Study on Removal of Sulfur Dioxide from Flue Gas by Mg-Ce Bimetallic Oxide Modified Activated Carbon
The coal based columnar formed commercial activated carbon suitable for industrial application was used as the modified object,and the modified activated carbon was loaded with MgO and CeO2 by immersion calcination method.XRD,SEM and N2 adsorption and desorption were used to characterize the phase,micromorphology,specific surface area and pore structure of activated carbon before and after modification,and its desulfurization performance was tested.The experimental results showed that the impregnation calcination method used in this experiment could realize the uniform load of Mg-Ce metal oxide on the inner surface of activated carbon;the load of Mg-Ce metal oxide reduced the specific surface area and porosity of activated carbon,resulting in the decrease of the physical adsorption performance of activated carbon,but significantly improved its chemisorption performance.Among them,the bimetallic oxide modified activated carbon obtained by immersion calcination of mass fraction 6%Mg and mass fraction 4%Ce had the best desulfurization performance.The maximum desulfurization capacity was 63.9 mg·g-1,which was 51 times of that before modification.
Mg-Ce metal metal oxidesActivated carbonModificationFlue gas desulfurization
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