Study on Sulfation of CeO_2/γ-Al_2O_3 Sorbent in Simulated Flue Gas  

作　　者：郁青春 张世超 王新东 张杰 卢振明 

机构地区：[1]Department of Physical Chemistry, University of Science and Technology Beijing [2]School of Material Science and Engineering, Beijing University of Aeronautics and Astronautics [3]Institute of Nuclear and Energy Technology, Tsinghua University

出　　处：《Journal of Rare Earths》2007年第2期184-188,共5页稀土学报（英文版）

基　　金：Project supported bythe National Natural Science Foundation of China (90210003) ;Natural Science Foundation of Bei-jing City (2012010)

摘　　要：The sulfation of CeO2/γ-Al2O3 sorbent in simulated flue gas was studied. A series of CeO2/γ-Al2O3 sorbents with different CeO2 loadings were prepared by impregnation and characterized by X-ray diffraction. Thermogravimetric technique was used to study the sulfation of CeO2/γ-Al2O3 sorbents, mainly on the CeO2 loading, sulfation cycles, and intrinsic kinetics. The study revealed that monolayer coverage of CeO2 supported on γ-Al2O3 was 0. 125 g CeO2/g （γ-Al2O3）. Below monolayer coverage, CeO2 was highly dispersed on γ-Al2O3. The optimal CeO2 loading on sulfation was 0.03 g CeO2/g （γ-Al2O3）. CeO2/γ-Al2O3 sorbent was recyclable by controlling sulfation time. Intrinsic kineticd equation was R = 1. 1394×10^-4×exp （ - 1,508.39/T） mg·mg^-1·s^-1 Activation energy and reaction order were 12.54 kJ·mol^-1 and first order, respectively.The sulfation of CeO2/γ-Al2O3 sorbent in simulated flue gas was studied. A series of CeO2/γ-Al2O3 sorbents with different CeO2 loadings were prepared by impregnation and characterized by X-ray diffraction. Thermogravimetric technique was used to study the sulfation of CeO2/γ-Al2O3 sorbents, mainly on the CeO2 loading, sulfation cycles, and intrinsic kinetics. The study revealed that monolayer coverage of CeO2 supported on γ-Al2O3 was 0. 125 g CeO2/g （γ-Al2O3）. Below monolayer coverage, CeO2 was highly dispersed on γ-Al2O3. The optimal CeO2 loading on sulfation was 0.03 g CeO2/g （γ-Al2O3）. CeO2/γ-Al2O3 sorbent was recyclable by controlling sulfation time. Intrinsic kineticd equation was R = 1. 1394×10^-4×exp （ - 1,508.39/T） mg·mg^-1·s^-1 Activation energy and reaction order were 12.54 kJ·mol^-1 and first order, respectively.

关 键 词：CeO2/γ-Al2O3 SO2 intrinsic kinetics RECYCLABLE rare earths 

分 类 号：X701[环境科学与工程—环境工程]