Publication: Synthesis, characterization, and activity in transesterification of mesoporous Mg-Al mixed-metal oxides
Issued Date
2010-03-01
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ISSN
13871811
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2-s2.0-71849101621
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Mahidol University
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SCOPUS
Bibliographic Citation
Microporous and Mesoporous Materials. Vol.128, No.1-3 (2010), 41-47
Suggested Citation
Jonggol Tantirungrotechai, Pannapat Chotmongkolsap, Manat Pohmakotr Synthesis, characterization, and activity in transesterification of mesoporous Mg-Al mixed-metal oxides. Microporous and Mesoporous Materials. Vol.128, No.1-3 (2010), 41-47. doi:10.1016/j.micromeso.2009.08.001 Retrieved from: https://repository.li.mahidol.ac.th/handle/123456789/28952
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Title
Synthesis, characterization, and activity in transesterification of mesoporous Mg-Al mixed-metal oxides
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Abstract
In this work, a series of Mg-Al mixed-metal oxides with Mg/Al ratios of 0.125-8 were synthesized via a sol-gel method using cetyltrimethylammonium bromide as a template. All oxide samples were characterized by XRD, XRF, IR, DTA-TGA, TEM, and N2adsorption-desorption measurements. The phases of the Mg-Al mixed-metal oxides are the mixture of γ-Al2O3and periclase (MgO) or the mixture of hydrotalcite (Mg6Al2CO3(OH)16·4H2O) and periclase depending on the Mg/Al ratio. The Mg-Al oxides have mesoporous structure with surface areas in the range of 120-270 m2/g. These oxides were also impregnated with KI to increase their base strength, and their activities for biodiesel production were tested via the transesterification of soybean oil with methanol. The KI impregnated Mg-Al mixed-metal oxide at Mg/Al ratio of 4:1 has base strength in the range of 9.8 ≤ pKBH+≤ 15 and, of all the catalysts tested, it is the most efficient catalyst for transesterification of soybean oil with methanol (>90% conversion after 8 h). © 2009 Elsevier Inc. All rights reserved.