24762/1/Stability%20evaluation%20of%20ethanol%20dry%20reforming%20on%20Lanthania%E2%80%90doped.pdf Fahim, Fayaz and Long, Giang Bach and Mahadi, Bahari and Trinh, Duy Nguyen and Khanh, B. Vu and Ramesh, Kanthasamy and Chanatip, Samart and Chinh, Nguyen‐Huy and Dai‐Viet, N. Vo (2019) Stability evaluation of ethanol dry reforming on Lanthania‐doped cobalt‐based catalysts for hydrogen‐rich syngas generation. International Journal of Energy Research, 43 (1). pp. 405-416. ISSN 0363-907X (print); 1099-114X (online) http://doi.org/10.1002/er.4274 http://doi.org/10.1002/er.4274
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
Fahim, Fayaz
Long, Giang Bach
Mahadi, Bahari
Trinh, Duy Nguyen
Khanh, B. Vu
Ramesh, Kanthasamy
Chanatip, Samart
Chinh, Nguyen‐Huy
Dai‐Viet, N. Vo
Stability evaluation of ethanol dry reforming on Lanthania‐doped cobalt‐based catalysts for hydrogen‐rich syngas generation
description Catalytic stability with time‐on‐stream is an important aspect in ethanol dry reforming (EDR) since catalysts could encounter undesirable deterioration arising from deposited carbon. This work examined the promotional effect of La on 10%Co/Al2O3 in terms of activity, stability, and characteristics. Catalysts were characterized by X‐ray diffraction (XRD), transmission electron microscopy (TEM), scanning electron microscopy (SEM), Raman, and X‐ray photoelectron spectroscopy (XPS) measurements whilst catalytic EDR performance of La‐promoted and unpromoted 10%Co/Al2O3 prepared via wet impregnation technique was investigated at 973 K for 72 h using a stoichiometric feed ratio (C2H5OH/CO2 = 1/1). La promoter substantially enhanced both metal dispersion and metal surface area from 0.11% to 0.64% and 0.08 to 0.43 m2 g−1, respectively. Ethanol and CO2 conversions appeared to be stable within 50 to 72 h after experiencing an initial activity drop. The conversion of C2H5OH and CO2 for La‐promoted catalyst was about 1.65 and 1.34 times greater than unpromoted counterpart in this order. The carbonaceous deposition was considerably decreased from 55.6% to 36.8% with La promotion due to La2O2CO3 intermediate formation. Additionally, 3%La‐10%Co/Al2O3 possessed greater oxygen vacancies acting as active sites for CO2adsorption and hence increasing carbon gasification. Even though graphitic and filamentous carbons were formed on used catalyst surface, La‐addition diminished graphite formation and increased the reactiveness of amorphous carbon.
format Article
author Fahim, Fayaz
Long, Giang Bach
Mahadi, Bahari
Trinh, Duy Nguyen
Khanh, B. Vu
Ramesh, Kanthasamy
Chanatip, Samart
Chinh, Nguyen‐Huy
Dai‐Viet, N. Vo
author_facet Fahim, Fayaz
Long, Giang Bach
Mahadi, Bahari
Trinh, Duy Nguyen
Khanh, B. Vu
Ramesh, Kanthasamy
Chanatip, Samart
Chinh, Nguyen‐Huy
Dai‐Viet, N. Vo
author_sort Fahim, Fayaz
title Stability evaluation of ethanol dry reforming on Lanthania‐doped cobalt‐based catalysts for hydrogen‐rich syngas generation
title_short Stability evaluation of ethanol dry reforming on Lanthania‐doped cobalt‐based catalysts for hydrogen‐rich syngas generation
title_full Stability evaluation of ethanol dry reforming on Lanthania‐doped cobalt‐based catalysts for hydrogen‐rich syngas generation
title_fullStr Stability evaluation of ethanol dry reforming on Lanthania‐doped cobalt‐based catalysts for hydrogen‐rich syngas generation
title_full_unstemmed Stability evaluation of ethanol dry reforming on Lanthania‐doped cobalt‐based catalysts for hydrogen‐rich syngas generation
title_sort stability evaluation of ethanol dry reforming on lanthania‐doped cobalt‐based catalysts for hydrogen‐rich syngas generation
publisher Wiley Online Library
publishDate 2019
url http://umpir.ump.edu.my/id/eprint/24762/
http://umpir.ump.edu.my/id/eprint/24762/
http://umpir.ump.edu.my/id/eprint/24762/
http://umpir.ump.edu.my/id/eprint/24762/1/Stability%20evaluation%20of%20ethanol%20dry%20reforming%20on%20Lanthania%E2%80%90doped.pdf
first_indexed 2023-09-18T22:37:40Z
last_indexed 2023-09-18T22:37:40Z
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