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Optimizing yield and quality of bio-oil: a comparative study of Acacia tortilis and Pine dust

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dc.contributor.author Charis, Gratitude
dc.contributor.author Danha, Gwiranai
dc.contributor.author Muzenda, Edison
dc.date.accessioned 2021-06-08T11:33:37Z
dc.date.available 2021-06-08T11:33:37Z
dc.date.issued 2020-05
dc.identifier.citation Charis, G., Danha, G. and Muzenda, E. ( 2020) Optimizing yield and quality of bio-oil: a comparative study of Acacia tortilis and Pine dust. Processes, 8 (5) 1-19. https://doi.org/10.3390/pr8050551. en_US
dc.identifier.issn 2227-9717
dc.identifier.uri http://repository.biust.ac.bw/handle/123456789/293
dc.description.abstract We collected pine dust and Acacia tortilis samples from Zimbabwe and Botswana, respectively. We then pyrolyzed them in a bench-scale plant under varying conditions. This investigation aimed to determine an optimum temperature that will give result to maximum yield and quality of the bio-oil fraction. Our experimental results show that we obtain the maximum yield of the oil fraction at a pyrolysis temperature of 550 ◦C for the acacia and at 500 ◦C for the pine dust. Our results also show that we obtain an oil fraction with a heating value (HHV) of 36.807 MJ/kg using acacia as the feed material subject to a primary condenser temperature of 140 ◦C. Under the same pyrolysis temperature, we obtain an HHV value of 15.78 MJ/kg using pine dust as the raw material at a primary condenser temperature of 110 ◦C. The bio-oil fraction we obtain from Acacia tortilis at these condensation temperatures has an average pH value of 3.42 compared to that of 2.50 from pine dust. The specific gravity of the oil from Acacia tortilis is 1.09 compared to that of 1.00 from pine dust. We elucidated that pine dust has a higher bio-oil yield of 46.1% compared to 41.9% obtained for acacia. Although the heavy oils at condenser temperatures above 100 ◦C had good HHVs, the yields were low, ranging from 2.8% to 4.9% for acacia and 0.2% to 12.7% for pine dust. Our future work will entail efforts to improve the yield of the heavy oil fraction and scale up our results for trials on plant scale capacity en_US
dc.description.sponsorship The authors acknowledge the support of the Botswana International University of Science and Technology and the University of Johannesburg. They also acknowledge the University of South Africa for access to their equipment for some of the experiments and tests. en_US
dc.language.iso en en_US
dc.publisher MDPI (Basel, Switzerland) en_US
dc.subject Acacia tortilis en_US
dc.subject Biofuel en_US
dc.subject Biomass en_US
dc.subject Pine dust en_US
dc.subject Pyrolysis en_US
dc.title Optimizing yield and quality of bio-oil: a comparative study of Acacia tortilis and Pine dust en_US
dc.description.level phd en_US
dc.description.accessibility unrestricted en_US
dc.description.department cme en_US


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