Vanadyl phosphate catalysts in biodiesel production

被引:100
作者
Di Serio, M.
Cozzolino, M.
Tesser, R.
Patrono, P.
Pinzari, F.
Bonelli, B.
Santacesaria, E.
机构
[1] Univ Naples Federico 2, Dipartimento Chim, I-80126 Naples, Italy
[2] CNR, IMIP, Area Ric Roma, I-00016 Monterotondo, Italy
[3] Politecn Torino, Dipartimento Sci Mat & Ingn Chim, I-10129 Turin, Italy
关键词
transesterification; biodiesel; vanadyl phosphate; heterogeneous catalysis;
D O I
10.1016/j.apcata.2006.11.025
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
The possibility of using vanadyl phosphate (VOP)-based catalysts in biodiesel production has been investigated. Vanadium phosphate catalysts resulted very active in the transesterification reaction of triglycerides with methanol, despite their low specific surface area. A slow deactivation of the catalysts has been experimentally detected under the reaction conditions, but the catalyst can easily be regenerated by calcinations in air. The influence of the calcination treatment on the surface structure and, consequently, on its catalytic performances was deeply investigated. Both fresh and used catalysts were characterized by using several techniques, such as BET, X-ray diffraction (XRD), UV-vis diffuse reflectance (DRUV) and laser-Raman (LRS). The characterization results showed that the deactivation is due to a progressive reduction of vanadium (V) species from V5+ to V4+ and V3+ by methanol. By comparing the obtained performances of VOP catalysts with the ones of other heterogeneous catalysts reported by the literature, it is possible to conclude that VOP catalysts can already be used industrially for biodiesel production but their performances can probably be greatly improved in perspective. (c) 2006 Elsevier B.V. All rights reserved.
引用
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页码:1 / 7
页数:7
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