TY - JOUR AB - The application of an environmentally benign sulfonated carbon microsphere catalyst for biodiesel production from waste cooking oil was investigated. This catalyst was prepared by the sequential hydrothermal carbonization and sulfonation of xylose. The morphology, surface area, and acid properties were analyzed. The surface area and acidity of the catalyst were 86m(2)/g and 1.38mmol/g, respectively. In addition, the presence of sulfonic acid on the carbon surface was confirmed by Fourier transform infrared spectroscopy and X-ray photoelectron spectroscopy. The catalytic activity was tested for biodiesel production from waste cooking oil via a two-step reaction to overcome reaction equilibrium. The highest biodiesel yield (89.6%) was obtained at a reaction temperature of 110 degrees C, duration time of 4h, and catalyst loading of 10wt% under elevated pressure 2.3bar and 1.4bar for first and second step, respectively. The reusability of the catalyst was investigated and showed that the biodiesel yield decreased by 9% with each cycle; however, this catalyst is still of interest because it is an example of green chemistry, is nontoxic, and makes use of xylose waste. AD - Department of Chemistry, Faculty of Science and Technology, Thammasat University, Pathumthani 12120, Thailand. AN - 27053375 AU - Tran, T. T. AU - Kaiprommarat, S. AU - Kongparakul, S. AU - Reubroycharoen, P. AU - Guan, G. AU - Nguyen, M. H. AU - Samart, C. DA - Jun DO - 10.1016/j.wasman.2016.03.053 KW - *Biofuels N1 - Tran, Thi Tuong Vi PY - 2016 SN - 1879-2456 (Electronic) SP - 367-74 ST - Green biodiesel production from waste cooking oil using an environmentally benign acid catalyst T2 - Waste Manag TI - Green biodiesel production from waste cooking oil using an environmentally benign acid catalyst UR - https://www.ncbi.nlm.nih.gov/pubmed/27053375 VL - 52 ID - 15744 ER -