Biomass derived hierarchical porous carbon for high-performance O₂/N₂ adsorption; a new green self-activation approach

Abstract

Green porous carbon was synthesized by self-activation methodology with facile one-step carbonization from a walnut-shell precursor for air separation. The adsorption process behavior was surveyed using isotherm, kinetic and thermodynamic models.

Oxygen and nitrogen enriched pectin-derived micro-meso porous carbon for CO2 uptake

“…As a result, N-containing compounds improve performance in the presence of strong quadrupole interactions between CO 2 molecules and the surface. 53,64 As previously stated, narrow microporosity greatly affects CO 2 adsorption at 298 K and pressures up to 1 bar, and in many cases, a linear connection between equilibrium adsorption capacity and narrow micropore volume may be established. In this regard, it is worth noting that, while micropores are the most essential adsorption factors for CO 2 , associated meso and macropores are also significant for adsorption purposes since they usually contribute to the diffusion of the gas from the bulk carbon matrix.…”

Adsorption Equilibrium, Thermodynamic, and Kinetic Study of O2/N2/CO2 on Functionalized Granular Activated Carbon

“…Aspects like the loading rate and heating temperature do not appear to have much of an impact on the structure change, but characteristics like the structure’s eventual pH and how the pores connect (interconnected skeleton) are crucial in the gas adsorption. 18 …”

“… 2 , 14 − 17 CMS, carbon nanotubes, graphene, granular activated carbon (GAC), and fullerenes are examples of carbon-based adsorbents that are suitable for gas adsorption and are classified by shape, porosity, and structure. 18 − 23 …”

Green self-activating synthesis system for porous carbons: Celery biomass wastes as a typical case for CO2 uptake with kinetic, equilibrium and thermodynamic studies

“…Recently, a variety of solid physical adsorbents, such as fullerene (B40) [8], metal-organic frameworks (MOFs) [9], carbon nanotubes [10], zeolites [11], porous carbon (PC) [12], graphene [13], and others have been developed to substitute traditional alkanolamines [14]. Because of their exceptional characteristics, MOFs and porous carbons received much interest.…”