Coal tar pitch based nitrogen-doped porous carbons were developed by FeCl₃ activation for enhanced CO₂ capture. The carbon materials, synthesized with different FeCl₃/carbon precursor mass ratios and activation temperatures, exhibit high porosity, especially microporosity, and nitrogen species contents, leading to superior CO₂ adsorption capacities in the range of 3.71–4.58 mmol g^–1 and 5.68–7.18 mmol g^–1 at 25 and 0 °C under 1 bar, respectively. In particular, N-AC-600-2 and N-AC-600-3 materials show the highest uptakes of CO₂ at 25 and 0 °C, respectively, which rank among the best porous carbon sorbents. The nitrogen-doping and porosity of the fabricated carbons have combined impact on CO₂ adsorption. In addition, both excellent regenerability and high CO₂/N₂ selectivity were achieved, making these carbon materials promising candidates for large-scale CO₂ adsorption.

中文翻译：

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基于氮的煤焦油沥青基微孔碳，具有出色的CO ₂捕集性能

通过FeCl ₃活化开发了煤焦油沥青基氮掺杂多孔碳，以增强CO _2的捕获。以不同的FeCl ₃ /碳前体质量比和活化温度合成的碳材料具有高孔隙率，尤其是微孔率和氮含量，从而在3.71–4.58 mmol g ^–1和5.68的范围内具有出色的CO ₂吸附能力。–7.18 mmol g ^–1分别在25°C和0°C和1 bar下。特别是，N-AC-600-2和N-AC-600-3材料显示出最高的CO ₂吸收率分别在25°C和0°C的温度下，它们是最好的多孔碳吸附剂。所制造的碳的氮掺杂和孔隙率对CO ₂吸附具有综合影响。另外，获得了优异的可再生性和高的CO ₂ / N ₂选择性，使得这些碳材料成为大规模CO ₂吸附的有希望的候选者。