Zeolite Nanocrystals Embedded in Microcellular Carbon Foam as a High‐Performance CO2 Capture Adsorbent with Energy‐Saving Regeneration Properties. Issue 8 (26th February 2020)

• Record Type: Journal Article
• Authors: Mazaj, Matjaž; Bjelica, Milan; Žagar, Ema; Logar, Nataša Zabukovec; Kovačič, Sebastijan
• Is Part Of: ChemSusChem. Volume 13:Issue 8(2020)
• Page Start: 2089
• Page End: 2097
• Publication Date: 2020-02-26
• Subjects: carbon foams -- CO2 capture -- nanocomposites -- high internal phase emulsions -- zeolites; Green chemistry -- Periodicals; Sustainable engineering -- Periodicals; Chemistry -- Periodicals; Chemical engineering -- Periodicals; 660
• DOI: 10.1002/cssc.201903116
• Languages: English
• ISSNs: 1864-5631

Abstract

Abstract: Here, the facile synthesis of four‐length‐scaled (ultramicro‐micro‐meso‐macroporous) hierarchically structured porous carbon nanocomposite by an emulsion‐template strategy is reported. This previously unreported combination of zeolite nanocrystals embedded in the walls of microcellular carbon foams gives unique textural and structural properties, which result in their excellent ability to selectively capture CO2 owing to the presence of ultra‐micropores. The zeolite–microcellular carbon foam synergism delivers an adsorbent with a significantly enhanced CO2 capture capacity of up to 5 mmol g −1, CO2 /N2 selectivity of up to 80, and an outstanding multi‐cycle capture performance under humid conditions (70 % performance retention after 30 regeneration cycles). More impressively, the electrically conductive carbon framework enables Joule heating and cooling, and thus fast and energy‐efficient regeneration is possible, with an estimated energy consumption of only about 12 kWh. Abstract : Four scales in one foam : The facile synthesis of a four‐length‐scaled (ultramicro‐micro‐meso‐macroporous) hierarchically structured porous carbon nanocomposite by an emulsion‐template strategy is reported. The zeolite nanocrystals embedded in the walls of the microcellular carbon foams give unique textural and structural properties, which result in their excellent ability to selectively capture CO2 owing to the presence of ultra‐micropores.