Influence of microalgae on synergism during co-pyrolysis with organic waste biomass: a thermogravimetric and kinetic analysis

Vuppaladadiyam, Arun K., Antunes, Elsa, Sanchez, Paula Blanco, Duan, Huabo, and Zhao, Ming (2021) Influence of microalgae on synergism during co-pyrolysis with organic waste biomass: a thermogravimetric and kinetic analysis. Renewable Energy, 167. pp. 42-55.

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The synergistic influence of microalgae on the two forms of organic waste biomasses, namely biomass wastes (BW) and its digested form (DBW), during co-pyrolysis was evaluated based on the thermal decomposition behaviour, gas yields, extent of thermal decomposition and reaction kinetics. The biomasses and their blends were co-pyrolysed at three different heating rates (10, 15 and 20C/min) in a thermogravimetric analyzer coupled with a mass spectrometer. Initial assessment, based on TG-DTG data, revealed that the thermal degradation can be divided into three zones (50-150C, 150-550C and 550-800C) for all the biomasses and their blends. The thermogravimetric data was used to evaluate the kinetic triplet, which include apparent activation energy (Ea), pre-exponential factor (A) and reaction mechanism, f(a). Semi-quantitative method was used to quantify the gas species, H2, CO2 and CO were dominant species, implying the water gas reactions and oxidation reactions were predominant. The synergistic influence of microalgae was clearly evident in terms of reaction kinetics, as noted in the reduction in the apparent activation energy and increase in the total gas yields. The obtained kinetic triplet and thermodynamic parameters are expected to facilitate the design and optimization of co-pyrolysis of microalgae with other forms of organic wastes.

Item ID: 65460
Item Type: Article (Research - C1)
ISSN: 1879-0682
Keywords: Biomass; Co-pyrolysis; Thermogravimetric; Kinetic analysis; Microalgae
Copyright Information: © 2020 Elsevier Ltd. All rights reserved.
Funders: National Key Research and Development Project of China (NKRDPC), Guangdong Provincial Key Research and Development Program (GP), Natural Science Foundation of Guangdong Province (NSFGP)
Projects and Grants: NKRDPC 2019YFC1904602, GP No. 2019B110209001, NSFGP 2017A030313438
Date Deposited: 07 Jan 2021 23:56
FoR Codes: 40 ENGINEERING > 4004 Chemical engineering > 400499 Chemical engineering not elsewhere classified @ 100%
SEO Codes: 97 EXPANDING KNOWLEDGE > 970109 Expanding Knowledge in Engineering @ 50%
85 ENERGY > 8505 Renewable Energy > 850501 Biofuel (Biomass) Energy @ 50%
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