Simanjuntak, Fidelis Stefanus Hubertson Widyaya, Vania Tanda Kim, Chang Soo Ahn, Byoung Sung Kim, Yong Jin Lee, Hyunjoo 2024-01-20T12:30:51Z 2024-01-20T12:30:51Z 2021-09-05 2013-05-03 0009-2509 https://pubs.kist.re.kr/handle/201004/128068 Various magnesium-lanthanum mixed oxide catalysts having different Mg/La molar ratio were prepared and their catalytic activities for the transesterification of dimethyl carbonate (DMC) with glycerol for the synthesis of glycerol carbonate (GLC) were compared. Depending on the molar ratio of Mg/La, the precipitation agent, and the calcinations temperature in the preparation step, the catalytic activity and the surface basic site concentration changed. The most active catalyst having the high basic site concentration was obtained when a 3/1 molar ratio of Mg(NO3)(2) center dot 6H(2)O/La(NO3)(3) center dot 6H(2)O mixture was co-precipitated using a KOH/K2CO3 mixture and calcined at 720 degrees C for 4 h. Catalyst characterization using XRD, elemental analysis, Brunauer-Emmet-Teller (BET) surface area, and TPD revealed that the catalyst preparation condition affected catalyst composition, structure, and surface area as well as basic site concentration. The effect of reaction conditions such as reaction time, DMC/glycerol molar ratio, reaction temperature, and catalyst amount were also discussed. (c) 2013 Elsevier Ltd. All rights reserved. English PERGAMON-ELSEVIER SCIENCE LTD TRANSESTERIFICATION SOLVENT UREA Synthesis of glycerol carbonate from glycerol and dimethyl carbonate using magnesium-lanthanum mixed oxide catalyst Article 10.1016/j.ces.2013.01.070 1 CHEMICAL ENGINEERING SCIENCE, v.94, pp.265 - 270 CHEMICAL ENGINEERING SCIENCE 94 265 270 scie scopus 000318613200027 2-s2.0-84875685665 Engineering, Chemical Engineering Article TRANSESTERIFICATION SOLVENT UREA Glycerol Glycerol carbonate Catalysis Catalyst support Catalyst activation Particle formation