DEKOMPOSISI TONGKOL JAGUNG SECARA TERMOKIMIA DALAM ETANOL PANAS BERTEKANAN

Bregas S T Sembodo, Diah Kartika Puspita Sari, Gemma Cintya Binajit

Abstract

Corn cobs can be converted into oil by thermochemical liquefaction in the hot compressed ethanol. The aim of this research was to find the optimal temperature which producesmaximum yield of oil and the contained substances in the oil.A 100 ml cylindrical autoclave used in the experiment was loaded with 5 g of dry powdered corncob, 0.25 g of sodium carbonate and 65 ml of ethanol 96%. After nitrogen was blown into autoclave, it was heated in the tube furnace until the desired temperature and kept at this temperature for 75 minutes. The reaction temperature range in this research was 260 – 400 oC. The product was filtered and the filtrate was distillated to obtain oil, meanwhile the solid product was dried for 24 hours. The produced oil was extracted with n-hexane to remove glucose and then the compositions of oil was analyzed by GC-MS method. Theresults showed that the maximum yield was 16.78% at reaction temperature of 280 oC.The oil mostly contained esters from C-20 to lower. The main compound was ethyl oleateby 47.9% by weight.

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References

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DOI: https://doi.org/10.20961/ekuilibrium.v10i2.49636

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