Lipases in ionic liquids system for biodiesel production: A review
Room temperature ionic liquids (RTILs) are molten salts which are liquids at room temperature. Compared with traditional solvents, ionic liquids (ILs) have many advantages such as high chemical and thermal stability, low volatility and non-flammability. According to the literature, ILs have the ab...
| Main Authors: | , , , , |
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| Format: | Conference or Workshop Item |
| Language: | English |
| Published: |
Kulliyah of Engineering, International Islamic University Malaysia
2016
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| Subjects: | |
| Online Access: | http://irep.iium.edu.my/51678/ http://irep.iium.edu.my/51678/1/51678.pdf |
| Summary: | Room temperature ionic liquids (RTILs) are molten salts which are liquids at room temperature. Compared
with traditional solvents, ionic liquids (ILs) have many advantages such as high chemical and thermal
stability, low volatility and non-flammability. According to the literature, ILs have the ability to dissolve
many polymers. Moreover, it is feasible to design the physicochemical properties of an IL which extend their
scope. As greener solvent, IL-enzyme catalyzed relations have attracted considerable attention. Lipases are
one among the important enzymes in both industrial and pharmaceutical sectors that catalyze synthesis,
hydrolysis and transesterification of fatty acids esters. It has been shown that lipase is catalytically active in
hydrophobic ILs with hexafluorophosphate or bis(trifluoromethanesulfonyl) imide anions while the activity is
less in hydrophilic ILs with nitrate or acetate anions. Lipase is used in catalytic transesterification
triglycerides with an alcohol (usually methanol or ethanol) for production of biodiesel. Recently, the
enzymatic synthesis of biodiesel has been widely described an eco-friendly process, uses moderate conditions
and easier product recovery. However, the main drawback of this approach is the lipase inactivation by
alcohol due to its hydrophilic nature and leads to limited recycling operations. Due to their wide applications,
ILs have been reported as a medium for catalytic conversion of triglycerides to biodiesel. In this review, we
will highlight the recent research on employment of ILs-lipase as a system and its efficiency for biodiesel
production including the comparisons with other conventional methods. |
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