REFERENCES
- Abdu-Khader , M. M and Speight , J. G. 2004 . The concepts of energy, environment, and cost for process Design . International Journal of Green Energy , 1 : 137 – 51 .
- AOCS . 1997 . AOCS official method Ca 5a-40: Free fatty acids , 5th , Champaign , IL : American Oil Chemists’ Society Press . American Oil Chemists’ Societyed.
- Canakci , M. 2007 . The potential of restaurant waste lipids as biodiesel feedstocks . Bioresource Technology , 98 : 183 – 90 .
- Canakci , M. and Van Gerpen , J. 2001 . Biodiesel production from oils and fats with high free fatty acids . Transactions of the ASAE , 44 : 1429 – 36 .
- Chongkhong , S. , Tongurai , C. , Chetpattananondh , P. and Bunyaka , C. 2007 . Biodiesel production by esterification of palm oil fatty acid distillate . Biomass and Bioenergy , 31 : 563 – 68 .
- Chuah , T. G. , Azlina , A. G. K. Wan , Robiah , Y. and Omar , R. 2006 . Biomass as the renewable energy sources in Malaysia: An overview . International Journal of Green Energy , 3 : 323 – 46 .
- Demirbas , A. 2007 . Recent developments in biodiesel fuels . International Journal of Green Energy , 4 : 15 – 26 .
- Demirbas , A. 2008 . Biodiesel: A realistic fuel alternative for diesel engines , London : Springer .
- Demirbas , A. 2009 . Green energy and technology , London : Springer .
- Do , L. D. , Singh , V. , Chen , L. , Kibbey , T. C. G. , Gollahalli , S. R. and Sabatini , D. A. 2011 . Algae, canola, or palm oils-diesel microemulsion fuels: Phase behaviors, viscosity, and combustion properties . International Journal of Green Energy , 8 : 748 – 67 .
- Elsheikh , Y. A. , Man , Z. , Bustam , M. A. , Yusup , S. and Wilfred , C. D. 2011 . Brønsted imidazolium ionic liquids: Synthesis and comparison of their catalytic activities as pre-catalyst for biodiesel production through two stage process . Energy Conversion and Management , 52 : 804 – 09 .
- Ghadge , S. V. and Raheman , H. 2005 . Biodiesel production from mahua (Madhuca indica) oil having high free fatty acids . Biomass and Bioenergy , 28:601--05
- Hayyan , A. , Md , Z. , Alam , M. E. S , Mirghani , N. A , Kabbashi , N. I. N. M , Hakimi , Y. M , Siran , S. and Tahiruddin . 2010 . Sludge palm oil as a renewable raw material for biodiesel production by two-step processes . Bioresource Technology , 101 : 7804 – 11 .
- Hayyan , A. , Md , Z. , Alam , M. E. S , Mirghani , N. A , Kabbashi , N. I. N. M , Hakimi , Y. M , Siran , S. and Tahiruddin . 2011 . Reduction of high content of free fatty acid in sludge palm oil via acid catalyst for biodiesel production . Fuel Processing Technology , 92 : 920 – 24 .
- Hayyan , A., F. S. , Mjalli , M. A , Hashim , M. , Hayyan , I. M , AlNashef , S. and Al-Zahrani . 2012 . Palm oil acidity treatment for fatty acid methyl ester production . Chemical Papers , 66 : 39 – 46 .
- Hayyan , A. , Mjalli , F. S , Hashim , M. A , Hayyan , M , AlNashef , I. M , Al-Zahrani , S and Al-Saadi , M. A . 2011 . Ethanesulfonic acid-based esterification of industrial acidic crude palm oil for biodiesel production . Bioresource Technology , 102:9564−70
- Hayyan , M. , Mjalli , M F. S. , Hashim , M. A. and AlNashef , I. M. 2010 . A novel technique for separating glycerine from palm oil-based biodiesel using ionic liquids . Fuel Processing Technology , 91 : 116 – 20 .
- Leung , D. Y. C. and Guo , Y. 2006 . Transesterification of neat and used frying oil: Optimization for biodiesel production . Fuel Processing Technology , 87 : 883 – 90 .
- Liu , K. 1994 . Preparation of fatty acid methyl esters for gas-chromatographic analysis of lipids in biological materials . Journal of the American Oil Chemists’ Society , 71 : 1179 – 87 .
- Ma , F. and Hanna , M. A. 1999 . Biodiesel production: A review . Bioresource Technology , 70 : 1 – 15 .
- Meher , L. C. , Kulkarni , M. G. , Dalai , A. K. and Naik , S. N. 2006 . Transesterification of karanja (Pongamia pinnata) oil by solid basic catalysts . European Journal of Lipid Science and Technology , 108:389--97
- Serin , H. , Ozcanli , M. , Gokce , M. K. and Tuccar , G. 2012 . Biodiesel production from tea seed (Camellia sinensis) oil and its blends with diesel fuel . International Journal of Green Energy , 10:370--77
- Vedaraman , N. , Puhan , S. , Nagarajan , G. and Velappan , K. C. 2011 . Preparation of palm oil biodiesel and effect of various additives on NOx emission reduction in B20: An experimental study . International Journal of Green Energy , 8 : 383 – 97 .
- Veljkovic , V. B. , Lakicevic , S. H. , Stamenkovic , O. S. , Todorovic , Z. B. and Lazic , M. L. 2006 . Biodiesel production from tobacco (Nicotiana tabacum L.) seed oil with a high content of free fatty acids . Fuel , 85 : 2671 – 75 .
- Wang , W. G. , Lyons , D. W. , Clark , N. N. , Gautam , M. and Norton , P. M. 2000 . Emissions from nine heavy trucks fueled by diesel and biodiesel blend without engine modification . Environmental Science and Technology , 34 : 933 – 39 .
- Wang , Y. , Ou , S. , Liu , P. and Zhang , Z. 2007 . Preparation of biodiesel from waste cooking oil via two-step catalyzed process . Energy Conversion and Management , 48:184--88
- Zhang , J. , Wang , X. , Guo , H. , Liu , S. and Ma , J. 2011 . Synthesis and properties of a novel ethylene glycol monobutyl ether palm oil monoester biofuel . International Journal of Green Energy , 9 : 573 – 83 .