| dc.description.abstract | This research has beendone by adding Calcium Oxide (CaO) as an azeotropic point breaker of ethanol-water. The Calcium Oxide used was analyzed with SEM-EDX which, showed that the constituent atoms of Calcium Oxide consisted of C by 37.59%, Ca by 35.90% and Oby 19.34%. where Calcium Oxide will bind water then h,o ld it
and separctte water with ethanol during the distillation process and reduce the boiling point of bioethanol from 78 ° C to 72 ° C. Bioethanol that has been purified with
Calcium Oxide is.further analyzed with FT-JR, GCMS and RON test. From the results of FT-IR analysis, bioethanol before the addition of CaO has absorption peak characteristics at wavenumber 3317.33; 2907.32; 2884.95; 1416.38; 1379.11; and 1043.65 cm- 1 which respectively indicate the presence of functional groups -OH
(V s1re1ching),C-H(V s1retchi11g asy111 ) (C H3), C-H(Vstretching sy111) ( CH3), C-H sp3 (V bending), C-H
sp3 (Vbe,ulnig), and C-O(Vs,retching). After the addition of Calcium Oxide there was a decrease in the absorption intensity of the OH group at wavenumber 3317.33 cm-1 This is also supported by the decrease in the octane number of bioethanol from 120 to
109 because the air and water content in bioethanol beco,me s much reduced. Bioethanol after the addition of CaO also has a higher solubility with pertalite than the initial bioethanol, this is due to its smaller density difference compared to the initial bioethanol, after the addition of Calcium Oxide (CaO) bioethanol has a purity of 100% after going through azeotrope distillation. | en_US |
