With advances in porous carbon synthesis techniques, hierarchically porous carbon (HPC) materials are being utilized as relatively new sorbents for CO₂ capture applications. These HPC materials were used as a platform to prepare samples with differing textural properties and morphologies to elucidate structure–property relationships. It was found that high microporous content, rather than overall surface area, was of primary importance for predicting good CO₂ capture performance. Two HPC materials were analyzed, each with near identical high surface area (∼2700 m²/g) and colossally high pore volume (∼10 cm³/g), but with different microporous content and pore size distributions, which led to dramatically different CO₂ capture performance. Overall, large pore volumes obtained from distinct mesopores were found to significantly impact adsorption performance. From these results, an optimized HPC material was synthesized that achieved a high CO₂ capacity of ∼3.7 mmol/g at 25 °C and 1 bar.

中文翻译：

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用于捕获CO _2的分层多孔碳材料：孔结构的作用

随着多孔碳合成技术的进步，分层多孔碳（HPC）材料被用作用于CO ₂捕集应用的相对较新的吸附剂。这些HPC材料被用作制备具有不同纹理特性和形态的样品的平台，以阐明结构与特性之间的关系。发现高微孔含量而不是总表面积对于预测良好的CO ₂捕集性能至关重要。分析了两种HPC材料，每种材料的高表面积几乎相同（〜2700 m ² / g），孔体积非常大（〜10 cm ³ / g），但微孔含量和孔径分布不同，导致显着不同一氧化碳₂捕获性能。总体而言，发现从不同的中孔获得的大孔体积会显着影响吸附性能。根据这些结果，合成了一种优化的HPC材料，该材料在25°C和1 bar的压力下具有约3.7 mmol / g的高CO ₂容量。