Co-pyrolysis of microalgae and municipal solid waste: a thermogravimetric study to discern synergy during co-pyrolysis process

Varsha, S.S.V., Vuppaladadiyam, Arun K., Shehzad, Farrukh, Ghaedi, Hosein, Murugavelh, S., Dong, Weiguo, and Antunes, Elsa (2021) Co-pyrolysis of microalgae and municipal solid waste: a thermogravimetric study to discern synergy during co-pyrolysis process. Journal of the Energy Institute, 94. pp. 29-38.

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Synergism during the co-pyrolysis of microalgae (CC), municipal solid waste (MSW), and their blends(CC/MSW) (w/w %), 25/75 (CM-1), 50/50 (CM-2), and 75/25 (CM-3), was evaluated based on thermal decomposition pattern, evolved gases, rate and extent of thermal decomposition, and kinetic parameters. Three stages of devolatilization attributed to dehydration, devolatilization of major structural com-pounds of biomass and decomposition of solid residues were noticed during the co-pyrolysis of biomass samples. The main pyrolysis stages for CC, MSW, CM-1, CM-2 and CM-3 were 175e520, 151-523, 164-504,168-510, 160e501 °C, respectively. Microalgae, CC, appeared to be thermally resistant, while MSW is noticed to be thermally sensitive. The kinetics analysis was studied by deconvoluting the DTG profile into independent stages, followed by application of isoconversional methods to evaluate the activation energy and the pre-exponential factor. Furthermore, the reaction mechanism of each stage was determined by using the master plot method. The semi-quantitative method was used to evaluate the evolved gases and CO, CO2 and H2 were noticed to be the dominant gas species. The obtained thermal and kinetic data for co-pyrolysis of microalgae and MSW can serve are basis for scale-up and reactor design of pyrolysis process for similar kind of waste streams.

Item ID: 65462
Item Type: Article (Research - C1)
ISSN: 1746-0220
Keywords: Biomass; Microalgae; Municipal solid waste; Co-pyrolysis; Synergy; Isoconversional kinetics
Copyright Information: © 2020 Energy Institute. Published by Elsevier Ltd. All rights reserved.
Date Deposited: 07 Jan 2021 23:44
FoR Codes: 40 ENGINEERING > 4004 Chemical engineering > 400499 Chemical engineering not elsewhere classified @ 100%
SEO Codes: 85 ENERGY > 8505 Renewable Energy > 850501 Biofuel (Biomass) Energy @ 50%
97 EXPANDING KNOWLEDGE > 970109 Expanding Knowledge in Engineering @ 50%
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