Abstract: MgAlZnFeCe hydrotalcite-like precursors were prepared by a hydrothermal method using MgO as magnesium resource and pseudoboehmite as aluminum resource, and using metal chlorides of Zn,Fe and Ce as catalytic additives. MgAlZnFeCe complex oxides were prepared by decomposition of MgAlZnFeCe hydrotalcite-like precursors at 700℃ for 6h, which were used for the removal of SO_x from FCC flue gas. XRD, TG-DTA analysis show that hydrotalcite-like compound is the major component while the minor phase is Mg(OH)₂ as the impure phase. The results of SO_x adsorption-reduction test show that the novel catalyst MgAlZnFeCe-LDO reaches 1.16g/g of total saturation adsorption capacity in 10min in the condition similar to that of a typical FCC, which achieves high oxidative adsorption rate, short saturation time, and large reductive capacity. 

Key words: sulfur transfer catalyst, hydrotalcite-like compound, hydrothermal method, SO_x oxidative adsorption, reductive desorption