lee, jae hun
[Verfasser:in]
;
Jeon, Harim
[Sonstige Person, Familie und Körperschaft];
Park, Jung Tae
[Sonstige Person, Familie und Körperschaft];
Kim, Jong Hak
[Sonstige Person, Familie und Körperschaft]
Synthesis of Hierarchical Flower-Shaped Hollow Mgo Microspheres Via Ethylene-Glycol-Mediated Process as a Base Heterogeneous Catalyst for Transesterification for Biodiesel Production
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Medientyp:
E-Book
Titel:
Synthesis of Hierarchical Flower-Shaped Hollow Mgo Microspheres Via Ethylene-Glycol-Mediated Process as a Base Heterogeneous Catalyst for Transesterification for Biodiesel Production
Beschreibung:
Hierarchical flower-shaped hollow MgO (f-MgO) spheres were synthesized through an ethylene-glycol-mediated polyol process via hydrothermal reactions. The structure of f-MgO originates from intermediate flower-shaped Mg glycolate through the Ostwald ripening process. The surface of f-MgO consists of uniform petal-like nanosheets that provide high surface area and excellent accessibility to catalytic sites. The morphology and structure of f-MgO were investigated using X-ray diffraction, scanning electron microscopy, and transmission electron microscopy. The density of basic catalytic sites was derived from CO2-temperature-programmed desorption measurements. The f-MgO exhibits a basic site density of 0.5134 mmol/g, which is much higher than that of commercial MgO (c-MgO, 0.0288 mmol/g). Experimental results for the fatty acid methyl ester revealed that the catalytic strength of f-MgO as a heterogeneous catalyst for biodiesel production is greater than that of c-MgO. The maximum biodiesel conversion efficiency of f-MgO from canola oil is 93.4%, which is greater than the value of 91.4% for c-MgO