Synthesis, characterisation, and performance evaluation of promoted Ni‐based catalysts for thermocatalytic decomposition of methane

Thermocatalyatic decomposition (TCD) of methane to COX free hydrogen and carbon nanofibre (CNF) was investigated over a series of self‐designed monometallic Ni catalyst and bimetallic Ni−Cu and Ni−Pd catalysts. The catalysts were synthesised from the wet impregnation method and characterised using a...

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Main Authors: Awad, Ali, Alnarabiji, Mohamad S., Salam, M. A., Vo, Dai-Viet N., Setiabudi, H. D., Bawadi, Abdullah
Format: Article
Language:English
Published: Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim 2020
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Online Access:http://umpir.ump.edu.my/id/eprint/31065/1/Synthesis%2C%20characterisation%2C%20and%20performance%20evaluation%20of%20promoted%20Ni.pdf
http://umpir.ump.edu.my/id/eprint/31065/
https://doi.org/10.1002/slct.202001998
https://doi.org/10.1002/slct.202001998
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spelling my.ump.umpir.310652021-04-28T05:06:49Z http://umpir.ump.edu.my/id/eprint/31065/ Synthesis, characterisation, and performance evaluation of promoted Ni‐based catalysts for thermocatalytic decomposition of methane Awad, Ali Alnarabiji, Mohamad S. Salam, M. A. Vo, Dai-Viet N. Setiabudi, H. D. Bawadi, Abdullah TP Chemical technology Thermocatalyatic decomposition (TCD) of methane to COX free hydrogen and carbon nanofibre (CNF) was investigated over a series of self‐designed monometallic Ni catalyst and bimetallic Ni−Cu and Ni−Pd catalysts. The catalysts were synthesised from the wet impregnation method and characterised using a series of complementary techniques include TGA, XRD, BET, TPR, FESEM, TEM, and Raman Spectroscopy. Despite a substantial reduction of surface area in the promoted catalysts, the catalytic activity of the promoted catalyst was enhanced due to the nature of the process which is a metal‐catalysed reaction. As a whole, bimetallic Pd−Ni catalyst with a surface area of 2.76 m2 g−1 possesed the highest conversion of 77 % after 6 h reaction. The overall TCD reaction was found to be first‐order with the calculated activation energy, Ea of 38 kJ mol−1. The methane consumption rates at 1023 K and 1073 K were 0.5 mol s−1gcat−1 and 0.58×104 mol s−1gcat−1 respectively. Meanwhile, the methane consumption rates improved considerably from 0.58 mol s−1gcat−1 to 0.67×104 mol s−1gcat−1 under the methane partial pressure of 41 kPa. The XRD profile of the fresh catalysts revealed that mixed oxides were formed over the surface of the support upon the addition of Cu and Pd to 50 %Ni/Al2O3. Moreover, the formation of carbon nanofibers followed both tip and base growth mechanisms as evident from the TEM images. Larger and wider carbon fibres were found in the Pd promoted catalyst. Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim 2020-10-08 Article PeerReviewed pdf en http://umpir.ump.edu.my/id/eprint/31065/1/Synthesis%2C%20characterisation%2C%20and%20performance%20evaluation%20of%20promoted%20Ni.pdf Awad, Ali and Alnarabiji, Mohamad S. and Salam, M. A. and Vo, Dai-Viet N. and Setiabudi, H. D. and Bawadi, Abdullah (2020) Synthesis, characterisation, and performance evaluation of promoted Ni‐based catalysts for thermocatalytic decomposition of methane. ChemistrySelect, 5 (37). pp. 11471-11482. ISSN 2365-6549 https://doi.org/10.1002/slct.202001998 https://doi.org/10.1002/slct.202001998
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
topic TP Chemical technology
spellingShingle TP Chemical technology
Awad, Ali
Alnarabiji, Mohamad S.
Salam, M. A.
Vo, Dai-Viet N.
Setiabudi, H. D.
Bawadi, Abdullah
Synthesis, characterisation, and performance evaluation of promoted Ni‐based catalysts for thermocatalytic decomposition of methane
description Thermocatalyatic decomposition (TCD) of methane to COX free hydrogen and carbon nanofibre (CNF) was investigated over a series of self‐designed monometallic Ni catalyst and bimetallic Ni−Cu and Ni−Pd catalysts. The catalysts were synthesised from the wet impregnation method and characterised using a series of complementary techniques include TGA, XRD, BET, TPR, FESEM, TEM, and Raman Spectroscopy. Despite a substantial reduction of surface area in the promoted catalysts, the catalytic activity of the promoted catalyst was enhanced due to the nature of the process which is a metal‐catalysed reaction. As a whole, bimetallic Pd−Ni catalyst with a surface area of 2.76 m2 g−1 possesed the highest conversion of 77 % after 6 h reaction. The overall TCD reaction was found to be first‐order with the calculated activation energy, Ea of 38 kJ mol−1. The methane consumption rates at 1023 K and 1073 K were 0.5 mol s−1gcat−1 and 0.58×104 mol s−1gcat−1 respectively. Meanwhile, the methane consumption rates improved considerably from 0.58 mol s−1gcat−1 to 0.67×104 mol s−1gcat−1 under the methane partial pressure of 41 kPa. The XRD profile of the fresh catalysts revealed that mixed oxides were formed over the surface of the support upon the addition of Cu and Pd to 50 %Ni/Al2O3. Moreover, the formation of carbon nanofibers followed both tip and base growth mechanisms as evident from the TEM images. Larger and wider carbon fibres were found in the Pd promoted catalyst.
format Article
author Awad, Ali
Alnarabiji, Mohamad S.
Salam, M. A.
Vo, Dai-Viet N.
Setiabudi, H. D.
Bawadi, Abdullah
author_facet Awad, Ali
Alnarabiji, Mohamad S.
Salam, M. A.
Vo, Dai-Viet N.
Setiabudi, H. D.
Bawadi, Abdullah
author_sort Awad, Ali
title Synthesis, characterisation, and performance evaluation of promoted Ni‐based catalysts for thermocatalytic decomposition of methane
title_short Synthesis, characterisation, and performance evaluation of promoted Ni‐based catalysts for thermocatalytic decomposition of methane
title_full Synthesis, characterisation, and performance evaluation of promoted Ni‐based catalysts for thermocatalytic decomposition of methane
title_fullStr Synthesis, characterisation, and performance evaluation of promoted Ni‐based catalysts for thermocatalytic decomposition of methane
title_full_unstemmed Synthesis, characterisation, and performance evaluation of promoted Ni‐based catalysts for thermocatalytic decomposition of methane
title_sort synthesis, characterisation, and performance evaluation of promoted ni‐based catalysts for thermocatalytic decomposition of methane
publisher Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim
publishDate 2020
url http://umpir.ump.edu.my/id/eprint/31065/1/Synthesis%2C%20characterisation%2C%20and%20performance%20evaluation%20of%20promoted%20Ni.pdf
http://umpir.ump.edu.my/id/eprint/31065/
https://doi.org/10.1002/slct.202001998
https://doi.org/10.1002/slct.202001998
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