Preparation of various manganese dioxide composites and their desulfurization performance
Preparation of various manganese dioxide composites and their desulfurization performance
复制标题
DOI：
10.1016/j.joei.2020.01.011
复制
发表时间：
2020-08-01
影响因子：
5.7
通讯作者：
Huang, Hongyu
中科院分区：
文献类型：
--
作者：
Li, Xing;Osaka, Yugo;Huang, Hongyu
脱硫材料的性能在脱硫技术中起着关键作用。本研究制备了不同类型的二氧化锰（MnO 2）复合材料以提高其脱硫性能。通过SEM、XRD、XPS、BET等手段对复合材料进行了表征。采用热重法（TG）测试了复合材料的脱硫性能，并对不同类型的复合材料的脱硫机理进行了研究。结果表明，MnO 2复合材料的脱硫性能是由材料的孔结构、比表面积、活性组分和Mn价态含量等因素综合影响的。高比表面积MnO_2和多孔MnO_2由于其优异的物理结构而提高了脱硫性能。碱金属添加剂LiOH掺杂MnO 2的脱硫性能通过活性组分的加入得到改善。MnO 2/CeO 2复合氧化物的脱硫性能是通过复合氧化物的协同作用而提高的。载体型MnO 2/NaY的脱硫性能通过MnO 2颗粒的分散得到改善。其中，多孔MnO 2的脱硫性能最好，在反应的第1 h内，其平均SO2捕获速率为0.283 g（SO2）/g（材料）·h，SO2捕获容量为0.633 g（SO2）/g（材料）. (C)2020由Elsevier Ltd代表能源研究所发布。
The performance of desulfurization materials plays a key role in desulfurization technology. In this study, different types of manganese dioxide (MnO2) composites were prepared to improve desulfurization performance. These composites were characterized intensively via SEM, XRD, XPS, and BET. Desulfurization performance was measured through thermogravimetry (TG), and the desulfurization mechanism of different types of MnO2 composite was investigated. Results showed that the desulfurization performances of MnO2 composites are determined by the combined effects of the materials' pore structure, specific surface area, active components and Mn valence contents. The desulfurization performances of high specific surface area MnO2 and porous MnO2 were enhanced on account of their excellent physical structures. The desulfurization performance of alkali metal additive LiOH doped MnO2 improved through the addition of active components. The desulfurization performance of bimetallic oxide MnO2/CeO2 improved through the synergistic effect of bimetallic oxides. The desulfurization performance of carrier type MnO2/NaY improved through the dispersion of MnO2 particles. Among the composites obtained, porous MnO2 revealed the best desulfurization performance, this composite demonstrated an average SO2 capture rate of 0.283 g(SO2)/g(material).h within the first hour of reaction, and its SO2 capture capacity was 0.633 g(SO2)/g(material). (C) 2020 Published by Elsevier Ltd on behalf of Energy Institute.