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- W2067174805 abstract "The transesterification of soybean oil with methanol to biodiesel using lanthanum doped zinc aluminate with spinel structure as catalyst is studied. The catalyst was characterized by X-ray diffraction (XRD), N2 adsorption/desorption, temperature programmed desorption of CO2 (CO2-TPD) and infrared spectroscopy of CO2 adsorption (CO2-IR). The results of CO2-IR show that the basic sites of La doped zinc aluminate are surface isolated O2− anions and OH− groups. The results of CO2-TPD show that the total amount of basic sties of the catalyst improves with the increase of the La doping amount until which is to 18.5 wt%. Doping La also enlarges the pore volume and diameter of zinc aluminate. It gets the largest pore volume (0.30 cm3 g−1) and pore diameter (7.9 nm) when doped with 5.5 wt% La. Zinc aluminate doped with 5.5 wt% La (5.5% La/ZnAl2O4) exhibits the highest activity, with which the biodiesel yield exceeds 95% at 160 °C, 2.0 MPa and 0.9 h−1. Furthermore, the transesterification reaction of about 500 h in a fixed-bed reactor was carried out over 5.5% La/ZnAl2O4 catalyst. No deactivation and leaching of catalyst components were happened on the catalyst in reaction." @default.
- W2067174805 created "2016-06-24" @default.
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- W2067174805 date "2013-06-01" @default.
- W2067174805 modified "2023-10-15" @default.
- W2067174805 title "The effect of lanthanum doping on activity of Zn-Al spinel for transesterification" @default.
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- W2067174805 doi "https://doi.org/10.1016/j.apcatb.2013.01.065" @default.
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