| http://www.w3.org/ns/prov#value | - Almost all biodiesel has been produced using the base-catalyzed technique as it requires only low temperatures and pressures and produces over 98% conversion yield (provided the starting oil is low in moisture and free fatty acids). [0248] Transesterification has also been carried out, as discussed above, using an enzyme, such as a lipase instead of a base.
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