Confined methanol within InOF-1: CO2 capture enhancement
Elí Sánchez-González1, Paulo G M Mileo, J Raziel Álvarez
1Laboratorio de Fisicoquímica y Reactividad de Superficies (LaFReS), Instituto de Investigaciones en Materiales, Universidad Nacional Autónoma de México, Circuito Exterior s/n, CU, Del. Coyoacán, 04510, Ciudad de México, Mexico. argel@unam.mx.
Abstract:
The CO2 capture performance of InOF-1 was optimised by confining small amounts of MeOH within its micropores (MeOH@InOF-1). In comparison with fully activated InOF-1, MeOH@InOF-1 shows a 1.30 and 4.88-fold increase in CO2 capture capacity for kinetic and static isothermal CO2 adsorption experiments respectively. Density functional theory calculations coupled with forcefield based-Monte Carlo simulations revealed that such an enhancement is assigned to an increase of the degree of confinement felt by the CO2 molecules resulting from the formation of a lump at the vicinity of the μ2-OH groups since MeOH strongly interacts with these adsorption sites and is thus highly localized in this region.
Insights
Confinement of methanol within InOF-1 micropores significantly enhances carbon dioxide (CO2) capture. This optimized material, MeOH@InOF-1, demonstrates a substantial increase in CO2 adsorption capacity compared to the activated material.
Area of Science:
- Materials Science
- Chemical Engineering
- Environmental Science
Background:
- Developing efficient carbon capture materials is crucial for mitigating climate change.
- Metal-organic frameworks (MOFs) show promise for CO2 adsorption.
- InOF-1 is a MOF with potential CO2 capture applications.
Purpose of the Study:
- To optimize the CO2 capture performance of InOF-1.
- To investigate the effect of methanol confinement on CO2 adsorption in InOF-1.
- To elucidate the mechanism behind the enhanced CO2 capture.
Main Methods:
- Synthesis and characterization of InOF-1.
- Preparation of methanol-confined InOF-1 (MeOH@InOF-1).
- Experimental CO2 adsorption isotherms (kinetic and static).
- Density Functional Theory (DFT) and Monte Carlo (MC) simulations.
Main Results:
- MeOH@InOF-1 exhibited a 1.30-fold increase in kinetic CO2 capture capacity.
- MeOH@InOF-1 showed a 4.88-fold increase in static CO2 capture capacity.
- Simulations revealed enhanced CO2 confinement due to methanol localized near μ2-OH groups.
Conclusions:
- Confinement of methanol within InOF-1 micropores significantly enhances CO2 capture.
- Methanol's strong interaction with adsorption sites leads to improved CO2 adsorption.
- MeOH@InOF-1 presents a promising strategy for efficient carbon capture technologies.
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