Wang Pengchen, Yao Lu, Pu Yijuan, Yang Lin, Jiang Xia, Jiang Wenju
College of Architecture and Environment, Sichuan University Chengdu 610065 P. R. China
National Engineering Research Center for Flue Gas Desulfurization Chengdu 610065 P. R. China.
RSC Adv. 2019 Nov 11;9(63):36658-36663. doi: 10.1039/c9ra08640d.
Ce-supported activated carbon-carbon nanotube composite (Ce/AC-CNTs) catalyst was prepared by formation of CNTs on AC and then modified by Ce. This Ce/AC-CNTs catalyst was subsequently used for low-temperature selective catalytic reduction of NO with NH (NH-SCR). The NO conversion of Ce/AC-CNTs was 1.41 times higher than that of Ce/AC at 150 °C with good SO tolerance. The catalysts were analyzed by N physisorption, SEM, XRD, NH-TPD, XPS, and Raman technologies. The results showed that the introduction of CNTs could form new mesopores and increase the amount of surface chemisorbed oxygen and acid sites, which all contribute to the high NH-SCR activity.
通过在活性炭（AC）上形成碳纳米管（CNTs），然后用铈（Ce）进行改性，制备了铈负载的活性炭-碳纳米管复合材料（Ce/AC-CNTs）催化剂。随后，将该Ce/AC-CNTs催化剂用于以氨（NH₃）进行的低温选择性催化还原NO（NH₃-SCR）。在150℃时，Ce/AC-CNTs的NO转化率比Ce/AC高1.41倍，并且具有良好的抗SO₂性能。采用N₂物理吸附、扫描电子显微镜（SEM）、X射线衍射（XRD）、NH₃程序升温脱附（NH₃-TPD）、X射线光电子能谱（XPS）和拉曼技术对催化剂进行了分析。结果表明，碳纳米管的引入可以形成新的中孔，并增加表面化学吸附氧和酸性位点的数量，这些都有助于提高NH₃-SCR活性。
