Environment-Congenial Biodiesel Production from Non-Edible Neem Oil

다국어 초록 (Multilingual Abstract)

In developing countries like India, where edible oils are in short supply, the contribution of non-edible oils like neem as a source for biodiesel production will be of great importance in the coming days. Biodiesel was produced from non-edible neem oil having a free fatty acid content of 19% in a two-step process, as free fatty acid of more than 1% in the feedstock adversely affects the single step alkali catalyzed transesterification process by soap formation. The first step of acid catalysed esterification reduced the free fatty acid content of neem oil to below 1%. The optimum combinations of parameters for pretreatment were found to be 0.60 volume by volume (v/v) methanol-to-oil ratio, 1% v/v H2SO4 acid catalyst and 1 hr reaction time. The next base catalysed transesterification process converted the pretreated oil to neem biodiesel. The optimum combination of parameters for transesterification was found to be 0.24 v/v methanolto-oil ratio, 1.08% weight by volume (w/v) catalyst concentration and 34 min reaction time. This two-step process gave an average yield of 90%. The fuel properties of neem biodiesel were found to be comparable to those of diesel, and conform to the latest American Standards for Testing of Materials Standards.

참고문헌 (Reference)

1 Mathur HB, "Utilization of non-edible wild oils as diesel engine fuels" 198-202, 1985

2 Ma F, "The effect of mixing on transesterification of beef tallow" 69 : 289-293, 1999

3 Karmakar A, "Properties of various plants and animals feedstocks for biodiesel production" 101 : 7201-7210, 2010

4 Narwal SS, "Neem in sustainable agriculture" Scientific Publishers 2003

5 Boocock DG, "Fast one-phase oilrich processes for the preparation of vegetable oil methyl esters" 11 : 43-50, 1996

6 Raheman H, "Diesel engine emissions and performance from blends of karanja methyl ester and diesel" 27 : 393-397, 2004

7 The Core Writing Team, "Climate change 2007: synthesis report. Contribution of Working Groups I, II and III to the fourth assessment report of the Intergovernmental Panel on Climate Change [Internet]" Intergovernmental Panel on Climate Change

8 Veljkovic VB, "Biodiesel production from tobacco (Nicotiana tabacum L.) seed oil with a high content of free fatty acids" 85 : 2671-2675, 2006

9 Canakci M, "Biodiesel production from oils and fats with high free fatty acids" 44 : 1429-1436, 2001

10 Karmakar A, "Biodiesel production from neem towards feedstock diversification: Indian perspective" 16 : 1050-1060, 2012

11 Ghadge SV, "Biodiesel production from mahua (Madhuca indica) oil having high free fatty acids" 28 : 601-605, 2005

12 Kumar Tiwari A, "Biodiesel production from jatrophaoil (Jatropha curcas) with high free fatty acids: an optimized process" 31 : 569-575, 2007

13 Ramadhas AS, "Biodiesel production from high FFA rubber seed oil" 84 : 335-340, 2005

14 Berchmans HJ, "Biodiesel production from crude Jatropha curcas L. seed oil with a high content of free fatty acids" 99 : 1716-1721, 2008

15 American Standards for Testing of Materials (ASTM), "ASTM standards and test methods (D189-01, D240-02, D4052-96, D445-03, D482-74, D5555-95, D6751-02, D93-02a, D95-990, and D97-02)"