Liu Fa-Qian, Wang Lei, Huang Zhao-Ge, Li Chao-Qin, Li Wei, Li Rong-Xun, Li Wei-Hua
Engineering Research Center of High Performance Polymer and Molding Technology, Ministry of Education, and ‡College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology , Qingdao 266042, China.
ACS Appl Mater Interfaces. 2014 Mar 26;6(6):4371-81. doi: 10.1021/am500089g. Epub 2014 Mar 13.
New covalently tethered CO2 adsorbents are synthesized through the in situ polymerization of N-carboxyanhydride (NCA) of l-alanine from amine-functionalized three-dimensional (3D) interconnected macroporous silica (MPS). The interconnected macropores provide low-resistant pathways for the diffusion of CO2 molecules, while the abundant mesopores ensure the high pore volume. The adsorbents exhibit high molecular weight (of up to 13058 Da), high amine loading (more than 10.98 mmol N g(-1)), fast CO2 capture kinetics (t1/2 < 1 min), high adsorption capacity (of up to 3.86 mmol CO2 g(-1) in simulated flue gas and 2.65 mmol CO2 g(-1) in simulated ambient air under 1 atm of dry CO2), as well as good stability over 120 adsorption-desorption cycles, which allows the overall CO2 capture process to be promising and sustainable.
通过胺功能化的三维（3D）互连大孔二氧化硅（MPS）原位聚合L-丙氨酸的N-羧基酐（NCA），合成了新型共价连接的CO₂吸附剂。互连的大孔为CO₂分子的扩散提供了低阻力通道，而丰富的中孔确保了高孔容。这些吸附剂具有高分子量（高达13058 Da）、高胺负载量（超过10.98 mmol N g⁻¹）、快速的CO₂捕获动力学（t₁/₂ < 1分钟）、高吸附容量（在1个大气压的干燥CO₂下，模拟烟道气中高达3.86 mmol CO₂ g⁻¹，模拟环境空气中高达2.65 mmol CO₂ g⁻¹），以及在120次吸附-解吸循环中具有良好的稳定性，这使得整个CO₂捕获过程具有前景且可持续。
