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Synthesis of economically viable biodiesel from waste frying oils (WFO)

Authors

  • Yogesh C. Sharma,

    Corresponding author
    1. Department of Applied Chemistry, Institute of Technology, Banaras Hindu University,Varanasi, 221 005, India
    • Department of Applied Chemistry, Institute of Technology, Banaras Hindu University,Varanasi, 221 005, India.
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  • Shweta Agrawal,

    1. Department of Applied Chemistry, Institute of Technology, Banaras Hindu University,Varanasi, 221 005, India
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  • Bhaskar Singh,

    1. Department of Applied Chemistry, Institute of Technology, Banaras Hindu University,Varanasi, 221 005, India
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  • Amado Enrique Navarro Frómeta

    1. Universidad Tecnológica de Izúcar de Matamoros, Prolongación Reforma 168, Barrio Santiago Mihuacán Izúcar de Matamoros, Puebla, CP 74420, Mexico
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Abstract

In present communication, waste frying oil (WFO) has been used as a feedstock for biodiesel synthesis. WFO, procured from a local Indian restaurant possessed an acid value of 0.84 mg KOH/g, which is low enough for single step transesterification reaction. Biodiesel (fatty acid methyl esters) was washed after transesterification reaction and the yield got lowered substantially (from 96% to 86.36%) after water washing owing to loss of esters. 30:100 vol% (methanol to oil), 0.6 wt% NaOCH3, 60°C temperature and 600 rpm agitation in 1 h reaction time was found to be optimum for transesterification reaction. 1H NMR spectrum showed a high conversion (95.19%) of fatty acids in WFO to biodiesel in 2 h reaction time. Almost complete conversion (99.68%) was attained in 2 h reaction time. © 2011 Canadian Society for Chemical Engineering

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