Abstract
In the present study, a brown macroalgal biomass was selected as a case study as an abundant Indian feedstock for pyrolysis. Pyrolysis of biomass produces a bio-oil at optimum temperature of 500 °C, with a pH of 2.72, moisture content of 30.04 wt%, and viscosity at room temperature of 62.37 cP. The acid content of bio-oil causes condensation reactions of furfural-like components which results in an increase of viscosity over a long period. Aging studies of bio-oil confirmed that moisture content and viscosity increased during storage at the same time as phase separation occurred over time. Thus, stabilization of bio-oil was performed to convert acids into esters to maximize the shelf life of bio-oil. The process improves the properties and quality of the bio-oil, extending its shelf life for 60 days under room temperature conditions. In addition, detail chemical characterization shows the bio-oil produces a number of chemical compounds such as carboxylic acid (7.31%), carbonyl group (23.1%), furan (11.42%), and phenols (21.26%) in higher amount.
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