title: Study of KOH/Al2O3 as heterogeneous catalyst for biodiesel production via in situ transesterification from microalgae.
abstract: Heterogeneous KOH/Al2O3 catalysts, synthesized by the wet impregnation method with different KOH loadings (20-40 wt%) and calcination temperatures from 400°C to 800°C, were used to produce biodiesel from Chlorella vulgaris biomass by in situ transesterification. The highest yield of biodiesel of 89.53±1.58% was achieved at calcination temperature of 700°C for 2 h and 35 wt% loading of KOH, and at the optimal reaction condition of 10 wt% of catalyst content, 8 mL/g of methanol to biomass ratio and at 60°C for 5 h. The characteristics of the catalysts were analysed by X-ray diffraction, scanning electron microscopy and Brunauer-Emmett-Teller.
authors.affiliation: a School of Environmental Science and Engineering , Shandong University , Jinan 250100 , People's Republic of China.
authors.forename: Guixia
authors.initials: G
authors.lastname: Ma
authors.forename: Wenrong
authors.initials: W
authors.lastname: Hu
authors.forename: Haiyan
authors.initials: H
authors.lastname: Pei
authors.forename: Liqun
authors.initials: L
authors.lastname: Jiang
authors.forename: Yan
authors.initials: Y
authors.lastname: Ji
authors.forename: Ruimin
authors.initials: R
authors.lastname: Mu
mesh_terms: D000537:Aluminum Oxide; D056804:Biofuels; D018533:Biomass; D002384:Catalysis; D048408:Chlorella vulgaris / Q000378:metabolism*; D004951:Esterification; D006878:Hydroxides; D000432:Methanol / Q000378:metabolism; D058086:Microalgae / Q000378:metabolism*; D008855:Microscopy, Electron, Scanning; D017680:Potassium Compounds; D014961:X-Ray Diffraction
chemical_list: D056804:Biofuels; D006878:Hydroxides; D017680:Potassium Compounds; D000537:Aluminum Oxide; C029943:potassium hydroxide; D000432:Methanol
keywords: biodiesel; heterogeneous catalyst; in situ; microalgae; transesterification