Biodiesel Additive Performance from Tertiary Butylhydroquinone and Surfactant Glycerol Monostearate

Silvya Yusri, valerie andrews, Hery Sutanto, Evita Herawati Legowo

Abstract


As the world continues to shift to cleaner alternatives to replace the conventional use of fossil fuel, a promising renewable alternative in the transport sector is biodiesel, a type of biofuel, which commonly made from vegetable oils through the process of transesterification. However, the production process faces a few challenges due to unsaturation in ester chains making it oxidatively unstable and therefore addition of phenolic antioxidants and surfactants are often necessary. Previous studies have shown that tertiary butylhydroquinone (TBHQ) and glycerol monostearate (GMS) performs well as additives in biodiesel by increasing its oxidative stability. However, the complete parameter of its performance has yet been tested. This research aims to analyze the performance of biodiesel additives TBHQ and GMS in pure biodiesel (B100) and commercial blended biodiesel (B30) from CPO according to four parameters; the acid number, iodine value, kinematic viscosity, and the induction period according to the Indonesian standards. Within the span of four weeks results shows that addition of additives TBHQ and GMS was able to significantly improve oxidative stability in terms of acid number, iodine value, and induction period. The addition of TBHQ increased the viscosity, however GMS was able to inhibit the rise. Nevertheless, all the results complied under Indonesian standards for biodiesel.

Keywords


Biodiesel Additives; Antioxidant; Tertiary Butylhydroquinone; Glycerol Monostearate; Oxidative Stability of Biodiesel

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DOI (PDF): https://doi.org/10.20508/ijrer.v13i2.13945.g8760

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