College of Chemistry and Life Sciences, Zhejiang Normal University, 688 Yingbin Ave., Jinhua 321004, PR China.
Department of Pediatric Surgery, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou 325000, PR China.
J Colloid Interface Sci. 2018 Feb 1;511:259-267. doi: 10.1016/j.jcis.2017.09.040. Epub 2017 Sep 8.
This article reports on the synthesis and characterization of porous nitrogen-doped carbons synthesized by carbonization of coconut shell followed by urea modification and KCO activation. The as-synthesized samples were carefully characterized by various techniques. This series of samples demonstrate high CO uptake at 1bar, up to 3.71mmol/g at 25°C in addition to 5.12mmol/g at 0°C. Furthermore, these sorbents possess fast CO adsorption kinetics, stable reusability, moderate heat of CO adsorption, reasonable CO/N selectivity, and high dynamic CO capture capacity under simulated flue gas conditions. It is found that, in addition to nitrogen content and narrow micropore volume, the pore size distribution of narrow micropore also plays a major role in determining the CO capture capacity under ambient condition. This work is intended to provide useful information and to inspire ways to develop new carbonaceous sorbents for removing CO from combustion flue gas.
本文报道了通过椰壳碳化、尿素改性和 KCO 活化合成多孔氮掺杂碳的合成与表征。所合成的样品通过各种技术进行了仔细的表征。该系列样品在 1bar 下具有高的 CO 吸收量，在 25°C 时高达 3.71mmol/g，在 0°C 时高达 5.12mmol/g。此外，这些吸附剂具有快速的 CO 吸附动力学、稳定的可重复使用性、适中的 CO 吸附热、合理的 CO/N 选择性以及在模拟烟道气条件下高的动态 CO 捕获容量。研究发现，除了氮含量和窄微孔体积外，窄微孔的孔径分布也在很大程度上决定了在环境条件下的 CO 捕获能力。这项工作旨在提供有用的信息，并启发开发用于从燃烧烟道气中去除 CO 的新型碳质吸附剂的方法。
