有氮掺杂介孔碳材料的CO_(2)吸附性能及其工程应用研究

Study on CO_(2)Adsorption Performance of Nitrogen-doped Mesoporous Carbon and Its Engineering Application

由于大气中CO_(2)浓度不断上升,研发高效的CO_(2)吸附材料至关重要。以酚醛树脂(Resol)为碳源,F127为软模板剂,二氰二胺为氮源,乙醇和水为混合溶剂,制备有氮掺杂的介孔碳材料。通过N2吸附/脱附、X射线衍射、傅里叶变换红外光谱、透射电子显微镜等方法分析材料的结构和形貌,并深入研究有氮掺杂介孔碳材料的CO_(2)吸附性能和吸附机理。结果表明,材料具有较大的表面积、高度有序的介观结构和较高的氮含量,对N2具有良好的选择性,且表现出卓越的CO_(2)吸附性能等特点。在25℃条件下,该材料的CO_(2)吸附量为2.87 mmol/g。以上海长江隧道为例,将该材料均匀涂抹在隧道表面,在隧道通车运营的情况下每天CO_(2)的累积吸附量可达55.88 kg。该研究成果可为城市隧道等基础设施实现减碳目标提供一种新的可行方案。

Due to the increasing CO_(2)concentration in the atmosphere,it is of great importance to develop efficient CO_(2)adsorptions.A nitrogen-doped mesoporous carbon material has been developed by using resol as carbon source,F127 as soft template,cyanoguanidine as the nitrogen source and ethyl alcohol and water as mixed solvents.The structure and form of the material are analyzed by using the methods such as N2 adsorption/desorption,X-ray diffraction,Fourier transform infrared spectroscopy and transmission electron microscope,and the CO_(2)adsorption performance and mechanism of nitrogen-doped mesoporous carbon are intensively investigated.According to the re⁃sults,the material has large surface area,highly ordered mesostructure and high nitrogen content,it exhibits excellent selectance of N2 and exhibits outstanding CO_(2)adsorption.Under 25℃temperature,the CO_(2)adsorption efficiency of this material is 2.87 mmol/g.In its application in the Yangtze River Tunnel of Shanghai,this material is evenly applied to the tunnel surface.When the tunnel is open to traffic,the total CO_(2)adsorption is 55.88 kg per day.The result of this study comes as a feasible solution for carbon reduction of the infrastructure including urban tunnels.