Experimental Study on Catalytic Reduction of SO2 by Rare Earth Compound in the Presence of Oxygen

2019 2nd International Conference of Green Buildings and Environmental Management

生态环境科学

Du, Zhehua^1 ; Lin, Xin^2

Wuhan Second Ship Design and Research Institute, Wuhan, Hubei

430205, China^1

Hubei Province Engineering Consulting Co. LTD., Wuhan, Hubei

430071, China^2

关键词: Catalytic reduction;    Desulphurization;    Elemental sulfur;    Oxygen resistance;    Poisoning effects;    Rare earth oxide;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/310/4/042024/pdf
DOI  :  10.1088/1755-1315/310/4/042024

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

Compared with a great deal of traditional desulphurization crafts, the catalytic reduction of SO2 with CO to elemental sulfur is considered to be the best technology for the removal of CO2 from flue gas. Adding rare earth oxide CeO2 with variable valences to La2O3formes a mixture of rare earth oxides. By means of dipping CeO2, La2O3 and their mixture, whose carriers are allγ-Al2O3, are used as the catalyst for the reduction of CO2 by CO. Under the condition of oxygen, all kinds of catalyst will be poisoned to some extent. However, the oxygen resistance of the catalyst can be improved by changing the composition of the catalyst. It is found through experiments that this poisoning effect is partially reversible. The structure of the catalyst is not completely destroyed. There is still a great distance from the actual application.