D.S. Fardhyanti, A. Damayanti, N.A.C. Imani, A. Mulyaningtyas, N.K. Setyawidianingsih, A.L. Andhini
Coffee shell is an agricultural waste with high lignocellulose content which potentially produces bio-oil as an environmentally alternative fuel. Bio-oil was produced from agricultural waste (biomass) using pyrolysis process that was carried out at 700°C and 1 atm. Bio-oil contains about 28.4% of caffeine, an alkaloid compounds that contains nitrogen atoms from primary metabolites of amino acids. It formed gum in the fuel oil and caused the engine damaged. Separation of phenolic compound from bio-oil was done by liquid-liquid extraction using chloroform and n-hexane as a solvent for 10, 30, 50 minutes at 30°C and stirring speed 250 rpm with feed-solvent ratio 1:4, 1:6, 1:8. The phenolic compound in the extract and raffinate phase were analyzed using UV-Vis spectrophotometer. The aim of this research is to obtain the effect of solvent, time of extraction process and feed-solvent ratio on the yield of phenolic compound. The result showed that the highest yield is 77.93% which were obtained using chloroform as solvent for 50 minutes extraction process with feed-solvent ratio of 1:8. © Published under licence by IOP Publishing Ltd.
Chemical Engineering Department, Engineering Faculty, Universitas Negeri Semarang, Indonesia; Chemical Engineering Department, Engineering Faculty, Universitas Muhammadiyah Surakarta, Indonesia
