Influence of auxiliary fuel on the properties of alkaline mixed metal oxide catalyst fabricated by combustion method for biodiesel production
Volume Title: 1
1Chemical Engineering Department, Esfarayen University of Technology, Esfarayen, North Khorasan, Iran.
2Central Research Laboratory, Esfarayen University of Technology, Esfarayen, North Khorasan, Iran
The solution combustion method was utilized for the fabrication of the alkaline mixed metal oxide catalyst containing Ca and Al cations in which the fuel content was assessed by adding the auxiliary fuel, sorbitol, in the mixture. Then, the samples were impregnated by potassium ions to increase their activity in the transesterification reaction. The results revealed that adding an auxiliary fuel increased the combustion reaction temperature and duration such that the crystallinity, external porosity and thermal stability of the sample (KOH/Ca12Al14O33) were enhanced. Moreover, due to the reduction the amorphous structure of the support, the well-bonding between K ions with the surface of support increased, and the activity was increased, consequently. The sample fabricated by the high amount of sorbitol converted more than 91% of canola oil to biodiesel at the conditions of 450 W of microwave power, 12 molar ratio of methanol-to-oil, 4 weight percent of catalyst and 60 min reaction time. The results present that the combustion method is an efficient and fast method for the fabrication of the nanosized catalyst with high activity in which the optimization of the fuel is very important. Moreover, the catalyst can consider as a suitable choice for industrial application
Alkaline catalyst; Mixed metal oxide; Solution combustion method; Sorbitol; Transesterification; biodiesel