Biodiesel production from soybean oil catalyzed by multifunctionalized Ta₂O₅/SiO₂-[H₃PW₁₂O₄₀/R] (R = Me or Ph) hybrid catalyst

Leilei Xu, Wei Li, Jianglei Hu, Xia Yang and Yihang Guo

Applied Catalysis B: Environmental 90 ( 3-4 ): 587 - 594 , 2009