Pemurnian Bioetanol Fuel Grade Menggunakan Metode Distilasi-Ekstraksi Menggunakan Pelarut Dietilen Glikol

Abstrak

ABSTRAK
Penelitian ini bertujuan untuk mengetahui pengaruh perbandingan volum pelarut dietilen glikol terhadap volum larutan etanol-air pada besarnya konsentrasi etanol yang dihasilkan melalui proses ekstraksi cair-cair yang sebelumnya dilakukan proses distilasi azeotrop dengan umpan larutan etanol 20%. Berdasarkan hasil penelitian, semakin besar perbandingan pelarut dietilen glikol terhadap larutan etanol-air (1:1-5:1v/v) pada proses pemurnian ekstraksi akan menghasilkan konsentrasi etanol semakin tinggi (99-99%v/v) dan hasil terbaik yang dihasilkan masuk ke dalam kategori etanol fuelgrade (99,84%v/v).

ABSTRACT
This study aims to purify 20% ethanol into fuel grade ethanol >99.5% by using the azeotropic distillation and extraction process to determine the effect of the ratio of solvent volume of ethylene glycol to the volume of ethanol-water solution on the magnitude of ethanol concentration produced through the liquid-liquid extraction process. The 20% ethanol feed was neutralized by using two stages to a concentration of 94%v/v. this resulting concentration became a feed for the extraction process using diethylene glycol. The ratio of volume of diethylene glycol in the extraction process used is 1:1, 1:2, 1:3, 1:4, 1:5 (v/v). The greater the ratio of the solvent diethylene glycol to the ethanol-aqueous solution (1;1-5;1v/v) in the extraction purification process, the higher the ethanol concentration (99-99%v/v) and the best resulted goes into the expiry of the fuelgrade ethanol category (99.84%v/v).Keywords: Bioethanol, extraction, diethylene glycol