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  • Transesterification of sunflower oil to biodiesel on ZrO2 supported La2O3 catalyst.

Transesterification of sunflower oil to biodiesel on ZrO2 supported La2O3 catalyst.

Bioresource technology (2009-09-22)
Hui Sun, Yuqi Ding, Jinzhao Duan, Qijun Zhang, Zhiyong Wang, Hui Lou, Xiaoming Zheng
ABSTRACT

ZrO(2) supported La(2)O(3) catalyst prepared by impregnation method was examined in the transesterification reaction of sunflower oil with methanol to produce biodiesel. It was found that the catalyst with 21 wt% loaded La(2)O(3) and calcined at 600 degrees C showed the optimum activity. The basic property of the catalyst was studied by CO(2)-TPD, and the results showed that the fatty acid methyl ester (FAME) yield was related to their basicity. The catalyst was also characterized by TG-DTA, XRD, FTIR, SEM and TEM, and the mechanism for the formation of basic sites was discussed. It was also found that the crystallite size of support ZrO(2) decreased by loading of La(2)O(3), and the model of the solid-state reaction on the surface of La(2)O(3)/ZrO(2) catalyst was proposed. Besides, the influence of various reaction variables on the conversion was investigated.

MATERIALS
Product Number
Brand
Product Description

Sigma-Aldrich
Lanthanum(III) oxide, ≥99.9%
Sigma-Aldrich
Lanthanum(III) oxide, 99.99% trace metals basis
Sigma-Aldrich
Lanthanum(III) oxide, 99.999% trace metals basis
Supelco
Lanthanum(III) oxide, suitable for AAS, ≥99.9%
Sigma-Aldrich
Lanthanum(III) oxide, nanopowder, <100 nm particle size (TEM), 99% trace metals basis