Abstract:
:Fatty acid methyl esters (FAME) were produced from edible, non-edible and used cooking oils with different fatty acid contents by transesterification with methanol using calcined layered double hydroxides (LDHs) as solid base catalysts. Among the catalysts, calcined CaAl2-LDH (hydrocalumite) showed the highest activity with >90% yield of FAME using low methanol:oil molar ratio (<6:1) at 65 °C in 5 h. The activity of the catalyst was attributed to its high basicity as supported by Hammett studies and CO(2)-TPD measurements. The catalyst was successfully reused in up to four cycles. Some of the properties such as density, viscosity, neutralization number and glycerol content of the obtained biodiesel matched well with the standard DIN values. It is concluded that a scalable heterogeneously catalyzed process for production of biodiesel in high yields from a wide variety of triglyceride oils including used oils is possible using optimized conditions.
journal_name
Bioresour Technoljournal_title
Bioresource technologyauthors
Sankaranarayanan S,Antonyraj CA,Kannan Sdoi
10.1016/j.biortech.2012.01.022subject
Has Abstractpub_date
2012-04-01 00:00:00pages
57-62eissn
0960-8524issn
1873-2976pii
S0960-8524(12)00028-4journal_volume
109pub_type
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