Biodiesel recipe | Wikipedia audio article
Channel: wikipedia tts
Date: 2019-06-07

This is an audio version of the Wikipedia Article:
https://en.wikipedia.org/wiki/Biodiesel_production


00:00:57 1 Process steps
00:01:12 1.1 Feedstock pretreatment
00:02:25 1.2 Reactions
00:03:08 1.3 Product purification
00:03:57 2 Reactions
00:04:07 2.1 Transesterification
00:06:26 2.2 Base-catalysed transesterification mechanism
00:07:34 3 Production methods
00:07:44 3.1 Supercritical process
00:08:36 3.2 Ultra- and high-shear in-line and batch reactors
00:09:22 3.3 Ultrasonic reactor method
00:10:16 3.4 Lipase-catalyzed method
00:11:13 3.5 Volatile fatty acids from anaerobic digestion of waste streams
00:12:04 4 See also



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SUMMARY
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Biodiesel production is the process of producing the biofuel, biodiesel, through the chemical reactions of transesterification and esterification. This involves vegetable or animal fats and oils being reacted with short-chain alcohols (typically methanol or ethanol). The alcohols used should be of low molecular weight. Ethanol is the most used because of its low cost, however, greater conversions into biodiesel can be reached using methanol. Although the transesterification reaction can be catalyzed by either acids or bases, the base-catalyzed reaction is more common. This path has lower reaction times and catalyst cost than those  acid catalysis. However, alkaline catalysis has the disadvantage of high sensitivity to both water and free fatty acids present in the oils.