Promotional effect of transition metal doping on the properties of KF/CaO catalyst for biodiesel synthesis. Issue 9 (15th July 2017)

• Record Type: Journal Article
• Authors: Yang, Lingmei; Lv, Pengmei; Wang, Zhongming; Yuan, Zhenhong; Luo, Wen; Li, Huiwen; Yu, Luo; Sun, Hongzhe
• Is Part Of: International journal of green energy. Volume 14:Issue 9(2017)
• Page Start: 784
• Page End: 791
• Publication Date: 2017-07-15
• Subjects: Biodiesel -- heterogeneous catalyst -- transesterification -- transition metal -- waste cooking oil; Power resources -- Research -- Periodicals; Energy industries -- Periodicals; Energy development -- Periodicals; 333.79
• DOI: 10.1080/15435075.2017.1330752
• Languages: English
• ISSNs: 1543-5075

Abstract

ABSTRACT: A series of heterogeneous KF/CaO catalysts modified with transition metals (lanthanum, cerium, and zirconium) were prepared via wet impregnation method and applied to the trsansesterification process of waste cooking oil (WCO) as feedstock with methanol to biodiesel production. The structure, performance of the solid catalysts was characterized by X-ray diffraction (XRD), temperature programmed desorption of CO2 (CO2 -TPD), scanning electron microscopy (SEM), and energy-dispersive spectroscopy (EDS). The effect of methanol/oil molar ratio, 1 reaction time, reaction temperature, catalyst amount, and stability was investigated. The results showed that 10 wt% of lanthanum, cerium, and zirconium improved the catalytic activity of KF/CaO catalyst. The maximum catalytic activity using the lanthanum doping of 10wt% on KF/CaO catalyst was reached 98.7% under the optimal reaction condition of methanol/oil molar ratio of 12:1, reaction for 1 h at reaction temperature of 65°C, and 4% (wt/wt oil) catalyst amount. In addition, the FAME yield of KF/CaO/La catalyst remained higher than 95% after 10 cycles. The promotional effect of lanthanum doping could be attributed to the enhancement of the basicity strength of KF/CaO catalyst and block the leach of Ca 2+ in the transesterification reaction.