Zhang Hainan, Wang Zeming, Luo Xudong, Lu Jinlin, Peng Shengnan, Wang Yongfei, Han Lu
School of Materials and Metallurgy, University of Science and Technology Liaoning, Anshan, China.
School of Chemical and Processing Engineering, University of Leeds, Leeds, United Kingdom.
Front Chem. 2020 Jan 15;7:919. doi: 10.3389/fchem.2019.00919. eCollection 2019.
A high cost-performance carbon dioxide sorbent based on hierarchical porous carbons (HPCs) was easily prepared by carbonization of raw sugar using commercially available nano-CaCO as a double-acting template. The effects of the initial composition and carbonization temperature on the micro-mesoporous structure and adsorption performance were examined. Also, the importance of post-activation behavior in the development of micropores and synthesis route for the formation of the interconnected micro-mesoporous structure were investigated. The results revealed excellent carbon dioxide uptake reaching up 2.84 mmol/g (25C, 1 bar), with micropore surface area of 786 m/g, micropore volume of 0.320 cm/g and mesopore volume of 0.233 cm/g. We found that high carbon dioxide uptake was ascribed to the developed micropores and interconnected micro-mesoporous structure. As an expectation, the optimized HPCs offers a promising new support for the high selective capture of carbon dioxide in the future.
一种基于分级多孔碳（HPCs）的高性价比二氧化碳吸附剂，通过使用市售纳米碳酸钙作为双功能模板对原糖进行碳化可轻松制备。研究了初始组成和碳化温度对微介孔结构及吸附性能的影响。此外，还研究了后活化行为在微孔发展中的重要性以及形成相互连接的微介孔结构的合成路线。结果表明，该吸附剂在25℃、1巴条件下对二氧化碳的吸附量高达2.84 mmol/g，微孔表面积为786 m²/g，微孔体积为0.320 cm³/g，介孔体积为0.233 cm³/g。我们发现高二氧化碳吸附量归因于发达的微孔和相互连接的微介孔结构。预期优化后的HPCs未来可为高选择性捕获二氧化碳提供一种有前景的新载体。
