Synthesis and characterization of a La-Ni/α-Al2O3 catalyst and its use in pyrolysis of glycerol to syngas

The current paper reports on the kinetics of syngas production from glycerol catalytic pyrolysis over Ni/α-Al2O3 catalyst promoted by lanthanum. The 3 wt%La-20 wt%Ni/77 wt%α-Al2O3 catalyst was synthesized and its physiochemical properties were characterized. The BET specific surface area was 2.20 m2...

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Main Authors:	Nor Shahirah, Mohd Nasir, Jolius, Gimbun, Su, Shiung Lam, Yun Hau, Ng, Chin, Kui Cheng
Format:	Article
Language:	English
Published:	Elsevier Ltd 2019
Subjects:	TP Chemical technology
Online Access:	http://umpir.ump.edu.my/id/eprint/24729/ http://umpir.ump.edu.my/id/eprint/24729/ http://umpir.ump.edu.my/id/eprint/24729/ http://umpir.ump.edu.my/id/eprint/24729/1/Synthesis%20and%20characterization%20of%20a%20LaNi.pdf

id	ump-24729
recordtype	eprints
spelling	ump-247292019-04-19T07:40:22Z http://umpir.ump.edu.my/id/eprint/24729/ Synthesis and characterization of a La-Ni/α-Al2O3 catalyst and its use in pyrolysis of glycerol to syngas Nor Shahirah, Mohd Nasir Jolius, Gimbun Su, Shiung Lam Yun Hau, Ng Chin, Kui Cheng TP Chemical technology The current paper reports on the kinetics of syngas production from glycerol catalytic pyrolysis over Ni/α-Al2O3 catalyst promoted by lanthanum. The 3 wt%La-20 wt%Ni/77 wt%α-Al2O3 catalyst was synthesized and its physiochemical properties were characterized. The BET specific surface area was 2.20 m2.g−1, which was 0.11 m2.g−1 larger than the unpromoted Ni/α-Al2O3catalyst. Significantly, the BET results were supported by the FESEM image which showed that the promoted catalyst has smaller particle size compared to the unpromoted catalyst. The NH3 and CO2-TPD analyses indicates that the catalyst has net acidity with acid:base ratio of 1.12. Catalytic pyrolysis was performed in a 10 mm-ID stainless steel fixed bed reactor with reaction temperatures set at 973, 1023 and 1073 K, employing a weight-hourly-space-velocity (WHSV) of 4.5 × 104 ml g−1 h−1. From reaction studies, the highest glycerol conversion (XG) value was 36.96% at 1073 K. The resulting syngas has H2:CO ratios always lower than 2.0. Subsequently, mechanistic studies indicate that the catalytic glycerol pyrolysis occurred on single catalytic site via associative adsorption, with molecular surface reaction as the rate-determining step. Elsevier Ltd 2019-03 Article PeerReviewed pdf en http://umpir.ump.edu.my/id/eprint/24729/1/Synthesis%20and%20characterization%20of%20a%20LaNi.pdf Nor Shahirah, Mohd Nasir and Jolius, Gimbun and Su, Shiung Lam and Yun Hau, Ng and Chin, Kui Cheng (2019) Synthesis and characterization of a La-Ni/α-Al2O3 catalyst and its use in pyrolysis of glycerol to syngas. Renewable Energy, 132. pp. 1389-1401. ISSN 0960-1481 https://doi.org/10.1016/j.renene.2018.09.033 https://doi.org/10.1016/j.renene.2018.09.033
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 Nor Shahirah, Mohd Nasir Jolius, Gimbun Su, Shiung Lam Yun Hau, Ng Chin, Kui Cheng Synthesis and characterization of a La-Ni/α-Al2O3 catalyst and its use in pyrolysis of glycerol to syngas
description	The current paper reports on the kinetics of syngas production from glycerol catalytic pyrolysis over Ni/α-Al2O3 catalyst promoted by lanthanum. The 3 wt%La-20 wt%Ni/77 wt%α-Al2O3 catalyst was synthesized and its physiochemical properties were characterized. The BET specific surface area was 2.20 m2.g−1, which was 0.11 m2.g−1 larger than the unpromoted Ni/α-Al2O3catalyst. Significantly, the BET results were supported by the FESEM image which showed that the promoted catalyst has smaller particle size compared to the unpromoted catalyst. The NH3 and CO2-TPD analyses indicates that the catalyst has net acidity with acid:base ratio of 1.12. Catalytic pyrolysis was performed in a 10 mm-ID stainless steel fixed bed reactor with reaction temperatures set at 973, 1023 and 1073 K, employing a weight-hourly-space-velocity (WHSV) of 4.5 × 104 ml g−1 h−1. From reaction studies, the highest glycerol conversion (XG) value was 36.96% at 1073 K. The resulting syngas has H2:CO ratios always lower than 2.0. Subsequently, mechanistic studies indicate that the catalytic glycerol pyrolysis occurred on single catalytic site via associative adsorption, with molecular surface reaction as the rate-determining step.
format	Article
author	Nor Shahirah, Mohd Nasir Jolius, Gimbun Su, Shiung Lam Yun Hau, Ng Chin, Kui Cheng
author_facet	Nor Shahirah, Mohd Nasir Jolius, Gimbun Su, Shiung Lam Yun Hau, Ng Chin, Kui Cheng
author_sort	Nor Shahirah, Mohd Nasir
title	Synthesis and characterization of a La-Ni/α-Al2O3 catalyst and its use in pyrolysis of glycerol to syngas
title_short	Synthesis and characterization of a La-Ni/α-Al2O3 catalyst and its use in pyrolysis of glycerol to syngas
title_full	Synthesis and characterization of a La-Ni/α-Al2O3 catalyst and its use in pyrolysis of glycerol to syngas
title_fullStr	Synthesis and characterization of a La-Ni/α-Al2O3 catalyst and its use in pyrolysis of glycerol to syngas
title_full_unstemmed	Synthesis and characterization of a La-Ni/α-Al2O3 catalyst and its use in pyrolysis of glycerol to syngas
title_sort	synthesis and characterization of a la-ni/α-al2o3 catalyst and its use in pyrolysis of glycerol to syngas
publisher	Elsevier Ltd
publishDate	2019
url	http://umpir.ump.edu.my/id/eprint/24729/ http://umpir.ump.edu.my/id/eprint/24729/ http://umpir.ump.edu.my/id/eprint/24729/ http://umpir.ump.edu.my/id/eprint/24729/1/Synthesis%20and%20characterization%20of%20a%20LaNi.pdf
first_indexed	2023-09-18T22:37:36Z
last_indexed	2023-09-18T22:37:36Z
_version_	1777416700260515840

Synthesis and characterization of a La-Ni/α-Al2O3 catalyst and its use in pyrolysis of glycerol to syngas

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