Enzymatic transesterification is, therefore, an attractive method for biodiesel production over chemical methods because of the reduced feedstock limitations, downstream processing and environmental impact (
immobilization technology provides a number of important benefits including: (a) enzyme reuse, (b) easy of separation of product from enzyme and (c) the potential to run continuous processes via packed-bed reactors (Peilow and Misbah, 2001). In some cases, the activity and stability in terms of thermal, chemical and mechanical properties of the enzyme are, also, improved, thereby allowing their applications under harsher environmental conditions such as pH, temperature and organic solvents
Factors affecting enzymatic transestrification: There are several factors which affect the rate at which transesterification proceeds and the ultimate yield of biodiesel. These include: (a) selection of alcohol, (b) use of solvents, (c) lipase pretreatments, (d) alcohol to oil molar ratio, (e) water activity/content of the system and (f) reaction temperature
The acid and alkali Transesterification processes are energy intensive and require extensive downstream processin
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