Synthesis and characterization of mesoporous materials containing cerium, lanthanum and praseodymium by nonhydrothermal method

被引：1

作者：

Silva, Albanise E. ^{[1
]}

Ribeiro, Livia M. O. ^{[1
]}

Silva, Bruno J. B. ^{[1
]}

Costa, Tiago P. M. ^{[1
]}

Meneguetti, Simoni M. P. ^{[1
]}

Silva, Antonio O. S. ^{[1
]}

机构：

[1] Univ Fed Alagoas, Tabuleiro Martins, Lourival Melo Mota, BR-57072970 Maceio, AL, Brazil

来源：

JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY | 2015年 / 75卷 / 02期

关键词：

Mesoporous materials; MCM-41; Rare earth; Esterification; Oleic acid; ONE-POT SYNTHESIS; MCM-41; BIODIESEL; CATALYST; ACID;

D O I：

10.1007/s10971-015-3714-4

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Mesoporous molecular sieves the type MCM-41 (Mobil Composition of Matter of number n) modified with rare earth elements cerium, lanthanum and praseodymium (CeMCM-41, LaMCM-41 and PrMCM-41) was synthesized via direct and nonhydrothermal method at 80 A degrees C and characterized by X-ray diffraction, nitrogen absorption (BET/BJH), thermal analysis (TG/DTG), infrared spectroscopy (FT-IR), scanning electron microscopy, transmission electron microscopy and acidity measurements. The catalytic activity of the synthesized catalysts was tested in an esterification reaction of oleic acid with methanol. The reaction was carried out at 130 A degrees C with an alcohol/acid molar ratio of 8 and 5 wt% catalysts for 2 h. Among all of the catalysts tested in this study, the most efficient was LaMCM-41 affording over ca. 37 wt% of conversion. Hence, the catalyst LaMCM-41 was used for the detailed study on the effect of any reaction parameters such as acid/alcohol molar ratio, temperature and reaction time to obtain the conditions for maximum conversion. [GRAPHICS] .

引用

页码：413 / 423

页数：11

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