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Green Synthesis of Biodiesel and Chemicals Production from Wet Chlorella vulgaris using A Subcritical Water-Ethanol Mixture
Medina Yasmin (a) and Siti Zullaikah (a*)

a) Deparment of Chemical Engineering, Institut Teknologi Sepuluh Nopember (ITS), Kampus ITS Keputih Sukolilo, Surabaya 60111 Indonesia
*szulle[at]chem-eng.its.ac.id, szullehakim[at]gmail.com


Abstract

A direct conversion to produce biodiesel and chemicals from wet algae under subcritical water-ethanol mixture was presented in this work. This method is known as a green synthesis due to no catalyst required and unaffected by initial moisture content of the feedstock. In this study, carbon dioxide as pressurized gas and ethyl acetate as co-solvent were used to elevate the yield and purity of biodiesel and chemicals. Temperature (125-200oC), reaction time (15-120 minutes), and algal water content (90-200%) were investigated to optimize yield and purity of biodiesel and chemicals. Wet algae has been subjected into hydrothermal reactor together with water-ethanol-ethyl acetate mixture to produce microalgae-based biodiesel. It has been revealed that longer reaction time affected in increasing yield of biodiesel and chemicals while increasing temperature to 200oC had slightly effect in elevate yield and purity of both products required. Moreover, low moisture content of algal still preferred to achieve high yield of products

Keywords: wet microalgae; fatty acid ethyl esters; ethyl levulinate; subcritical water-direct conversion

Topic: Chemical Engineering

Link: https://ifory.id/abstract/xEkqXy3NPzwB

Conference: Broad Exposure on Science and Technology (BEST 2019)

Plain Format | Corresponding Author (Medina Yasmin)

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