Omega -3 fatty acids
Abbreviations
Description
Represents a family of polyunsaturated fatty acids characterized by the presence of a double bond three atoms away from the terminal methyl group in their chemical structure. Key omega -3 fatty acids include alpha-linolenic acid (ALA, C18:3), eicosapentaenoic acid (EPA, C20:5), and docosahexaenoic acid (DHA, C22:6).
Nutritional potential:
Omega -3 fatty acids are essential fats that the body cannot produce on its own (specifically ALA, from which EPA and DHA are synthesized in limited amounts). They are highly renowned for their anti-inflammatory properties and cardiovascular benefits, including lowering blood triglycerides, reducing blood pressure, and decreasing the risk of arrhythmias and plaque buildup in arteries. They are also critical for brain health, cognitive function, and fetal development.
Biodiesel potential:
Due to their high degree of polyunsaturation, omega -3 fatty acids present significant challenges for biodiesel production. While they drastically improve cold-weather performance by lowering the cold filter plugging point (CFPP), their multiple double bonds make them extremely susceptible to rapid oxidation, degradation, and polymerization (very poor oxidation stability, OS). Furthermore, they significantly lower the cetane number (CN), leading to poor ignition quality. Therefore, feedstocks with high omega -3 content (like fish oil or linseed oil) are generally less desirable or require blending and antioxidant treatments for standard biodiesel use.