Superior CO2 adsorption from waste coffee ground derived carbons. Issue 37 (26th March 2015)

• Record Type: Journal Article
• Authors: Travis, Will; Gadipelli, Srinivas; Guo, Zhengxiao
• Is Part Of: RSC advances. Volume 5:Issue 37(2015)
• Page Start: 29558
• Page End: 29562
• Publication Date: 2015-03-26
• Subjects: Chemistry -- Periodicals; 540.5
• DOI: 10.1039/c4ra13026j
• Languages: English
• ISSNs: 2046-2069

Abstract

Abstract : Utilising waste from spent coffee grounds KOH activated highly microporous carbons with surface areas of 2785 m 2 g −1 and micropore volumes of 0.793 cm 3 g −1 were synthesised that are capable of uptake capacities near 3 mmol g −1 at 50 °C and 1 bar. Abstract : Utilising the hugely abundant waste from spent coffee grounds (CGs), KOH activated highly microporous carbons with surface areas of 2785 m 2 g −1 and micropore volumes of 0.793 cm 3 g −1 were synthesised that are capable of uptake capacities near 3 mmol g −1 at 50 °C and 1 bar. Importantly such uptake capacities are achieved though the material's superior microporous character and without doping within the carbon matrix, thereby ensuring facile regeneration with a binding enthalpy of only 26 kJ mol −1 and therefore being capable of energy unintensive cycleable adsorption processes. Furthermore, excellent tunability of pore-size is demonstrated from narrow micropores through to narrow mesopores, enabling optimised adsorption over a range of pressures.