Open AccessOptimization of Waste Cooking Oil’s FFA as Biodiesel Feedstock
Author(s) -
Sri Rizki Putri Primandari,
Andril Arafat,
Harumi Veny
Publication year - 2021
Publication title -
teknomekanik
Language(s) - English
Resource type - Journals
eISSN - 2621-8720
pISSN - 1979-6102
DOI - 10.24036/teknomekanik.v4i1.9072
Subject(s) - response surface methodology , central composite design , biodiesel , methanol , biodiesel production , raw material , waste oil , irradiation , chemistry , design–expert , molar ratio , acid value , pulp and paper industry , materials science , waste management , nuclear chemistry , chromatography , organic chemistry , biochemistry , catalysis , engineering , physics , nuclear physics
Waste cooking oil has high Free Fatty Acid (FFA). It affected on decreasing a biodiesel production. FFA reduction is one of important processes in biodiesel production from waste cooking oil. Thus, this study aimed to examine the optimum condition in FFA reduction. The process is assisted by using ultrasonic irradiation on acid esterification. Variables of the process are acid concentration, molar ratio of methanol and oil, and irradiation time. Meanwhile temperature irradiation on 45oC is a control variable. Process optimization is conducted by Response Surface Methodology (RSM) with Central Composite Design (CCD). The optimum conditions of response were 7.22:1 (methanol to oil molar ratio), 0.92% wt H2SO4, 26.04 minutes (irradiation time), and 45oC (irradiation temperature). Ultrasonic system reduced FFA significantly compared to conventional method.