Produção de biodiesel através de transesterificação in situ de sementes de girassol via catálise homogênea e heterogênea

Abstract

BIODIESEL PRODUCTION BY IN SITUTRANSESTERIFICATION OF SUNFLOWER SEEDS BY HOMOGENEOUS AND HETEROGENEOUS CATALYSIS. The objective of this work is to show the results of the in situtransesterification of sunflower seed oil with methanol on basic homogeneous and heterogeneous catalysis for the production of biodiesel. In homogeneous catalysis, the activity of KOH and K 2CO3 were evaluated using the same oil:methanol ratio of 1:90. KOH showed to be more active than K2CO3, leading to total conversion in biodiesel after 1h reaction time. In the heterogeneous catalysis the activity of K 2CO3 /Al 2O3 was comparable to the activity of K 2CO3 bulk: 53.0 and 66.6% resp. The properties of samples of biodiesel produced by homogeneous and heterogeneous catalysis were evaluated and are in accordance with the recommended fuel properties.