Hou Shiyu, Tang Yiliang, Zhu Tianle, Huang Zheng-Hong, Liu Yingshu, Sun Ye, Li Xiang, Shen Fangxia
School of Space and Environment, Beihang University, Beijing 100191, China.
School of Space and Environment, Beihang University, Beijing 100191, China.
J Hazard Mater. 2022 Aug 15;436:129208. doi: 10.1016/j.jhazmat.2022.129208. Epub 2022 May 25.
Adsorptive removal of gas phase low concentration macromolecular organic component, represented by naphthalene, from the enclosed space using ordered mesoporous carbon (OMC) has been studied by molecular simulation and experimental investigation. The simulation results indicated that both adsorption capacity and adsorption stability of the OMCs for naphthalene decreased with the increase of pore sizes from 2 nm to 8 nm. Characterizations showed that the prepared OMCs had the pore structure similar to the simulated OMCs except for the rough surface. In particular, the adsorption performance of the prepared OMCs was significantly lower than that of the simulated OMCs when pore size was 2 nm and 3 nm, which was attributed to the rough inner surface of these adsorbents, blocking the narrow pore channels and significantly reducing the pore volume. OMC with pore size of 4 nm had the highest adsorption amount for naphthalene. The co-adsorption experiments in the presence of both naphthalene and toluene, acetone or water showed the adsorption performance of OMCs for naphthalene were almost unaffected by the presence of low concentration toluene and acetone, as well as high relative humidity.
采用分子模拟和实验研究方法，研究了用有序介孔碳（OMC）从封闭空间中吸附去除以萘为代表的气相低浓度大分子有机成分。模拟结果表明，随着孔径从2nm增加到8nm，OMC对萘的吸附容量和吸附稳定性均降低。表征结果显示，除表面粗糙外，制备的OMC具有与模拟OMC相似的孔结构。特别是，当孔径为2nm和3nm时，制备的OMC的吸附性能明显低于模拟OMC，这归因于这些吸附剂的内表面粗糙，堵塞了狭窄的孔道并显著降低了孔体积。孔径为4nm的OMC对萘的吸附量最高。在萘与甲苯、丙酮或水共存的情况下进行的共吸附实验表明，低浓度甲苯和丙酮以及高相对湿度的存在几乎不影响OMC对萘的吸附性能。
