This paper presents an investigation of CO₂ capture ability of ordered carbon (CMK-3) composed of a two-dimensional hexagonal array of turbostratic carbon rods of 19.7 nm and 8.7 nm in diameter with interstitial mesopores and non-restricted micropores in the rods at atmospheric pressure. The CMK-3 carbon had a mesopore mean inner diameter of 3.42 nm and a microporous structure with modus of pore diameter of 1.30 nm. Despite the fact that the mesopores did not directly take part in CO₂ adsorption at atmospheric pressure, the carbon material exhibited good performance in CO₂ capture, adsorbing 1.70 mmol g⁻¹ and 1.07 mmol g⁻¹ in the micropores at 293 and 323 K, respectively. The open mesoporous channel structure with regular architecture provided easy accessibility of the micropores in the carbon walls that formed the structure of CMK-3 carbon. Enhancement of accessibility improved the molecular transport of CO_2, providing advantageous kinetics compared to purely microporous materials. The adsorption rate obtained from kinetics studies were decreasing with gas pressure increase in the system and were increasing with temperature increase. The ordered mesoporous-microporous carbon structure allowed excellent reversibility, regeneration ability and high selectivity of CO₂ over N₂ molecules.

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中文翻译：

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大气压下微孔对有序介孔 CMK-3 碳中 CO2 捕获的影响

本文介绍了有序碳 (CMK-3)的 CO ₂捕获能力的研究，该碳棒由直径为 19.7 nm 和 8.7 nm 的湍层碳棒二维六边形阵列组成，在棒中具有间隙中孔和非限制性微孔。气压。CMK-3 碳的中孔平均内径为 3.42 nm，微孔结构的孔径为 1.30 nm。尽管中孔在大气压下不直接参与CO ₂吸附，但碳材料在CO ₂捕获方面表现出良好的性能，吸附1.70 mmol g ^-1和1.07 mmol g ^-1分别在 293 和 323 K 的微孔中。具有规则结构的开放介孔通道结构使形成 CMK-3 碳结构的碳壁中的微孔易于接近。可及性的增强改善了 CO ₂的分子传输，与纯微孔材料相比提供了有利的动力学。从动力学研究中获得的吸附率随着系统中气体压力的增加而降低，并随着温度的升高而增加。有序的介孔-微孔碳结构允许优异的可逆性、再生能力和 CO ₂对 N ₂分子的高选择性。

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