Microwave torrefaction of sawdust as biomass energy source

Fatin Azira, Abd Rahim and Nurhuda Dini, Faridon and Mazni, Ismail and Ruwaida, Abdul Rasid and A., Kadri and Engliman, N. S. (2022) Microwave torrefaction of sawdust as biomass energy source. In: The 6th National Conference for Postgraduate Research (NCON-PGR 2022) , 15 November 2022 , Virtual Conference, Universiti Malaysia Pahang, Malaysia. p. 206..

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Sawdust is one of the wood wastes produced by the timber industry. Sawdust has excellent potential as an energy source. However, sawdust needs to undergo some improvements by the torrefaction process as it contains higher moisture content and volatile matter. Torrefaction is a thermal method that can enhance sawdust properties as it operates at low temperatures within 200300°C with the presence of nitrogen gas. Microwave torrefaction is introduced to shorten residence time due to fast heating rather than conventional heating. This study focused on microwave torrefaction of sawdust to be used as an energy source by improving the sawdust's chemical compositions and energy potential. The experiment was conducted at different residence times (5, 10, 20 and 30 minutes) and nitrogen gas flowrate (30, 60 and 90 mL/min) for 20 minutes at 1000W microwave power. The colour of torrefied sawdust was observed, and the result showed it turned from light brown to slightly black because of the higher carbon content inside it as the removal of volatile matter during the process. The HHV values were measured by bomb calorimeter, and proximate analysis was determined using TGA. The result showed the improvement in torrefied sawdust that it becomes low in moisture content, higher carbon content and heating value due to the degradation of the structural components, mainly hemicellulose inside the sawdust that releases the volatile matter as the temperature increases. Overall, the microwave torrefaction process reduced the moisture content to 28%, increased HHV to 50%, and increased carbon to 60%, making sawdust a good energy source

Item Type: Conference or Workshop Item (Lecture)
Uncontrolled Keywords: Biomass; Microwave torrefaction; Sawdust; Energy source.
Subjects: Q Science > QD Chemistry
T Technology > T Technology (General)
T Technology > TA Engineering (General). Civil engineering (General)
T Technology > TP Chemical technology
Faculty/Division: Institute of Postgraduate Studies
Faculty of Chemical and Process Engineering Technology
Depositing User: Mr Muhamad Firdaus Janih@Jaini
Date Deposited: 13 Dec 2023 07:28
Last Modified: 13 Dec 2023 07:28
URI: http://umpir.ump.edu.my/id/eprint/37217
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