Skip to main content
U.S. Department of Energy
Office of Scientific and Technical Information

Design of Graphene/Ionic Liquid Composites for Carbon Capture

Journal Article · · ACS Applied Materials and Interfaces

Pore size is a crucial factor impacting gas separation in porous separation materials, but how to control the pore size to optimize the separation performance remains a challenge. Here, we propose a design of graphene/ionic liquid composites with tunable slit pore sizes, where cations and anions of ionic liquids are intercalated between graphene layers. By varying the sizes of the ions, we show from first-principles density functional theory calculations that the accessible pore size can be tuned from 3.4 to 6.0 Å. Grand canonical Monte Carlo simulations of gas sorption find that the composite materials possess high CO2 uptake at room temperature and 1 bar (up to ~8.5 mmol/g). Further simulations of the sorption of gas mixtures reveal that high CO2/N2 and CO2/CH4 adsorption selectivities can be obtained when the accessible pore size is <5 Å. This work suggests a new strategy to achieve tunable pore sizes via the graphene/IL composites for highly selective CO2/N2 and CO2/CH4 adsorption.

Research Organization:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES). Chemical Sciences, Geosciences & Biosciences Division
Grant/Contract Number:
AC05-00OR22725; AC02-05CH11231
OSTI ID:
1808178
Journal Information:
ACS Applied Materials and Interfaces, Journal Name: ACS Applied Materials and Interfaces Journal Issue: 15 Vol. 13; ISSN 1944-8244
Publisher:
American Chemical Society (ACS)Copyright Statement
Country of Publication:
United States
Language:
English

References (35)

Covalent Organic Frameworks for CO 2 Capture journal February 2016
Metal-Organic Frameworks for Separation journal March 2018
Synthesis of Ionic Ultramicroporous Polymers for Selective Separation of Acetylene from Ethylene journal June 2020
Tailoring the Pore Size and Chemistry of Ionic Ultramicroporous Polymers for Trace Sulfur Dioxide Capture with High Capacity and Selectivity journal February 2021
Carbon Dioxide Capture: Prospects for New Materials journal July 2010
Layer-by-Layer Films of Graphene and Ionic Liquids for Highly Selective Gas Sensing journal November 2010
Development and Evaluation of Porous Materials for Carbon Dioxide Separation and Capture journal October 2011
Biomass derived porous carbon for CO2 capture journal July 2019
Determination of the optimal pore size for improved CO2 adsorption in activated carbon fibers journal January 2013
Pore Space Partition in Metal–Organic Frameworks journal January 2017
Direct Capture of CO2 from Ambient Air journal August 2016
Development Trends in Porous Adsorbents for Carbon Capture journal October 2015
Optimal Size of a Cylindrical Pore for Post-Combustion CO 2 Capture journal September 2017
Molecular Resolution in situ Imaging of Spontaneous Graphene Exfoliation journal August 2016
Ion-Gated Gas Separation through Porous Graphene journal February 2017
Nanoporous Fluorinated Metal–Organic Framework-Based Membranes for CO 2 Capture journal June 2020
Anion Pillared Metal–Organic Framework Embedded with Molecular Rotors for Size-Selective Capture of CO 2 from CH 4 and N 2 journal January 2019
Post-Combustion CO2 Capture Using Solid Sorbents: A Review journal September 2011
DREIDING: a generic force field for molecular simulations journal December 1990
Made-to-order metal-organic frameworks for trace carbon dioxide removal and air capture journal June 2014
MOFs for CO 2 capture and separation from flue gas mixtures: the effect of multifunctional sites on their adsorption capacity and selectivity journal January 2013
Carbon capture and storage update journal January 2014
Recent advances in solid sorbents for CO 2 capture and new development trends journal January 2014
Carbon dioxide capture in amorphous porous organic polymers journal January 2017
When graphene meets ionic liquids: a good match for the design of functional materials journal January 2021
Direct exfoliation of natural graphite into micrometre size few layers graphene sheets using ionic liquids journal January 2010
Evaluating metal–organic frameworks for post-combustion carbon dioxide capture via temperature swing adsorption journal January 2011
Carbon capture with ionic liquids: overview and progress journal January 2012
Projector augmented-wave method journal December 1994
Efficient iterative schemes for ab initio total-energy calculations using a plane-wave basis set journal October 1996
Van der Waals density functionals applied to solids journal May 2011
Efficient Implementation of a van der Waals Density Functional: Application to Double-Wall Carbon Nanotubes journal August 2009
Generalized Gradient Approximation Made Simple journal October 1996
High-Throughput Synthesis of Zeolitic Imidazolate Frameworks and Application to CO2 Capture journal February 2008
Carbon Capture and Storage: How Green Can Black Be? journal September 2009

Similar Records

Ion-Gated Gas Separation through Porous Graphene
Journal Article · Wed Feb 22 23:00:00 EST 2017 · Nano Letters · OSTI ID:1348344

Continuously Tunable Pore Size for Gas Separation via a Bilayer Nanoporous Graphene Membrane
Journal Article · Mon Dec 17 23:00:00 EST 2018 · ACS Applied Nano Materials · OSTI ID:1846555