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Kinetics analysis on isothermal torrefaction of sawdust in a fixed-bed reactor using the Coats-Redfern method and functional group analysis using FTIR spectroscopy / Alina Rahayu Mohamed, Noor Hasyierah Mohd Salleh and Nur Nadhirah Nordin

In this study, torrefaction of sawdust was performed in a fixed bed reactor at different torrefaction temperatures and holding times of 200–300 °C and 20–60 mins respectively under inert nitrogen environment and isothermal condition. It was determined that the mass yield decreased upon increasing to...

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Main Authors: Mohamed, Alina Rahayu, Mohd Salleh, Noor Hasyierah, Nordin, Nur Nadhirah
Format: Article
Language:English
Published: Universiti Teknologi MARA Shah Alam 2023
Subjects:
Chemical engineering
Online Access:https://ir.uitm.edu.my/id/eprint/76360/1/76360.pdf
https://ir.uitm.edu.my/id/eprint/76360/
https://mjcetfkk.uitm.edu.my/
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spelling my.uitm.ir.763602023-04-27T03:45:52Z https://ir.uitm.edu.my/id/eprint/76360/ Kinetics analysis on isothermal torrefaction of sawdust in a fixed-bed reactor using the Coats-Redfern method and functional group analysis using FTIR spectroscopy / Alina Rahayu Mohamed, Noor Hasyierah Mohd Salleh and Nur Nadhirah Nordin mjcet Mohamed, Alina Rahayu Mohd Salleh, Noor Hasyierah Nordin, Nur Nadhirah Chemical engineering In this study, torrefaction of sawdust was performed in a fixed bed reactor at different torrefaction temperatures and holding times of 200–300 °C and 20–60 mins respectively under inert nitrogen environment and isothermal condition. It was determined that the mass yield decreased upon increasing torrefaction temperature from 200 to 300 °C and holding time 20 to 60 mins. This could be contributed by the complete elimination of hemicellulosic fraction and slight removal of cellulosic fractions of sawdust which occurred at higher torrefaction temperature of 260–300 °C. The values of kinetics parameters such as activation energy, Ea and pre-exponential factor (ln A) for the torrefaction of sawdust at holding times of 20, 40, and 60 mins were evaluated using the Coats-Redfern method. The activation energy for torrefaction of sawdust reduced from 48.2054 to 41.7662 kJ/mol when the holding time for the reaction was increased from 20 to 60 mins. It was determined that the torrefaction of sawdust at 60 mins was more reactive than at 20 mins holding time. FTIR analysis on raw and torrefied sawdust showed the presence of OH hydroxyl group, C–H alkane, and C=O from ester or carboxylic acids groups. Universiti Teknologi MARA Shah Alam 2023-04 Article PeerReviewed text en https://ir.uitm.edu.my/id/eprint/76360/1/76360.pdf Kinetics analysis on isothermal torrefaction of sawdust in a fixed-bed reactor using the Coats-Redfern method and functional group analysis using FTIR spectroscopy / Alina Rahayu Mohamed, Noor Hasyierah Mohd Salleh and Nur Nadhirah Nordin. (2023) Malaysian Journal of Chemical Engineering and Technology (MJCET), 6 (1): 3. pp. 17-21. ISSN 2682-8588 https://mjcetfkk.uitm.edu.my/
institution Universiti Teknologi Mara
building Tun Abdul Razak Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Teknologi Mara
content_source UiTM Institutional Repository
url_provider http://ir.uitm.edu.my/
language English
topic Chemical engineering
spellingShingle Chemical engineering
Mohamed, Alina Rahayu
Mohd Salleh, Noor Hasyierah
Nordin, Nur Nadhirah
Kinetics analysis on isothermal torrefaction of sawdust in a fixed-bed reactor using the Coats-Redfern method and functional group analysis using FTIR spectroscopy / Alina Rahayu Mohamed, Noor Hasyierah Mohd Salleh and Nur Nadhirah Nordin
description In this study, torrefaction of sawdust was performed in a fixed bed reactor at different torrefaction temperatures and holding times of 200–300 °C and 20–60 mins respectively under inert nitrogen environment and isothermal condition. It was determined that the mass yield decreased upon increasing torrefaction temperature from 200 to 300 °C and holding time 20 to 60 mins. This could be contributed by the complete elimination of hemicellulosic fraction and slight removal of cellulosic fractions of sawdust which occurred at higher torrefaction temperature of 260–300 °C. The values of kinetics parameters such as activation energy, Ea and pre-exponential factor (ln A) for the torrefaction of sawdust at holding times of 20, 40, and 60 mins were evaluated using the Coats-Redfern method. The activation energy for torrefaction of sawdust reduced from 48.2054 to 41.7662 kJ/mol when the holding time for the reaction was increased from 20 to 60 mins. It was determined that the torrefaction of sawdust at 60 mins was more reactive than at 20 mins holding time. FTIR analysis on raw and torrefied sawdust showed the presence of OH hydroxyl group, C–H alkane, and C=O from ester or carboxylic acids groups.
format Article
author Mohamed, Alina Rahayu
Mohd Salleh, Noor Hasyierah
Nordin, Nur Nadhirah
author_facet Mohamed, Alina Rahayu
Mohd Salleh, Noor Hasyierah
Nordin, Nur Nadhirah
author_sort Mohamed, Alina Rahayu
title Kinetics analysis on isothermal torrefaction of sawdust in a fixed-bed reactor using the Coats-Redfern method and functional group analysis using FTIR spectroscopy / Alina Rahayu Mohamed, Noor Hasyierah Mohd Salleh and Nur Nadhirah Nordin
title_short Kinetics analysis on isothermal torrefaction of sawdust in a fixed-bed reactor using the Coats-Redfern method and functional group analysis using FTIR spectroscopy / Alina Rahayu Mohamed, Noor Hasyierah Mohd Salleh and Nur Nadhirah Nordin
title_full Kinetics analysis on isothermal torrefaction of sawdust in a fixed-bed reactor using the Coats-Redfern method and functional group analysis using FTIR spectroscopy / Alina Rahayu Mohamed, Noor Hasyierah Mohd Salleh and Nur Nadhirah Nordin
title_fullStr Kinetics analysis on isothermal torrefaction of sawdust in a fixed-bed reactor using the Coats-Redfern method and functional group analysis using FTIR spectroscopy / Alina Rahayu Mohamed, Noor Hasyierah Mohd Salleh and Nur Nadhirah Nordin
title_full_unstemmed Kinetics analysis on isothermal torrefaction of sawdust in a fixed-bed reactor using the Coats-Redfern method and functional group analysis using FTIR spectroscopy / Alina Rahayu Mohamed, Noor Hasyierah Mohd Salleh and Nur Nadhirah Nordin
title_sort kinetics analysis on isothermal torrefaction of sawdust in a fixed-bed reactor using the coats-redfern method and functional group analysis using ftir spectroscopy / alina rahayu mohamed, noor hasyierah mohd salleh and nur nadhirah nordin
publisher Universiti Teknologi MARA Shah Alam
publishDate 2023
url https://ir.uitm.edu.my/id/eprint/76360/1/76360.pdf
https://ir.uitm.edu.my/id/eprint/76360/
https://mjcetfkk.uitm.edu.my/
_version_ 1765300358653935616
score 13.211869

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