Evaluating Antioxidant Eugenol on Oxidation Stability of Biodiesel Synthesized from Used Frying Oil

Eliane Ferreira De Souza,Alberto Adriano Cavalheiro,Margarete Soares Da Silva,Talita Cuenca Pina Moreira Ramos,Euclesio Simionatto,Antonio Rogério Fiorucci

doi:10.17807/orbital.v10i1.1030

Eliane Ferreira De Souza, Alberto Adriano Cavalheiro + Show 4 more

Open Access

https://doi.org/10.17807/orbital.v10i1.1030

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Abstract

Due the environmental appeal, the demand of new processes and inputs has been increasing considerably in the last decade. Biodiesel is a biodegradable fuel obtained from vegetable oils or animal fats, including those discarded after use. The methyl and ethyl transesterification routes for biodiesel production were tested by using residual frying oil as raw material through the homogeneous basic catalyst, such as sodium hydroxide. In present work, it was evaluated the efficiency of the eugenol on the oxidation stability of the methyl and ethyl biodiesels synthesized from residual frying oil. The chromatographic analysis determined that the conversion of the yield to the methyl and ethylic esters (biodiesel) was 90.6 % and 87.3 %(m/m) respectively. For both biodiesel samples a rise of the eugenol concentration added resulted in an increase of the induction period (oxidation stability parameter evaluated by Rancimat method), with a consequent reduction of the acid number. Taking these results into account, it can be concluded that the samples obtained after eugenol addition can be used as biodiesel. DOI: http://dx.doi.org/10.17807/orbital.v10i1.1030

Highlights

Biodiesel is a recognized alternative fuel to the petroleum diesel due the potential to change the worldwide energy matrix and decrease the impact of fossil fuels on the environment
The most common composition includes mono-alkyl esters with longchain of fatty acids originated from vegetable oils or animal fats [1]
This paper aims to evaluate the efficiency of eugenol antioxidant on the oxidation stability of biodiesel synthesized from residual frying oil

Summary

Introduction

Biodiesel is a recognized alternative fuel to the petroleum diesel due the potential to change the worldwide energy matrix and decrease the impact of fossil fuels on the environment. The most currently employed conversion process of fatty acids in biodiesel is the transesterification with short chain alcohols catalyzed by strong basis, such sodium or potassium hydroxides [2,3,4,5]. At this moment, this fuel type only can be used in diesel engines mixed with diesel in volumetric proportion from 7 to up to 20% [6, 7]. The addition of antioxidant agent can be attractive to decrease the degradation process of diesel-biodiesel blends [8,9,10]

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