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Adsorption performance of SO2 over ZnAl2O4 nanospheres
Ling Zhao,Sining Bi,Jiasi Pei,Xinyong Li,Ruihong Yu,Ji Zhao,Christopher J. Martyniuk 한국공업화학회 2016 Journal of Industrial and Engineering Chemistry Vol.41 No.-
A type of uniform ZnAl2O4 nanospheres was selectively synthesized via a facile solvothermalmethod andtheir size was controlled to be 320–450 nm in diameter. It exhibits excellent SO2 adsorption capacity. Both physical structure and surface basicity were determined to play important roles in SO2 adsorptionprocess. In situ FTIR investigation revealed that adsorbed SO2 molecules formed surface bisulfite, sulfite,and bidentate binuclear sulfate. The CO2-TPD results revealed the SO2 adsorption capacity of thecatalysts correlated closely with their basicity sites. The mechanisms for SO2 adsorption andtransformation have been discussed in detail.