N-Doped Carbon Nanotube-Reinforced N-Doped Mesoporous Carbon for Flue Gas Desulfurization
N-Doped Carbon Nanotube-Reinforced N-Doped Mesoporous Carbon for Flue Gas Desulfurization
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DOI：
10.1021/acs.iecr.7b04858
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发表时间：
2018-03-28
影响因子：
4.2
通讯作者：
Wang, Gang
中科院分区：
文献类型：
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作者：
Song, Xinyu;Ning, Guoqing;Wang, Gang
移动床反应器中用于烟气脱硫的碳吸附剂磨损严重，大大增加了运行成本，缩短了连续运行周期。在这里，我们提出了一种通过添加少量n掺杂碳纳米管（NCNTs）来增强n掺杂介孔碳（NMPCs）的新方法。与未掺杂的碳纳米管相比，NCNTs在溶剂中的分散性更好，与nmpc的界面结合能力增强，有效提高了NCNT-NMPC复合材料的机械强度。当NCNT添加量为0.1 wt %时，获得了最大的压裂强度和最佳的耐磨耗性。同时，NCNT-NMPC复合材料对SO2的平均吸附量为21.2 mg/g，比未掺杂的介孔碳高出84%。研究结果表明，N掺杂引入的缺陷位点有助于改善不同碳种之间的界面结合，制备的NCNT-NMPC复合材料是一种很有前途的高效烟气脱硫吸收剂。
The carbon adsorbents used for flue gas desulfurization in a moving bed reactor often suffer from serious abrasion loss, which has significantly increased the operation cost and reduced the continuous operating period. Here, we present a novel approach to reinforcing N-doped mesoporous carbons (NMPCs) by adding a small amount of N-doped carbon nanotubes (NCNTs). Compared to the undoped carbon nanotubes, the NCNTs exhibit better dispersibility in solvent and enhanced interface combination with NMPCs, which has efficiently enhanced the mechanical strength of the NCNT-NMPC composite materials. The largest fracturing strength and the best attrition resistance are obtained at a NCNT addition of 0.1 wt %. Meanwhile, the NCNT-NMPC composite delivers an average SO2 adsorption capacity of 21.2 mg/g, which is 84% higher than the undoped mesoporous carbon. Our results indicate that the defective sites introduced by N doping can help to improve the interface combination between different carbon species, and that the as-prepared NCNT-NMPC composite material is a promising high performance absorbent for flue gas desulfurization.