Abstract
The aim of this study was to analyze the catalytic performance of natural dolomitic rock as an environmentally friendly catalyst in the reaction of Jatropha Curcas oil with methanol under microwave-assisted transesterification. The dolomite was utilized as a source of calcium oxide (CaO) and magnesium oxide (MgO). The main characteristic of this rock is the high content of CaMg(CO3)2 which was transformed into CaO·MgO mixed oxide by calcination. The activation method to improve the activity, basicity and stability of catalyst has been investigated. The catalyst was characterized by X-ray diffraction (XRD), scanning electron microscope (SEM) and nitrogen adsorption/desorption (BET) method. The effects of reaction variables such as reaction time, methanol/oil molar ratio, and catalyst loading on the yield of biodiesel were investigated. The results indicated that the developed catalyst could also be reused feasibly up to three consecutive cycles. Overall, the potential of this low-cost heterogeneous base catalyst has been demonstrated for transesterification applications.
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