Adsorption of Methane Vapors on a Micro-Mesoporous Carbon Adsorbent During Long-Term Storage of Liquefied Natural Gas

IF 1.1 4区材料科学 Q3 METALLURGY & METALLURGICAL ENGINEERING Protection of Metals and Physical Chemistry of Surfaces Pub Date : 2023-11-24 DOI:10.1134/S2070205123700971

A. E. Grinchenko, I. E. Men’shchikov, A. V. Shkolin, A. A. Fomkin

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Abstract—The study investigated the physicochemical and adsorption characteristics of a micro-mesoporous carbon adsorbent obtained from wood waste by a thermochemical method with respect to the processes of the accumulation of liquefied natural gas vapors in long-term storage systems. X-ray diffraction analysis of the adsorbent showed that, as a result of synthesis of the adsorbent, its structure was an amorphous carbon phase, without signs of graphite-like phases characteristic of coal obtained from other types of raw materials. In turn, the developed porous structure of the adsorbent is represented by both micro- and mesopores, with a wide size distribution: the total pore volume was about 1.7 cm³/g. The sorption characteristics of the adsorbent at temperatures of 111.7–160 K and pressures up to 0.6 MPa were calculated based on the linearity of experimental isotherms at T from 303 to 333 K and the contribution from adsorption on the surface of mesopores in the monolayer and the capillary condensation effect (CCE). Based on sorption data, it is shown that the presence of mesopores has a predominant effect on the adsorption accumulation efficiency due to the contribution of CCE, providing an active capacity of cryogenic sorption accumulators at a level of 450 m³(NTP)/m³.

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液化天然气长期储存过程中甲烷蒸气在微介孔碳吸附剂上的吸附

摘要:研究了用热化学方法从木材废料中获得的微介孔碳吸附剂的物理化学和吸附特性，以及液化天然气蒸气在长期储存系统中的积累过程。对吸附剂的x射线衍射分析表明，由于该吸附剂的合成，其结构为无定形碳相，没有从其他原料中获得的煤所特有的石墨相的迹象。而吸附剂发育的孔隙结构以微孔和中孔为代表，孔径分布较广，总孔容约为1.7 cm3/g。根据实验等温线在温度为303 ~ 333 K范围内的线性关系、吸附在单层介孔表面的贡献以及毛细冷凝效应(CCE)，计算了吸附剂在温度为111.7 ~ 160 K和压力为0.6 MPa时的吸附特性。吸附数据表明，由于CCE的贡献，介孔的存在对吸附积累效率有主要影响，提供了450 m3(NTP)/m3水平的低温吸附蓄能器的有效容量。

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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.