Use of Mg-Al/hydrotalcite Catalyst in Biodiesel Production from Avocado Seed Oils: A Preliminary Study

Abstract

Biodiesel production of avocado seed oils has been carried out using the heterogeneous catalyst of Mg-Al/hydrotalcite. Transesterification process was conducted by varying temperature reaction and oil-methanol molar ratio. The reaction temperature was 30, 40, 50, and 60°C, whereas the oil-methanol molar ratio was 1:3, 1:6, 1:9, and 1:12, respectively. As-synthesized Mg-Al/hydrotalcite catalyst was characterized using X-ray diffraction and FTIR. Meanwhile, the biodiesel was analyzed their density, viscosity, water content and 1H-NMR analysis. The results showed that optimum condition in biodiesel production was oil-methanol molar ratio of 1:6 at a reaction temperature of 60°C for 60 minutes and catalyst quantity of 2% yielding biodiesel conversion percentage was approximately 15.90%. However, this preliminary findings showed that Mg-Al/hydrotalcite was able to convert the avocado seed oils into biodiesel even if still need further analysis and research so that produces a higher percentage of biodiesel conversion.

Solvent-Free Synthesis and Characterization of Bimetallic UiO-66(Zr/Sn) Heterogeneous Catalyst for Biodiesel Production

“…Particularly, if raw materials have an abundance of free fatty acids, the utilization of heterogeneous catalysts will be beneficial since they can avoid saponification. Actually, several types of heterogeneous catalysts such as ion-exchange resins, alkoxides, , Mg–Al hydrotalcites, − metal oxides and hydroxides, − carbon-based solid acids, and heteropoly acids , have been attempted for biodiesel production. However, the catalytic efficiency of these materials is greatly inhibited primarily by reason of their low surface area and pore volume. , …”

Super rapid preparation of biodiesel over highly dispersed K2CO3 supported by LDH

“…6 For the transesterification of palm oil with methanol, KF/Ca-Mg-Al hydrotalcite was utilized as a solid base catalyst, which displayed significant catalytic activity by delivering an oil conversion rate of 90% at a methanol/oil molar ratio of 12:1, reaction temperature of 338 K, and reaction 10 min. 7 However, high reaction temperature causes evaporation of methanol and consumes large energy, 8 and the conversion rate is not so high.…”

Solvent-free synthesis and characterization of bimetallic UiO-66(Zr/Sn) heterogeneous catalyst for biodiesel production

“…Different heterogeneous catalysts such as ion-exchange resins [7], alkoxides [8,9], Mg-Al hydrotalcites [10][11][12], metal oxides and hydroxides [13][14][15][16], carbon-based solid acids [17], and heteropolyacids [18,19] have been applied. However, the above-mentioned materials generally possess low surface area and suffered from recovery problem [20,21].…”