Aneu, Aneu; Wijaya, Karna; Syoufian, Akhmad published the artcile< Porous silica modification with sulfuric acids and potassium fluorides as catalysts for biodiesel conversion from waste cooking oils>, COA of Formula: C19H34O2, the main research area is potassium fluoride sulfuric acid biodiesel catalyst waste cooking oil.
Acid and base catalysts have been successfully synthesized, characterized, and applied. This research aimed to synthesize catalysts for biodiesel conversion from waste cooking oil. Acid catalyst (SO4/SiO2) was used to reduce the free fatty acid (FFA) from feedstock and base catalyst (KF/SiO2) was used to convert the oil into biodiesel. The catalyst was prepared using tetra-Et orthosilicate (TEOS) as a silica precursor. The heating source employed the conventional and microwave heating method. The microwave-assisted presented more efficient and reduced reaction time by up to 50% and showed a larger surface area of 556.4 m2/g. Porous silica was treated by the addition of sulfuric acids (H2SO4) as acid agents and potassium fluoride (KF) as base agents with various concentrations of 0.5; 1.0; 1.5; and 2.0 M. These catalysts were varied in calcination temperature at 450, 500, 550, and 600°C. The catalysts were analyzed and characterized by acidity and basicity anal., FTIR, XRD, SEM-EDX, and SAA. The SO4/SiO2 2.0-550 exhibited the highest acidity which was 0.97 mEq KOH/g. This catalyst was able to reduce the FFA content from 3.6% to 1.62% with 5% of catalyst weight, 1:23 ratio mol oil to methanol, and 60 min of reaction time. The optimum basicity was achieved by KF/SiO2 2.0-550 with the basicity of 1.64 mmol HCl/g and proved that KF/SiO2 2.0-550 had catalytic activity in biodiesel conversion. This catalyst was applied to convert the esterified WCO in the transesterification step. The biodiesel was analyzed using GCMS and obtained up to 54.13% of Me ester.
Journal of Porous Materials published new progress about Biodiesel fuel. 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, COA of Formula: C19H34O2.
Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics