TY - JOUR
T1 - Modeling a Sustainable, Self-Energized Pine Dust Pyrolysis System With Staged Condensation for Optimal Recovery of Bio-Oil
AU - Charis, Gratitude
AU - Danha, Gwiranai
AU - Muzenda, Edison
AU - Nhubu, Trust
N1 - Funding Information:
We acknowledge the assistance of Arpad Imre and Leticia Petrescu from the University of Babes Bolyai for the useful insights shared during lectures around modeling and design using Chemical engineering simulation software. We also acknowledge Botswana International University of Science and Technology and the University of Johannesburg for all the support they have offered for this research work.
Publisher Copyright:
© Copyright © 2021 Charis, Danha, Muzenda and Nhubu.
Copyright:
Copyright 2021 Elsevier B.V., All rights reserved.
PY - 2021/2/4
Y1 - 2021/2/4
N2 - This simulation study explores sustainable improvements that could be made to a pine dust pyrolysis system to eliminate total dependence on external electrical energy supply and improve the yield of high-quality dry bio-oil. The components, stoichiometric yield and composition of oil, char and gas were modeled in ChemCAD using data from literature and results from biomass characterization and pyrolysis. A fast pyrolysis regime was used to increase the overall yield of dry oil fraction recovered and the char by-product was utilized to make the system energy self-sufficient. The optimization study focused on the condensation system whose parameters were varied at the provided optimum pyrolysis temperature. The recommended temperature for the primary condenser was 96–110°C which yielded 23.3–29.8 wt% dry oil with 2.4–4.4 wt% water content. The optimum temperature for the secondary condenser was 82°C whose bio-oil (∼2.92 wt%) had a moisture content of 7.5–10 wt% at constant primary condenser temperature between 96–110°C. The third condenser could be operated at ambient temperature. The results were validated using both information reported in literature and results from the previous experimental study. Such a simple model built by careful selection of the model bio-oil components is useful in estimating the optimal parameters for the biomass pyrolysis staged condensation system.
AB - This simulation study explores sustainable improvements that could be made to a pine dust pyrolysis system to eliminate total dependence on external electrical energy supply and improve the yield of high-quality dry bio-oil. The components, stoichiometric yield and composition of oil, char and gas were modeled in ChemCAD using data from literature and results from biomass characterization and pyrolysis. A fast pyrolysis regime was used to increase the overall yield of dry oil fraction recovered and the char by-product was utilized to make the system energy self-sufficient. The optimization study focused on the condensation system whose parameters were varied at the provided optimum pyrolysis temperature. The recommended temperature for the primary condenser was 96–110°C which yielded 23.3–29.8 wt% dry oil with 2.4–4.4 wt% water content. The optimum temperature for the secondary condenser was 82°C whose bio-oil (∼2.92 wt%) had a moisture content of 7.5–10 wt% at constant primary condenser temperature between 96–110°C. The third condenser could be operated at ambient temperature. The results were validated using both information reported in literature and results from the previous experimental study. Such a simple model built by careful selection of the model bio-oil components is useful in estimating the optimal parameters for the biomass pyrolysis staged condensation system.
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U2 - 10.3389/fenrg.2020.594073
DO - 10.3389/fenrg.2020.594073
M3 - Article
AN - SCOPUS:85101157458
SN - 2296-598X
VL - 8
JO - Frontiers in Energy Research
JF - Frontiers in Energy Research
M1 - 594073
ER -