Journal
BIOMASS CONVERSION AND BIOREFINERY
Volume 12, Issue 11, Pages 5031-5043Publisher
SPRINGER HEIDELBERG
DOI: 10.1007/s13399-020-00982-w
Keywords
Pyrolysis; Scenedesmus obliquus; Bio-char; Bio-oil
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Funding
- Department of Biotechnology, Government of India - Indo-Brazil project entitled Integrated Biorefinery Approach towards production of sustainable fuel and chemicals from Algal biobased systems [DBT/IC-2/Indo-Brazil/2016-19/04]
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The pyrolysis of Scenedesmus obliquus in a fixed-bed vertical reactor was investigated, and the results showed that it could produce bio-oil and bio-char within a temperature range of 350 to 550 degrees C, with the yields influenced by temperature. The bio-oil had the highest higher heating value at 550 degrees C, while the bio-char was porous, amorphous, heterogeneous, and basic in nature. Therefore, Scenedesmus obliquus has the potential to be used as an alternative energy source.
Scenedesmus obliquusis a locally available microalgae in the north-eastern region of India. Pyrolysis ofScenedesmus obliquushas been performed in a fixed-bed vertical reactor, at 350 to 550 degrees C temperature range with 40 degrees C/min heating rate. The physicochemical properties of the solid and liquid yields were investigated. The influence of temperature on the amount of product yields was analysed. The highest bio-oil yield of 20.42% and bio-char yield of 58.63% were achieved at 500 degrees C and 350 degrees C, respectively.H-1 NMR and FTIR were performed for the bio-oil characterisation. The higher heating value of the bio-oil was found to be highest 32.97 MJ/kg at 550 degrees C. SEM-EDX, FTIR, and XRD techniques were used for the bio-char analysis and characterisation. The resulted char was found to be porous, amorphous, heterogeneous, and basic in nature. The present work suggestsScenedesmus obliquusas a potential candidate for the production of energy substituting conventional fuel sources.
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