PENCAIRAN TONGKOL JAGUNG SECARA TERMOKIMIA DALAM ETANOL SUPERKRITIK

Bregas Siswo Tatag Sembodo, Ester Dwi Agustina Santoso, Firna Niwang Jati

Abstract

The use of corn cobs as the biomass feedstock offers promising possibilities for renewable energy production. Corn cobs can be converted into oil by thermochemical liquefaction in the supercritical ethanol. The aims of this research were to find the optimal temperature which produce the maximum yield of oil and the contained substances in the oil. In this research, 5 gram dry corn cob powder was put into 81 ml autoclave in addition of 0.25 gr sodium carbonate and 75 ml ethanol as solvent. After nitrogen was blown into autoclave, it was heated in the tube furnace until it reaches 75 minutes and maintained with the various temperature.The liquid product was distilled to separate oil and volatile matter, meanwhile the solid product was dried for 24 hours. The solid product was extracted with n-hexane to remove glucose. The composititions of oil was analyzed by using GC-MS. The experimental result showed that the maximum yield was 47.10 % when heating time 75 minute. The oil mostly contained esters from C-20 to lower. The main compound was hexadecanoic acid ethyl ester by 37.10 % weight and other consist of alkyl esters, phenols, alkanes, etc.

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DOI: https://doi.org/10.20961/ekuilibrium.v14i1.24812

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