https://scholars.lib.ntu.edu.tw/handle/123456789/408155
標題: | Transesterification of triolein to biodiesel using sodium-loaded catalysts prepared from zeolites | 作者: | Wang Y.-Y. D?ng T.H. Chen B.-H. Lee D.-J. |
公開日期: | 2012 | 卷: | 51 | 期: | 30 | 起(迄)頁: | 9959-9965 | 來源出版物: | Industrial and Engineering Chemistry Research | 摘要: | Transesterification of triolein in excess methanol over sodium-loaded catalysts prepared from Na-ion exchange with zeolites at a relatively lower reaction temperature, namely, at 60 ¢XC, is studied in this work. Two zeolites, i.e., as-synthesized Zeolite MCM-22 and commercial Zeolite HY (CBV-780), are employed in this study. Although both zeolites show to some extent the capability of catalyzing transesterification of triolein in methanol to biodiesel, the resulting yields are only ca. 90% for CBV-780 after a 40-h reaction and 16.3% for MCM-22 after a 90-h reaction. In contrast, the conversion yields are much improved with Na-ion exchange to the surface of zeolite catalysts. For example, the yields of triolein to biodiesel have reached 98% and 99% within a 5.5-h reaction, respectively, using the NaOH-treated CBV-780 and MCM-22 catalysts, even if these NaOH-treated catalysts become amorphous and have suffered a loss of the Brunauer-Emmett-Teller surface area. Furthermore, no saponification was observed using these NaOH-treated catalysts. ? 2012 American Chemical Society. |
URI: | https://scholars.lib.ntu.edu.tw/handle/123456789/408155 | ISSN: | 08885885 | DOI: | 10.1021/ie202782q |
顯示於: | 化學工程學系 |
在 IR 系統中的文件,除了特別指名其著作權條款之外,均受到著作權保護,並且保留所有的權利。