Direct Sorption Capture of CO2 from Air

IF 0.8 4区材料科学 Q3 METALLURGY & METALLURGICAL ENGINEERING

Protection of Metals and Physical Chemistry of Surfaces Pub Date : 2026-02-06 DOI:10.1134/S2070205125701151

S. D. Artamonova, O. V. Solovtsova, I. E. Menshchikov, A. E. Grinchenko, S. A. Tikhonov, A. V. Shkolin, A. A. Fomkin

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Abstract

The adsorption behaviors of microporous carbon adsorbent ASK-1 with respect to CO₂ capture from the CO₂/N₂ mixtures were investigated at temperatures of 233, 273, and 313 K at pressures up to 1000 kPa. The activated carbon with the micropore pore volume of 0.53 cm³/g and the specific BET surface of 1440 m²/g was prepared from coal-tar raw materials of Kamchatka krai (Russia) by chemical activation using KOH at a temperature of 1173 K. The isotherms of one-component adsorption of gases were calculated using the Dubinin–Radushkevich equation of the theory of volume filling of micropores. The adsorption equilibrium of the СО₂/N₂ mixtures with the CO₂ content ranging from 0.05 to 20 mol % were calculated using the ideal adsorption solution applied to the isotherms of individual gases in order to evaluate the efficiency of the adsorbent for capturing CO₂, as well as to identify the optimal conditions for separating the СО₂/N₂ mixture. The availability of ASK-1 to purify air from technogenic CO₂ was determined by analyzing the adsorption behaviors of the components and estimating the potential CO₂ selectivity of the adsorbent as a function of the mixture composition, pressure, and temperature.

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直接吸附从空气中捕获二氧化碳

研究了微孔碳吸附剂ASK-1在温度为233、273和313 K、压力高达1000 kPa时对CO2/N2混合物中CO2的吸附行为。以俄罗斯堪察加边疆区煤焦油为原料，在1173 K的温度下，KOH化学活化制得微孔孔体积为0.53 cm3/g，比BET表面积为1440 m2/g的活性炭。利用微孔体积填充理论中的Dubinin-Radushkevich方程计算了气体的单组分吸附等温线。利用理想吸附溶液对各气体等温线的作用，计算了CO2含量在0.05 ~ 20 mol %范围内的СО2/N2混合物的吸附平衡，以评价吸附剂对CO2的吸附效率，并确定了分离СО2/N2混合物的最佳条件。通过分析组分的吸附行为和估计吸附剂的潜在CO2选择性作为混合物组成、压力和温度的函数，确定了ASK-1净化空气中技术CO2的有效性。

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来源期刊

Protection of Metals and Physical Chemistry of Surfaces 工程技术-冶金工程

CiteScore

1.90

自引率

18.20%

发文量

审稿时长

4-8 weeks

期刊介绍： Protection of Metals and Physical Chemistry of Surfaces is an international peer reviewed journal that publishes articles covering all aspects of the physical chemistry of materials and interfaces in various environments. The journal covers all related problems of modern physical chemistry and materials science, including: physicochemical processes at interfaces; adsorption phenomena; complexing from molecular and supramolecular structures at the interfaces to new substances, materials and coatings; nanoscale and nanostructured materials and coatings, composed and dispersed materials; physicochemical problems of corrosion, degradation and protection; investigation methods for surface and interface systems, processes, structures, materials and coatings. No principe restrictions exist related systems, types of processes, methods of control and study. The journal welcomes conceptual, theoretical, experimental, methodological, instrumental, environmental, and all other possible studies.