synthesis and comparative study of biodiesels from the nine different edible and non-edible vegetable oils

Decreasing reserves of fossil fuels and environmental concerns like greenhouse gases have brought increasing studies into renewable and low-carbon sources of energy. biodiesel is arenewable and sustainable replacement for crude oil that has become increasingly important as the world’s supply of petroleum decreases, and it is vitally important to conduct research on new feedstocks with high efficiency, competitive pricing, and ease of manufacture. herein we reported nine different biodiesels that were produced from the nine common vegetable oils of coconut oil, sesame oil, poppy oil, castor oil, bitter almond oil, olive oil, black seed oil, peanut oil, and pecan oil. the yields of the produced biodiesels are in the range of 50 to 98%, and the density and flashpoints of the produced biodiesels were in the ranges of 0.85 to 0.99 (g/cm3) and 150 to 222°c. moreover, compositions of the produced biodiesels were analyzed by gc and the concentrations of the main fatty acid methyl esters (fame) were reported and compared. lauric acid methyl ester, oleic acid methyl ester, linoleic acid methyl ester, ricinoleicacid methyl ester, and stearic acid methyl ester are the main components of the produced biodiesels.