ANALISIS PENGARUH HIDROLISIS KONDISI SUB KRITIS AIR TERHADAP KANDUNGAN ASAM LEMAK BEBAS PADA PRODUKSI BIODIESEL DENGAN METODE METANOL SUPERKRITIS
ABSTRACT: Biodiesel is an
alternative fuel with a fatty acid ester composition made from raw vegetable
oils/animal that has characteristics similar to diesel oil. High quality
biodiesel fuel from oil/fat had been processed by two-stage supercritical
metanol method which consisted of the hydrolysis process by mixing oil and
water in sub-critical conditions that generated free fatty acids and glycerol,
followed by esterification process that mixed free fatty acids with methanol in
supercritical methanol conditions. In
this research, hydrolysis of frying oil at sub-critical conditions had been
conducted in various conditions. The conditions were the ration of oil to water
and hydrolysis time in the reactor chamber at sub-critical condition. Materials
used in this research were commercial frying cooking oil and bottled
water. The purpose of this study was to
find out the effect of hydrolysis at sub-critical condition on free fatty acids
content generated in the production of biodiesel using super critical
methanol. The results showed that there
was an increasing percentage of ALB in the hydrolysis reaction with
sub-critical water conditions. The highest and significant ALB was 67.10% that
obtained in ratio of water to oil 25:75 and holding time of 20 minutes. Fatty
acid produced in super-critical reactor was solid at room temperature and the
behavior of this product still required a thermal analysis for designing
exhausting pipe from the reactor in order to prevent blockage.
Keywords: Biodiesel,
hydrolysis, sub-critical, free fatty acids
Penulis: Bambang Dwi Argo,
Budi Swastomo
Kode Jurnal: jppertaniandd100031
