Properties of MgAlCuFe Complex Oxides for FCC Desulfurization:Effect of Metal Salt Precursors
A series of MgAlCuFe complex oxides used for the removal of SOx from FCC flue gas were prepared by decomposition of MgAlCuFe hydrotalcite precursors at 700℃ for 6 h. The influence of different metal salts in the sulfur transfer catalyst was investigated. X-ray diffraction, thermogravimetric analysis, N2 adsorption, and infrared spectroscopy showed that all the sulfur transfer catalysts exhibited a better dispersion of metal oxides in the matrix. The results of the SO2 adsorption-reduction test showed that the novel catalyst MgAlCuFe prepared from nitrates reached 1.54 g/g of total saturation adsorption capacity in 6 min under the conditions similar to those of typical FCC. These catalysts achieved high oxidative adsorption rate, short saturation time, and large reductive capacity.
sulfur transfer catalysthydrotalcite-like compoundcomplex oxidemetal saltsulfur oxidative adsorptionreductive desorption
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万方数据
维普
