TY - JOUR AB - Biodiesel production by simultaneous esterification and transesterification of waste oil with methanol has been studied in a heterogeneous system using solid ferric hydrogen sulphate [Fe (HSO4)(3)] acid catalyst. The catalyst was prepared by displacement reaction followed by calcination at 400 degrees C for 3 h. The prepared catalyst was characterized using X-ray diffraction (XRD), Fourier transform infrared spectrometer (FT-IR), Brunner-Emmett-Teller surface area measurement (BET), thermal gravimetric analyzer (TGA) and temperature-programmed desorption of NH3 (TPD - NH3). Furthermore, the dependence of the conversion of mixed waste oil on the reactions variables such as the molar ratio of methanol/oil, the amount of catalysts used, reaction temperatures, reusability were also investigated. The catalyst was reused many times with slight loss in activity and the maximum yield of 94.5% was achieved at the optimized conditions of reaction temperature of 205 degrees C; stirring speed of 350 rpm, 1:15 molar ratio of oil to alcohol and 1% w/w catalyst loading. (C) 2013 Elsevier B.V. All rights reserved. AD - Univ Putra Malaysia, Fac Sci, Catalysis Sci & Technol Res Ctr, Upm Serdang 43400, Selangor, Malaysia AN - WOS:000319637400021 AU - Alhassan, F. H. AU - Yunus, R. AU - Rashid, U. AU - Sirat, K. AU - Islam, A. AU - Lee, H. V. AU - Taufiq-Yap, Y. H. DA - Apr 10 DO - 10.1016/j.apcata.2013.02.019 J2 - Appl Catal a-Gen KW - biodiesel LA - English N1 - 153xz PY - 2013 SN - 0926-860x SP - 182-187 ST - Production of biodiesel from mixed waste vegetable oils using Ferric hydrogen sulphate as an effective reusable heterogeneous solid acid catalyst T2 - Applied Catalysis a-General TI - Production of biodiesel from mixed waste vegetable oils using Ferric hydrogen sulphate as an effective reusable heterogeneous solid acid catalyst UR - ://WOS:000319637400021 VL - 456 ID - 8401 ER -