Indian Journal of Science and Technology

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Optimization of Biodiesel Production from Oils and Fats with High Free Fatty Acids


Affiliations
1 Dept. of Mechanical Engineering, Jawaharlal Nehru Technological University, Hyderabad-500085, India
2 Dept of Mechanical Engineering, Jawaharlal Nehru Technological University, Hyderabad-500085, India
3 Kuppam College of Engineering, Kuppam -517425 (AP), India
 

Biodiesel may be cost effective if produced from low cost feedstock such as animal fats, restaurant waste oil and frying oil, which contains high amount of free fatty acids (FFA). In the present work, two-stage transesterification process was used to convert a mixture of 75% restaurant waste oil and 25% pig fat oil (PFO) into restaurant waste oil pig fat methyl ester (RWOPFME). Different amounts of methanol (25, 30, 35, 40, 45 and 50% by vol.), alkaline catalyst (NaOH) concentrations (0.3, 0.5, 0.7, and 0.9% by wt.), reaction temperature (55°C, 60°C and 65°C) and reaction time (90, 120 and 150 min) were selected for the transesterification process in order to optimize the experimental conditions for maximum biodiesel yield. Amount of H2SO4 (1.5 ml) was kept constant. Maximum yield (80% by vol.) at optimized process parameters such as methanol (40%), NaOH (0.3 g), reaction temperature (65°C), reaction time (90 min) and H2SO4 (1.5 ml) was obtained.
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  • Cankci M and VanGerpen J (2001) Biodiesel production from oils and fats with high free fatty acids, Transaction of ASAE. 44(6), 1429-1436.

  • Cankci M and Van Gerpen (1999) Biodiesel production via acid catalyst. Trans. ASAE. 42(5), 1203-1210.

  • Cigizoglu KB, Ozaktas T and Karaosmanoglu F (1997) Used sunflower oil as an alternative fuel for diesel engines. Energy Sources.19, 559-556.

  • Freedman B, Pyrde EH and Mounts TL (1984) Variables affecting the yields of fatty esters from transesterified vegetable oils. JAOCS. 61,1638-1643.

  • Jeromin L, Peukert E and Wollmann G (1987) Process for the pre-esterification of free fatty acids in fats and oils. US Patent, 4698186.

  • Laguë CM, Lo KV and Staley LM (1988) Waste vegetable oil as a diesel fuel extender. Can. Agri. Engg. 30(1), 27-32.

  • Leung DY and Guo Y (2006) Transesterification of neat & used frying oil: optimization for biodiesel production. Fuel proc. technol. 87, 883-890.

  • Ma F, Clements LD and Hanna MA (1998) The effects of catalyst, fatty acids and water on transesterification of beef tallow. Trans. ASAE. 41, 1261-1264.

  • Math MC and Irfan G (2007) Optimization of restaurant waste oil methyl ester yield. J. Sci. Ind. Res. 66,,772-776.

  • Mittelbach M, Porkits B and Silberholz (1992) Production and fuel properties of fatty acid methyl esters from used frying oil. Proc. Alternative Energy


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PDF Views: 190




  • Optimization of Biodiesel Production from Oils and Fats with High Free Fatty Acids

Abstract Views: 466  |  PDF Views: 190

Authors

M. C. Math
Dept. of Mechanical Engineering, Jawaharlal Nehru Technological University, Hyderabad-500085, India
Sudheer Prem Kumar
Dept of Mechanical Engineering, Jawaharlal Nehru Technological University, Hyderabad-500085, India
Soma V. Chetty
Kuppam College of Engineering, Kuppam -517425 (AP), India

Abstract


Biodiesel may be cost effective if produced from low cost feedstock such as animal fats, restaurant waste oil and frying oil, which contains high amount of free fatty acids (FFA). In the present work, two-stage transesterification process was used to convert a mixture of 75% restaurant waste oil and 25% pig fat oil (PFO) into restaurant waste oil pig fat methyl ester (RWOPFME). Different amounts of methanol (25, 30, 35, 40, 45 and 50% by vol.), alkaline catalyst (NaOH) concentrations (0.3, 0.5, 0.7, and 0.9% by wt.), reaction temperature (55°C, 60°C and 65°C) and reaction time (90, 120 and 150 min) were selected for the transesterification process in order to optimize the experimental conditions for maximum biodiesel yield. Amount of H2SO4 (1.5 ml) was kept constant. Maximum yield (80% by vol.) at optimized process parameters such as methanol (40%), NaOH (0.3 g), reaction temperature (65°C), reaction time (90 min) and H2SO4 (1.5 ml) was obtained.

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DOI: https://doi.org/10.17485/ijst%2F2010%2Fv3i3%2F29707