Simanjuntak, Fidelis Stefanus Hubertson Lim, Seung Rok Ahn, Byoung Sung Kim, Hoon Sik Lee, Hyunjoo 2024-01-20T09:03:13Z 2024-01-20T09:03:13Z 2021-09-02 2014-08-22 0926-860X https://pubs.kist.re.kr/handle/201004/126451 Various forms of MgO were synthesized and used as catalysts in the transesterification of dimethyl carbonate (DMC) with glycerol for the synthesis of glycerol carbonate (GLC). MgO synthesized using a surfactant (a triblock copolymer of ethylene oxide/propylene oxide/ethylene oxide, known as Pluronic F127) showed a much higher GLC yield of 75.4% compared to other MgO catalysts synthesized without using a surfactant at reaction conditions of 90 degrees C, DMC/glycerol = 2, and catalyst/glycerol = 5 wt%. With an increase of the weight ratio of the surfactant/Mg precursor, the catalytic activity was increased. However, the activity did not change substantially when the surfactant/Mg precursor ratio was greater than 5. The high catalytic activity of MgO prepared with the surfactant (MgO-S) is attributed to the higher basic site concentration on the surface. This originated from low-coordination oxide ions at the corner sites (O-3c(2-)), as shown in the basic site titration and UV-diffuse reflectance analysis results. It is also noted that MgO-S could be easily recovered after the reaction and reused at least five times without serious catalyst deactivation. (C) 2014 Elsevier B.V. All rights reserved. English ELSEVIER SCIENCE BV MAGNESIUM-OXIDE NANOCRYSTALLINE MGO INORGANIC MATERIALS HYDROXIDE SIZE NANOSTRUCTURES BIODIESEL Surfactant-assisted synthesis of MgO: Characterization and catalytic activity on the transesterification of dimethyl carbonate with glycerol Article 10.1016/j.apcata.2014.06.028 1 APPLIED CATALYSIS A-GENERAL, v.484, pp.33 - 38 APPLIED CATALYSIS A-GENERAL 484 33 38 scie scopus 000342476700005 2-s2.0-84904958296 Chemistry, Physical Environmental Sciences Chemistry Environmental Sciences & Ecology Article MAGNESIUM-OXIDE NANOCRYSTALLINE MGO INORGANIC MATERIALS HYDROXIDE SIZE NANOSTRUCTURES BIODIESEL Glycerol Dimethyl carbonate Glycerol carbonate Magnesium oxide Surfactant