High-Selective CO2 Capture in Amine-Decorated Al-MOFs

Yinji Wan; Yefan Miao; Ruiqin Zhong; Ruqiang Zou

doi:10.3390/nano12224056

High-Selective CO₂ Capture in Amine-Decorated Al-MOFs

Nanomaterials (Basel). 2022 Nov 17;12(22):4056. doi: 10.3390/nano12224056.

Authors

Yinji Wan¹, Yefan Miao¹, Ruiqin Zhong¹, Ruqiang Zou²

Affiliations

¹ State Key Laboratory of Heavy Oil Processing, China University of Petroleum, No. 18 Fuxue Road, Changping District, Beijing 102249, China.
² Beijing Key Laboratory for Theory and Technology of Advanced Battery Materials, School of Materials Science and Engineering, Peking University, No. 5 Yiheyuan Road, Haidian District, Beijing 100871, China.

Abstract

Amine-functionalized metal-organic framework (MOF) material is a promising CO₂ captor in the post-combustion capture process owing to its large CO₂ working capacity as well as high CO₂ selectivity and easy regeneration. In this study, an ethylenediamine (ED)-decorated Al-based MOFs (named ED@MOF-520) with a high specific area and permanent porosity are prepared and evaluated to study the adsorption and separation of CO₂ from N₂. The results show that ED@MOF-520 adsorbent displays a superior CO₂ capture performance with a CO₂/N₂ separation factor of 50 at 273 K, 185% times increase in the CO₂/N₂ separation efficiency in comparison with blank MOF-520. Furthermore, ED@MOF-520 exhibits a moderate-strength interaction with 29 kJ mol^-1 adsorption heat for CO₂ uptake, which not only meets the requirement of CO₂ adsorption but also has good cycle stability. This work provides a promising adsorbent with a high CO₂/N₂ separation factor to deal with carbon peak and carbon neutrality.

Keywords: CO2 capture and separation; CO2/N2 selectivity; MOF-520; amine-functionalized MOF-520.

Abstract

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