Development of ultramicropore-mesopore interconnected pore architectures for boosting carbon dioxide capture at low partial pressure. (15th June 2022)

• Record Type: Journal Article
• Authors: Liu, Baogen; Ma, Xiancheng; Wei, Da; Yang, Yahui; Zeng, Zheng; Li, Liqing
• Is Part Of: Carbon. Volume 192(2022)
• Page Start: 41
• Page End: 49
• Publication Date: 2022-06-15
• Subjects: CO2 capture -- Adsorption -- Pore structure -- Ultramicropore -- Mesopore; Carbon -- Periodicals; Carbone -- Périodiques; Koolstof; Toepassingen; Electronic journals; 546.681
• DOI: 10.1016/j.carbon.2022.02.028
• Languages: English
• ISSNs: 0008-6223

Abstract

Abstract: The physical adsorption of carbon dioxide (CO2 ) using porous solid adsorbent is greatly hindered by high temperature and low pressure, resulting in a decrease in capture performance in terms of capacity, selectivity, and kinetics. Here we report an effective synthesis of 3D hierarchical porous carbon with ultramicropore-mesopore interconnected pore architectures that are able to boost the CO2 adsorption at elevated temperature and low partial pressure. This unique pore structure is benefit from the uniform introduction of a combination of alkali metals (Li, Na, K) and other metals (Mg, Ca, Zn) in the resin precursor. Specifically, the employed dual metal in-situ activation method allows generation of extensive mesopores with pore size in the range of 3–5 and 7–9 nm without sacrificing distribution of ultramicropore. These properties result in an enhanced dynamic CO2 capacity from 1.36 to 1.54 mmol/g (40 °C and 0.15 bar), higher CO2 /N2 selectivity from 73 to 85 as well as advanced mass transport kinetics. This work paves the way for the development of high-performance CO2 adsorbent at low partial pressure and provides a strategy to prepare interconnected pore architectures for a variety of potential adsorption application. Graphical abstract: Image 1