title: Biodiesel production from waste cooking oil using a heterogeneous catalyst from pyrolyzed rice husk.
abstract: A solid acid catalyst was prepared by sulfonating pyrolyzed rice husk with concentrated sulfuric acid, and the physical and chemical properties of the catalyst were characterized in detail. The catalyst was then used to simultaneously catalyze esterification and transesterification to produce biodiesel from waste cooking oil (WCO). In the presence of the as-prepared catalyst, the free fatty acid (FFA) conversion reached 98.17% after 3h, and the fatty acid methyl ester (FAME) yield reached 87.57% after 15 h. By contrast, the typical solid acid catalyst Amberlyst-15 obtained only 95.25% and 45.17% FFA conversion and FAME yield, respectively. Thus, the prepared catalyst had a high catalytic activity for simultaneous esterification and transesterification. In addition, the catalyst had excellent stability, thereby having potential use as a heterogeneous catalyst for biodiesel production from WCO with a high FFA content.
authors.affiliation: Key Laboratory for Biomass Clean Energy of Anhui Province, University of Science and Technology of China, Hefei 230026, China.
authors.forename: Ming
authors.initials: M
authors.lastname: Li
authors.affiliation: Key Laboratory for Biomass Clean Energy of Anhui Province, University of Science and Technology of China, Hefei 230026, China.
authors.forename: Yan
authors.initials: Y
authors.lastname: Zheng
authors.affiliation: Key Laboratory for Biomass Clean Energy of Anhui Province, University of Science and Technology of China, Hefei 230026, China.
authors.forename: Yixin
authors.initials: Y
authors.lastname: Chen
authors.affiliation: Key Laboratory for Biomass Clean Energy of Anhui Province, University of Science and Technology of China, Hefei 230026, China. Electronic address: xfzhu@ustc.edu.cn.
authors.forename: Xifeng
authors.initials: X
authors.lastname: Zhu
mesh_terms: D056804:Biofuels; D001709:Biotechnology / Q000379:methods*; D002384:Catalysis; D002606:Charcoal / Q000737:chemistry; D003296:Cooking; D004951:Esterification; D004952:Esters / Q000032:analysis; D009821:Oils / Q000737:chemistry*; D012275:Oryza / Q000737:chemistry*; D013343:Styrenes / Q000737:chemistry; D013696:Temperature; D014866:Waste Products
chemical_list: D056804:Biofuels; D004952:Esters; D009821:Oils; D013343:Styrenes; D014866:Waste Products; C528218:amberlyst-15; C540010:biochar; D002606:Charcoal
keywords: Biodiesel; Rice husk char; Solid acid catalyst; Waste cooking oil