In this study, different commercial microfibrous fabric cloths were efficiently functionalized with polyethylenimine (PEI) and optimized with respect to amine loading for adsorptive removal of CO₂ from flue gas. The synthesized adsorbents were characterized by various techniques such as field emission scanning electron microscopy (FESEM), atomic force microscopy (AFM), Fourier transform infrared (FTIR) analysis, and tensile properties of the fabrics. The CO₂ adsorption capacities of amine-functionalized fabric sorbents were measured by using a thermogravimetric analyzer. It was found that an optimal PEI loading of 60 wt % on polyester-based fabric cloth (PEFC) resulted in the highest CO₂ adsorption capacity with the fastest kinetics while studying the effects of PEI loading and CO₂ partial pressures (in the range of 5–100 kPa) on CO₂ adsorption performance under atmospheric pressure. The equilibrium CO₂ adsorption capacities for 60 wt % PEI-loaded PEFC at 75 °C were 1.60 and 1.93 mmol CO₂/g sorbents in a 10% CO₂/N₂ gas mixture and pure CO₂, respectively. The multicycle temperature swing adsorption/desorption was also investigated using simulated flue gas in both dry and humid flue gas conditions, and it was observed that the working CO₂ uptake capacities after 15 cycles were 1.07 and 1.15 mmol of CO₂/g of sorbents. Moreover, the breakthrough performance study of the sorbents at three different flow rates using single- and double-layer bed configurations under 10% CO₂/N₂ flue gas stream at 75 °C and atmospheric pressure shows promising results. For a double-layer bed and under a volumetric gas flow of 100 mL/min, the adsorption capacity at the breakthrough and saturation points obtained was 0.50 and 0.84 mmol of CO₂/g of sorbents, respectively.

中文翻译：

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用于 CO2 捕获的低成本结构化吸附剂的简单合成、表征和性能研究


在这项研究中，不同的商业微纤维织物布用聚乙烯亚胺 （PEI） 进行了有效的功能化，并优化了胺负载，以吸附去除烟气中的 CO₂。通过场发射扫描电子显微镜 （FESEM）、原子力显微镜 （AFM）、傅里叶变换红外 （FTIR） 分析和织物拉伸性能等各种技术对合成的吸附剂进行了表征。使用热重分析仪测量胺功能化织物吸附剂的 CO₂ 吸附能力。研究 PEI 负载和 CO₂ 分压（在 5-100 kPa 范围内）对大气压下 CO₂ 吸附性能的影响时，发现聚酯基织物布 （PEFC） 上 60 wt % 的最佳 PEI 负载导致最高的 CO₂ 吸附容量和最快的动力学。在 75 °C 下，负载 60 wt % PEI 的 PEFC 在 10% CO₂/N₂ 气体混合物和纯 CO₂ 中的平衡 CO₂ 吸附容量分别为 1.60 和 1.93 mmol CO₂/g 吸附剂。在干燥和潮湿的烟气条件下，使用模拟烟气研究了多循环变温吸附/脱附，观察到 15 次循环后 CO₂ 的工作吸收能力为 1.07 和 1.15 mmol的 CO₂/g 吸附剂。此外，在 75 °C 和大气压下，使用 10% CO₂/N₂ 烟气流下，使用单层和双层床配置对吸附剂在三种不同流速下的突破性性能研究显示出有希望的结果。 对于双层床层和 100 mL/min 的体积气体流量，在获得突破点和饱和点的吸附容量分别为 0.50 和 0.84 mmol CO₂/g 吸附剂。