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      Recent Strategy of Biodiesel Production from Waste Cooking Oil and Process Influencing Parameters: A Review

      , , , ,
      Journal of Energy
      Hindawi Limited

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          Abstract

          Cost of biodiesel produced from virgin vegetable oil through transesterification is higher than that of fossil fuel, because of high raw material cost. To minimize the biofuel cost, in recent days waste cooking oil was used as feedstock. Catalysts used in this process are usually acids, base, and lipase. Since lipase catalysts are much expensive, the usage of lipase in biodiesel production is limited. In most cases, NaOH is used as alkaline catalyst, because of its low cost and higher reaction rate. In the case of waste cooking oil containing high percentage of free fatty acid, alkaline catalyst reacts with free fatty acid and forms soap by saponification reaction. Also, it reduces the biodiesel conversions. In order to reduce the level of fatty acid content, waste cooking oil is pretreated with acid catalyst to undergo esterification reaction, which also requires high operating conditions. In this review paper, various parameters influencing the process of biofuel production such as reaction rate, catalyst concentration, temperature, stirrer speed, catalyst type, alcohol used, alcohol to oil ratio, free fatty acid content, and water content have been summarized.

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          Most cited references52

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          A review on biodiesel production using catalyzed transesterification

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            Variables affecting the yields of fatty esters from transesterified vegetable oils

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              Biodiesel processing and production

              Jon Gerpen (2005)
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                Author and article information

                Journal
                Journal of Energy
                Journal of Energy
                Hindawi Limited
                2314-615X
                2013
                2013
                : 2013
                :
                : 1-10
                Article
                10.1155/2013/926392
                fdbe39b5-1e3e-415f-98f4-8c8eefa139a1
                © 2013

                http://creativecommons.org/licenses/by/3.0/

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