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Effect of Doped Alkali Metal Ions on the SO_(2) capture Performance of MnO_(2) Desulfurization Materials at Low Temperature

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Journal of Renewable Materials 2021年第9期9卷 1541-1553页

作者： Xing Li Yugo Osaka Hongyu Huang Takuya Tsujiguchi Akio Kodama Guangzhou Institute of Energy Conversion Chinese Academy of ScienceGuangzhou510640China School of Mechanical Engineering College of Science and EngineeringKanazawa UniversityKanazawa9201192Japan School of Mechanical and Power Engineering Nanjing Tech UniversityNanjing211800China

sulfur dioxide(SO_(2))emissions from diesel exhaust pose a serious threat to the environment and human ***,desulfurization technology and the performance of desulfurization materials must be *** this study,MnO_(2) was modified with various alkali metal ions using the impregnation method to enhance its SO_(2) capture *** composites were characterized intensively by scanning electron microscopy,energydispersive X-ray spectroscopy,X-ray diffraction spectroscopy,and Brunauer-Emmett-Teller *** SO_(2) capture performance of these composites were measured via thermogravimetry,and the effect of doping with alkali metal ions on the SO_(2) capture performance of MnO_(2) was *** showed that the SO_(2) capture performance of MnO_(2) could be enhanced by doping with alkali metal ions,and the MnO_(2) composite doped with LiOH(2.0 mol/L)had the best SO_(2) capture capacity(124 mgSO_(2)/gMaterial),which was 18%higher than that of pure MnO_(2).Moreover,the type and concentration of alkali metal ions had varying effects on the SO_(2) capture performance of MnO_(2).In our experiment,the SO_(2) capture performance of the MnO_(2) doped with NaOH,LiCl,Na2CO3,K2CO3,and Li2CO3 composites were worse than that of pure MnO_(2).Therefore,the influences of the type and concentration of alkali metal ions to be doped into desulfurization materials must be considered comprehensively.

关键词： sulfur dioxide capture desulfurization materials manganese dioxide alkali metal ions doped

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