Effect of lanthanide ion doping on Mg−Al mixed oxides as active acid−base catalysts for fatty acid ethyl ester synthesis. (April 2019)

• Record Type: Journal Article
• Authors: de Souza Rossi, Jessika; Perrone, Olavo Micali; Siqueira, Marcos Rechi; Volanti, Diogo Paschoalini; Gomes, Eleni; Da-Silva, Roberto; Boscolo, Mauricio
• Is Part Of: Renewable energy. Volume 133(2019)
• Page Start: 367
• Page End: 372
• Publication Date: 2019-04
• Subjects: Transesterification -- Layered double hydroxide -- Hydrotalcite -- Rare-earth -- Fatty acid ethyl ester; Renewable energy sources -- Periodicals; Power resources -- Periodicals; Énergies renouvelables -- Périodiques; Ressources énergétiques -- Périodiques; 333.794
• DOI: 10.1016/j.renene.2018.10.038
• Languages: English
• ISSNs: 0960-1481

Abstract

Abstract: MgAl-hydrotalcites (HT) containing 1–2% of the lanthanide ions La 3+, Ce 3+ and Lu 3+ were evaluated as heterogeneous catalysts in the transesterification process for fatty acid ethyl ester (FAEE) synthesis in order to understand the effect of the high ionic-radii of these metals in the material structure and their catalytic activity. The addition of lanthanides to the catalysts resulted in a decrease of the thermal degradation temperature as well as the specific surface, but, on the other hand, it increases the basicity, crystallinity, and improve the yield in biodiesel production. In general, MMOs with 1% of lanthanides showed higher yields than those with 2%, and the oxide with 1% of Lu 3+ reached the best catalytic result for ethanol biodiesel production (84%), about 4.5 times greater than the reference material. Graphical abstract: Image 1 Highlights: Synthesis of mixed oxides with lanthanides ions as catalysts for biodiesel production. Lanthanide ions improve the catalytic efficiency of mixed oxides in transesterification process. Comparative test reveals lutetium as the best lanthanide for modifying hydrotalcite precursors for ethyl biodiesel catalysis. Improvement in the production of ethyl biodiesel by heterogeneous catalysis with yields greater than 80%.