Optimization of pyrolysis conditions for production of rice husk-based bio-oil as an energy carrier

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dc.contributor.authorWakatuntu, Joel
dc.contributor.authorOlupot, Peter Wilberforce
dc.contributor.authorJjagwe, Joseph
dc.contributor.authorMenya, Emmanuel
dc.contributor.authorOkure, Mackay
dc.date.accessioned2023-08-14T07:09:54Z
dc.date.available2023-08-14T07:09:54Z
dc.date.issued2023-11-09
dc.description.abstractBio-oil is an eco-friendly energy source with potential to substitute fossil-derived fuels. This study optimized pyrolysis conditions for production of bio-oil from rice husks. Response surface methodology based on central composite design was employed to maximize bio-oil yield and high heating value (HHV) while minimizing water and ash contents. The pyrolysis process conditions were; temperature (400–650 ◦C), heating rate (6000–9750 ◦Ch-1), and holding time (600–1800 s). Analysis of variance revealed that the linear model best fits the responses of bio-oil yield and water content. On the other hand, the quadratic model best fits the responses of HHV and ash content. Pyrolysis temperature had the greatest influence on each of the studied responses, followed by holding time and lastly heating rate. Optimum pyrolysis conditions were found to be; temperature (650 ◦C), heating rate (9750 ◦Ch-1), and holding time (1800 s), leading to bio-oil yield, HHV, water, and ash contents of 38.13%, 23.40 MJ/kg, 18.27%db, and 0.16%db, respectively. These results fall in the range of standard quality values for bio-oil in published literature where >15 MJ/kg, 20–30%, 0.15–0.25% are the recommended ranges for HHV, water, and ash contents, respectively. Results from the FTIR spectroscopy revealed that phenolic compounds contributed the most to bio-oil composition. Phenolic compounds positively influenced the quality of bio-oil due to their high calorific values. Gas chromatograph and mass spectrometry results showed peaks continuing to spill up to the maximum retention time indicating good thermal stability and bio-oil quality.en_US
dc.description.sponsorshipVolkswagen Foundation, Grant No. 96659.en_US
dc.identifier.otherhttps://doi.org/10.1016/j.rineng.2023.100947
dc.identifier.urihttps://hdl.handle.net/20.500.14270/210
dc.language.isoenen_US
dc.publisherElsevieren_US
dc.relation.ispartofseries;17 , 100947
dc.subjectFast pyrolysisen_US
dc.subjectRice husksen_US
dc.subjectBio-oil propertiesen_US
dc.subjectOptimizationen_US
dc.titleOptimization of pyrolysis conditions for production of rice husk-based bio-oil as an energy carrieren_US
dc.typeArticleen_US

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