Transesterification of rapeseed oil under flow conditions catalyzed by basic solids: MAl(La)O (M = Sr, Ba), MMgO (M = Y, La)

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• 作者：O.V. Sherstyuk^a ; ^{sherstuk@catalysis.ru} ; A.S. Ivanova^a ; M.Y. Lebedev^a ; ^b ; M.V. Bukhtiyarova^a ; ^b ; L.G. Matvienko^a ; A.A. Budneva^a ; A.N. Simonov^a ; V.A. Yakovlev^a
• 关键词：Biodiesel ; Solid base catalysts ; FTIR spectra ; Rapeseed oil ; Transesterification
• 刊名：Applied Catalysis A ; General
• 出版年：2012
• 期刊代码：4_0926860x
• 类别：ch
• 出版时间：29 March, 2012
• 卷：419-420
• 期：Complete
• 页码：73-83
• 文件大小：1169 K

摘要

Binary composites on basis of MAlO (M = Sr, Ba), MMgO (M = Y, La), MLaO (M = Sr, Ba) prepared by precipitation and calcined at 700-1200 掳C were characterized by thermal analysis (TG-DTA), X-ray diffraction (XRD), Fourier transform infrared spectroscopy of adsorbed probe molecule CDCl₃ (FTIR), low temperature nitrogen adsorption and heat desorption of argon and their catalytic activity towards the transesterification reaction of rapeseed oil was studied in the flow fixed bed reactor at 200 掳C and 20 atm. The phase composition, texture and surface composition of the catalysts are determined by their chemical nature and calcination temperature. The performance of the catalysts calcined at 700-750 掳C diminishes in the order of SrLaO > BaLaO > LaMgO 鈮?#xA0;YMgO > BaAlO⁷⁰⁰ > SrAlO⁷⁰⁰ and is in a straight correlation with the integrated intensity of absorption of surface carbonate species representing the amount of the strong basic sites on the surface of the catalysts. Thermal treatment of MAlO (M = Sr, Ba) catalysts at 1200 掳C exerts minor influence on their performance.