The pyrolysis of medlar seeds was performed at 350, 450, 550, and 650 °C with without K2CO3, MgO, expanded perlite (10 wt%). maximum dichloromethane extract yield (6.70 wt%) obtained 450 in the experiments catalyst, while bio-oil (50.3 presence perlite. yields decreased noticeably use MgO K2CO3. bio-oils from non-catalytic runs mainly consisted phenolic compounds. catalysts had a noticeable eff...