TY - JOUR AB - Al(HSO(4))(3) heterogeneous acid catalyst was prepared by the sulfonation of anhydrous AlCl(3). This catalyst was employed to catalyze transesterification reaction to synthesis methyl ester when a mixed waste vegetable oil was used as feedstock. The physical and chemical properties of aluminum hydrogen sulphate catalyst were characterized by scanning electron microscopy (SEM) measurements, energy dispersive X-ray (EDAX) analysis and titration method. The maximum conversion of triglyceride was achieved as 81 wt.% with 50 min reaction time at 220 degrees C, 16:1 molar ratio of methanol to oil and 0.5 wt.% of catalyst. The high catalytic activity and stability of this catalyst was related to its high acid site density (-OH, Bronsted acid sites), hydrophobicity that prevented the hydration of -OH group, hydrophilic functional groups (-SO(3)H) that gave improved accessibility of methanol to the triglyceride. The fuel properties of methyl ester were analyzed. The fuel properties were found to be observed within the limits of ASTM 06751. (C) 2011 Elsevier Ltd. All rights reserved. AD - Anna Univ, Dept Chem Engn, Madras 600025, Tamil Nadu, India AN - WOS:000292668000008 AU - Ramachandran, K. AU - Sivakumar, P. AU - Suganya, T. AU - Renganathan, S. DA - Aug DO - 10.1016/j.biortech.2011.04.100 IS - 15 J2 - Bioresource Technol KW - methyl ester LA - English N1 - 791lz PY - 2011 SN - 0960-8524 SP - 7289-7293 ST - Production of biodiesel from mixed waste vegetable oil using an aluminium hydrogen sulphate as a heterogeneous acid catalyst T2 - Bioresource Technology TI - Production of biodiesel from mixed waste vegetable oil using an aluminium hydrogen sulphate as a heterogeneous acid catalyst UR - ://WOS:000292668000008 VL - 102 ID - 6886 ER -