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Stability Analysis of Mahua Seed and Waste Polystyrene Co-pyrolytic Oil

Krushna Prasad Shadangi, Kaustubha Mohanty


Biomass pyrolytic oil is a complex mixture of organic compounds and obtained in a non-equilibrium state. Hence, the physical properties of bio-oil such as calorific value, viscosity, pH, density, flow ability and chemical compositions vary during storage. In this study, co-pyrolysis of Mahua seed was performed with waste polystyrene and studied the fuel properties and composition. The co-pyrolytic oil was produced at 2:1 ratio of seed to waste polystyrene using a semi batch reactor. Since, the previous study confirmed that 2:1 ratio was the optimum ratio of seed to waste polystyrene resulted in high calorific value pyrolytic oil, the stability of the co-pyrolytic oil is performed in the present study. The stability study of the co-pyrolytic oil was observed for 40 days at 40 °C. It was confirmed that Mahua seed and waste polystyrene co-pyrolytic oil was not stable after 10 days of aging. The fuel properties and composition varied with the aging time. The reduction in the calorific value was observed beyond 20 days of aging whereas viscosity started reducing with aging.

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