@Article{jrm.2021.015514,
AUTHOR = {Xing Li, Yugo Osaka, Hongyu Huang, Takuya Tsujiguchi, Akio Kodama},
TITLE = {Effect of Doped Alkali Metal Ions on the SO<sub>2</sub> Capture Performance of MnO<sub>2</sub> Desulfurization Materials at Low Temperature},
JOURNAL = {Journal of Renewable Materials},
VOLUME = {9},
YEAR = {2021},
NUMBER = {9},
PAGES = {1541--1553},
URL = {http://www.techscience.com/jrm/v9n9/42383},
ISSN = {2164-6341},
ABSTRACT = {Sulfur dioxide (SO<sub>2</sub>) emissions from diesel exhaust pose a serious threat to the environment and human health. Thus, desulfurization technology and the performance of desulfurization materials must be improved. In this study, MnO<sub>2</sub> was modified with various alkali metal ions using the impregnation method to enhance its SO<sub>2</sub> capture performance. The composites were characterized intensively by scanning electron microscopy, energy-dispersive X-ray spectroscopy, X-ray diffraction spectroscopy, and Brunauer-Emmett-Teller theory. The SO<sub>2</sub> capture performance of these composites were measured via thermogravimetry, and the effect of doping with alkali metal ions on the SO<sub>2</sub> capture performance of MnO<sub>2</sub> was investigated. Results showed that the SO<sub>2</sub> capture performance of MnO<sub>2</sub> could be enhanced by doping with alkali metal ions, and the MnO<sub>2</sub> composite doped with LiOH (2.0 mol/L) had the best SO<sub>2</sub> capture capacity (124 mg<sub>SO2</sub>/g<sub>Material</sub>), which was 18% higher than that of pure MnO<sub>2</sub>. Moreover, the type and concentration of alkali metal ions had varying effects on the SO<sub>2</sub> capture performance of MnO<sub>2</sub>. In our experiment, the SO<sub>2</sub> capture performance of the MnO<sub>2</sub> doped with NaOH, LiCl, Na<sub>2</sub>CO<sub>3</sub>, K<sub>2</sub>CO<sub>3</sub>, and Li<sub>2</sub>CO<sub>3</sub> composites were worse than that of pure MnO<sub>2</sub>. Therefore, the influences of the type and concentration of alkali metal ions to be doped into desulfurization materials must be considered comprehensively.},
DOI = {10.32604/jrm.2021.015514}
}