01735nab a2200205 4500 20260520000928.0 260224s2011 xxu Development of biochar-based catalyst for transesterification of canola oil ene./feb. 2011 04/04/2011 ; 04/04/2011 8 p. ; 337–344 Transcripción del resumen del autor. Heterogeneous catalysts bearing sulfonic acid groups were prepared using biochar as the carbon support. Biochar samples were first treated with KOH before carbonization at different temperatures (450, 675, and 875 °C) then sulfonated using fuming H2SO4 at 150 °C for 15 h. The sulfonated catalysts were characterized using BET surface area and porosity, elemental analysis, total acid density, FT-IR spectroscopy, X-ray diffraction, and thermogravimetric analysis. Catalytic performance was determined via the transesterification of canola oil with methanol. The reaction yield was found to be dependent on both catalyst surface area and total acid density, suggesting that the maximum yield would be obtained for a catalyst prepared from char carbonized between 675 and 875 °C. FT-IR spectra and XRD patterns reveal that higher carbonization temperatures cause an increasing reorientation of the biochar’s carbon sheets toward a more graphite-like structure, decreasing the total acid density despite the increasing surface area. Catalyst reusability was poor under high temperature/pressure conditions. 1 Energy & fuels 25 ARTICULO Yu, Joyleene T. 45062 Dehkhoda, Amir Mehdi 45063 Ellis, Naoko 45064 174411 174411 0 0 0 0 242230 BAAB BAAB 2026-03-05 200052427 0 200052427 2026-03-05 16:11:50 2026-03-05 ARTICULO