Effects of Lignins on Antioxidant Biodiesel Production in Supercritical Methanol

摘要

Biodiesel is gradually gaining acceptance in the market as an environmentally friendly alternative diesel fuel. However, poor oxidative stability of biodiesel is a significant problem associated with the commercial application. Oxidation instability can lead to the formation of undesirable oxidation products, such as aldehydes, alcohols, shorter chain carboxylic acids, insolubles, gum, and sediment in the biodiesel. The most promising approach for improving oxidative stability of biodiesel is treatment with antioxidants because it facilitates the use of existing storage tanks and fuel-handling systems without requiring upgrades or redesign.3 However, adding conventional antioxidants means increased cost, because the commercial antioxidants are costly chemicals.