Li Yao, Xu Ran, Wang Xin, Wang Binbin, Cao Jianliang, Yang Juan, Wei Jianping
School of Safety Science and Engineering, Henan Polytechnic University Jiaozuo Henan 454000 China
State Key Laboratory Cultivation Base for Gas Geology and Gas Control, Henan Polytechnic University Jiaozuo 454000 China.
RSC Adv. 2018 May 30;8(35):19818-19826. doi: 10.1039/c8ra02701c. eCollection 2018 May 25.
The goal of this research is to develop a low-cost porous carbon adsorbent for selective CO capture. To obtain advanced adsorbents, it is critical to understand the synergetic effect of textural characteristics and surface functionality of the adsorbents for CO capture performance. Herein, we report a sustainable and scalable bio-inspired fabrication of nitrogen-doped hierarchical porous carbon by employing KOH chemical activation of waste wool. The optimal sample possesses a large surface area and a hierarchical porous structure, and exhibits good CO adsorption capacities of 2.78 mmol g and 3.72 mmol g at 25 °C and 0 °C, respectively, under 1 bar. Additionally, this sample also displays a moderate CO/N selectivity, an appropriate CO isosteric heat of adsorption and a stable cyclic ability. These multiple advantages combined with the low-cost of the raw material demonstrate that this sample is an excellent candidate as an adsorbent for CO capture.
本研究的目标是开发一种用于选择性捕获CO的低成本多孔碳吸附剂。为了获得先进的吸附剂，了解吸附剂的结构特征和表面功能对CO捕获性能的协同效应至关重要。在此，我们报告了一种可持续且可扩展的受生物启发的方法，通过用KOH对废羊毛进行化学活化来制备氮掺杂分级多孔碳。最佳样品具有大表面积和分级多孔结构，在1 bar压力下，于25°C和0°C时分别表现出2.78 mmol/g和3.72 mmol/g的良好CO吸附容量。此外，该样品还表现出适度的CO/N选择性、合适的CO等量吸附热和稳定的循环能力。这些多重优点与原材料的低成本相结合，表明该样品是用于CO捕获的吸附剂的极佳候选材料。
