Cashew nut shell biomass: A source for high-performance CO2/CH4 adsorption in activated carbon
Artikel i vetenskaplig tidskrift, 2024

This study embarks on the synthesis of activated carbon (AC) from cashew nut shells using a potassium carbonate (K2CO3) activation process, with a specific focus on its practical application in high-pressure gas adsorption. Among the synthesized samples, MCAK85 emerged as the most efficient, demonstrating a specific surface area of 1693 m2/g and total and micropore volumes of 0.839 cm3/g and 0.641 cm3/g, respectively. Importantly, this bioorganic activated carbon exhibited high sorption capacities for CO2 and CH4, with uptake values of 11.0 mmol/g and 5.5 mmol/g at 10 bar at 25°C, and a CO2/CH4 selectivity range between 9.1 and 1.8. A comprehensive range of characterization techniques were employed to analyze the structural and chemical properties of the synthesized AC, providing valuable insights into the functional groups and molecular structure. The morphology of the AC was examined using SEM, while the point of zero charge was determined to understand the surface charge characteristics. Additionally, TGA was utilized to assess the thermal stability and composition of the AC. This study underscores the potential of utilizing agricultural waste, specifically cashew nut shells, in the creation of effective materials for gas storage and purification applications. The high-pressure adsorption capacity of the produced AC, coupled with its sustainable and eco-friendly nature, underscores its suitability for environmental and industrial applications, particularly in areas focusing on greenhouse gas capture and air purification, thereby inspiring further research and development in this field.

Biomass waste

CO and CH adsorption 2 4

Activated carbon

Cashew nut shells

Gas selectivity

Chemical activation


Óscar Javier Fonseca-Bermúdez

Universidad de los Andes

Liliana Giraldo

Universidad Nacional de Colombia

Rocío Sierra-Ramírez

Universidad de los Andes

Jarosław Serafin

Institut de Nanociencia i Nanotecnologia

Universitat de Barcelona

Bartosz Dziejarski

Chalmers, Rymd-, geo- och miljövetenskap, Energiteknik

Politechnika Wrocławska

Marta Gil Bonillo

Universitat de Barcelona

Ghualm Farid

Institut de Nanociencia i Nanotecnologia

Universitat de Barcelona

Juan Carlos Moreno-Piraján

Universidad de los Andes

Journal of CO2 Utilization

22129820 (ISSN)

Vol. 83 102799





Mer information

Senast uppdaterat