Adsorption equilibrium of methane on activated carbon and typical metal organic frameworks

Q3 Energy 燃料化学学报 Pub Date : 2023-12-01 DOI:10.1016/S1872-5813(23)60364-0

Dong GUO, Shan-shan LI, Hu WANG, Qing-rong ZHENG

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Abstract

To develop adsorbents suitable for the storage of natural gas by adsorption, activated carbon SAC-02, HKUST-1 and MIL-101(Cr) were synthesized and characterized in terms of structural morphology observation, nitrogen physisorption at 77.15 K, and methane adsorption at 293.15–313.15 K and 0–4 MPa. The methane adsorption isotherms were comparatively correlated with the Toth, D-A and Ono-Kondo equations and the performances of the adsorbent samples were evaluated in terms of the isosteric adsorption heat and the adsorbed phase density. The results indicate that, in comparison with the D-A and Ono-Kondo equations, the Toth equation displays much smaller relative errors in correlating the methane adsorption data and is more suitable for the adsorption equilibrium analysis on the adsorbed natural gas (ANG) system. MIL-101(Cr) exhibits the largest mean isosteric heat for methane adsorption and the density of the adsorbed phase of methane is smaller than that of the liquid methane but increases with the equilibrium pressure; overall, MIL-101(Cr) with the highest adsorption capacity is more suitable for methane adsorption than activated carbon and HKUST-1.

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甲烷在活性炭和典型金属有机框架上的吸附平衡

为了开发适用于吸附储存天然气的吸附剂，合成了活性炭 SAC-02、HKUST-1 和 MIL-101(Cr)，并从结构形态观察、氮在 77.15 K 下的物理吸附以及甲烷在 293.15-313.15 K 和 0-4 MPa 下的吸附等方面对其进行了表征。甲烷吸附等温线与 Toth 方程、D-A 方程和 Ono-Kondo 方程进行了比较，并根据等效吸附热和吸附相密度评估了吸附剂样品的性能。结果表明，与 D-A 和 Ono-Kondo 方程相比，Toth 方程在关联甲烷吸附数据方面显示出更小的相对误差，更适用于吸附天然气 (ANG) 系统的吸附平衡分析。MIL-101(Cr)对甲烷吸附的平均等位热最大，甲烷吸附相的密度小于液态甲烷的密度，但随着平衡压力的增加而增加；总体而言，吸附容量最大的 MIL-101(Cr) 比活性炭和 HKUST-1 更适合吸附甲烷。

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来源期刊

燃料化学学报 Chemical Engineering-Chemical Engineering (all)

CiteScore

2.80

自引率

0.00%

发文量

5825

期刊介绍： Journal of Fuel Chemistry and Technology (Ranliao Huaxue Xuebao) is a Chinese Academy of Sciences(CAS) journal started in 1956, sponsored by the Chinese Chemical Society and the Institute of Coal Chemistry, Chinese Academy of Sciences(CAS). The journal is published bimonthly by Science Press in China and widely distributed in about 20 countries. Journal of Fuel Chemistry and Technology publishes reports of both basic and applied research in the chemistry and chemical engineering of many energy sources, including that involved in the nature, processing and utilization of coal, petroleum, oil shale, natural gas, biomass and synfuels, as well as related subjects of increasing interest such as C1 chemistry, pollutions control and new catalytic materials. Types of publications include original research articles, short communications, research notes and reviews. Both domestic and international contributors are welcome. Manuscripts written in Chinese or English will be accepted. Additional English titles, abstracts and key words should be included in Chinese manuscripts. All manuscripts are subject to critical review by the editorial committee, which is composed of about 10 foreign and 50 Chinese experts in fuel science. Journal of Fuel Chemistry and Technology has been a source of primary research work in fuel chemistry as a Chinese core scientific periodical.