吸附
化学工程
扩散
胺气处理
材料科学
动力学
相(物质)
再生(生物学)
化学
有机化学
热力学
量子力学
生物
细胞生物学
物理
工程类
作者
Xiaoyu Shi,Wen‐Chien Lu,Yichun Xue,Hang Zhou,Fei Xue,Hui He,Songlin Wang,Shuangfei Wang
标识
DOI:10.1016/j.cej.2021.130362
摘要
Thermo-responsive solid amine adsorbents are used for adsorption of CO2 in carbon capture and storage. They have a low temperature regeneration, but are incapable of high CO2 adsorption capacity because of the imbalance between the densities of the amino and thermo-responsive groups. Hence, a novel thermo-responsive hyperbranched intelligent nanofibre-based adsorbent was designed via cross-linking with a hyperbranched polyamine and a thermo-responsive intelligent nanofibre. The liquid–solid phase one-step rapid conversion used here balanced the high amino density (12.40 mmol g−1) with that of the synergistic groups (thermo-sensitive groups, 3.12 mmol g−1, and hydroxyl groups, 4.35 mmol g−1) of the adsorbent. A high-efficiency diffusion kinetics was maintained, and the conversion rate of the reactants reached 99%. An in situ variable-temperature characterisation and density functional theory (DFT) analysis were performed. The adsorbent possessed high CO2 adsorption capacity (6.23 mmol g−1) and ultra-low regeneration temperature (60 °C), the lowest regeneration temperature reported in the literature to date. These were attributed to the specialized and cooperative mechanism between amino, hydroxyl, and thermo-responsive groups of the adsorbent.
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