Yield is defined as weight of biodiesel/weight of feedstock. Biodiesel may contain various amounts of fatty acid esters. The feedstock may contain different amounts of pulp. Therefore yield is useless to compare.Тhe most important standard is ester content into biodiesel. According to EN 14103 standard, ester content is 96.5 min.
Сonversion efficiency is yield of esters in the esterification reaction as compared with the theoretical.
Ester content into biodiesel is a preferable parameter.