In the case of methyl linoleate (C18:2) and ricinoleate (C18:1-OH), their yields suffered a constant increase with the reaction time for temperatures below 350 and 325 C, respectively. Nevertheless, the yield of C18:2 passed through a maximum of 5.33% after 30 min at 350 C and then decreased to 3.21% after 90 min, while that of C18:1-OH reached a maximum of 51.71% after 30 min at 325 C and then decreased to 19.95% after 90 min