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 usi...

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Main Authors: Awad, A., Alnarabiji, M.S., Salam, M.A., Vo, D.-V.N., Setiabudi, H.D., Abdullah, B.
Format: Article
Institution: Universiti Teknologi Petronas
Record Id / ISBN-0: utp-eprints.29871 /
Published: Wiley-Blackwell 2020
Online Access: https://www.scopus.com/inward/record.uri?eid=2-s2.0-85092188605&doi=10.1002%2fslct.202001998&partnerID=40&md5=dd764a6246d78744048464c109c08436
http://eprints.utp.edu.my/29871/
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spelling utp-eprints.298712022-03-29T03:15:44Z Synthesis, Characterisation, and Performance Evaluation of Promoted Ni-Based Catalysts for Thermocatalytic Decomposition of Methane Awad, A. Alnarabiji, M.S. Salam, M.A. Vo, D.-V.N. Setiabudi, H.D. Abdullah, B. 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. © 2020 Wiley-VCH GmbH Wiley-Blackwell 2020 Article NonPeerReviewed https://www.scopus.com/inward/record.uri?eid=2-s2.0-85092188605&doi=10.1002%2fslct.202001998&partnerID=40&md5=dd764a6246d78744048464c109c08436 Awad, A. and Alnarabiji, M.S. and Salam, M.A. and Vo, D.-V.N. and Setiabudi, H.D. and Abdullah, B. (2020) Synthesis, Characterisation, and Performance Evaluation of Promoted Ni-Based Catalysts for Thermocatalytic Decomposition of Methane. ChemistrySelect, 5 (37). pp. 11471-11482. http://eprints.utp.edu.my/29871/
institution Universiti Teknologi Petronas
collection UTP Institutional Repository
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. © 2020 Wiley-VCH GmbH
format Article
author Awad, A.
Alnarabiji, M.S.
Salam, M.A.
Vo, D.-V.N.
Setiabudi, H.D.
Abdullah, B.
spellingShingle Awad, A.
Alnarabiji, M.S.
Salam, M.A.
Vo, D.-V.N.
Setiabudi, H.D.
Abdullah, B.
Synthesis, Characterisation, and Performance Evaluation of Promoted Ni-Based Catalysts for Thermocatalytic Decomposition of Methane
author_sort Awad, A.
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-Blackwell
publishDate 2020
url https://www.scopus.com/inward/record.uri?eid=2-s2.0-85092188605&doi=10.1002%2fslct.202001998&partnerID=40&md5=dd764a6246d78744048464c109c08436
http://eprints.utp.edu.my/29871/
_version_ 1741197312500170752
score 11.62408

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