标题：Synthesis, characterization, and SO2removal capacity of MnMgAlFe mixed oxides derived from hydrotalcite-like compounds
作者：Kang, Hai Tao ;Lv, Kai ;Yuan, Shi Ling
作者机构：[Kang, Hai Tao ;Lv, Kai ;Yuan, Shi Ling ] Key Lab. of Colloid and Interface Chemistry, Ministry of Education, School of Chemistry and Chemical Enginee 更多
来源：Applied Clay Science
摘要：Fe (III), Mn (II)-substituted Mg-Al hydrotalcite-like compounds were prepared by co-precipitation method and MnMgAlFe mixed oxides derived from hydrotalcite-like compounds (calcination at 1023K for 4h) were tested for SO2removal under the conditions similar to those of FCC units. XRD, IR, TG/DTA and N2adsorption analysis were performed to investigate the physicochemical and textural properties of the samples. The results showed that all samples exhibited good dispersion of metal oxides in the matrix. The SO2adsorption-reduction tests showed that on the basis of MgAl adsorbent, addition of a certain amount manganese and iron could enhance the the SO2removal capacity and adsorption rates of catalysts in FCC units and the sample that contains 5% Fe and 10% Mn showed the best effect. Further analysis suggested that Fe and Mn could cooperatively promote the oxidation of SO2to SO3that is easier to be chemisorbed by catalysts and Fe simultaneously played a role as reducing promoter which is essential for reusability of the catalysts. © 2013 Elsevier B.V.