skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Optimal Size of a Cylindrical Pore for Post-Combustion CO2 Capture

Journal Article · · Journal of Physical Chemistry. C

Pore size is an essential factor in controlling gas sorption in porous separation media. The overlap of the potential energy surface (PES) of CO2 interacting with a cylindrical pore wall can be used to tune gas sorption inside a porous material, but how such overlap can benefit post-combustion CO2 capture has not been fully addressed from a computational perspective. Here we use van der Waals density functional (vdW-DF) theory to assess the overlap of PES of CO2 inside cylindrical pores as represented by carbon nanotubes (CNTs) of different diameters. Then we employ grand-canonical Monte Carlo simulations to obtain the adsorption capacity and selectivity of a CO2/N2 mixture with a CO2 partial pressure of 0.15 bar at room temperature. We find that the maximum PES overlap and maximum amount of CO2 adsorbed are both achieved at a CNT diameter or cylindrical pore size of 7.8 Å, which corresponds to an accessible pore size of 4.4 Å. A further investigation of N2 adsorption corroborates the idea of PES overlap. GCMC simulations reveal that a maximum CO2/N2 selectivity of ~33 is reached at a CNT diameter of 7.05 Å for the gas mixture. This work suggests that a cylindrical pore size between 7 and 8 Å would be most beneficial for post-combustion CO2 capture from overlap of PES.

Research Organization:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). National Energy Research Scientific Computing Center (NERSC)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES). Chemical Sciences, Geosciences, and Biosciences Division
Grant/Contract Number:
AC05-00OR22725; AC02-05CH11231
OSTI ID:
1462884
Alternate ID(s):
OSTI ID: 1480502
Journal Information:
Journal of Physical Chemistry. C, Vol. 121, Issue 40; ISSN 1932-7447
Publisher:
American Chemical SocietyCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 6 works
Citation information provided by
Web of Science

References (52)

Carbon Dioxide Capture: Prospects for New Materials journal July 2010
Carbon capture with ionic liquids: overview and progress journal January 2012
Post-Combustion CO2 Capture Using Solid Sorbents: A Review journal September 2011
Postcombustion CO 2 Capture in Functionalized Porous Coordination Networks journal December 2013
Carbon Capture and Storage: How Green Can Black Be? journal September 2009
Carbon Dioxide Capture Adsorbents: Chemistry and Methods journal March 2017
Recent advances in solid sorbents for CO 2 capture and new development trends journal January 2014
Substitution Effect Guided Synthesis of Task-Specific Nanoporous Polycarbazoles with Enhanced Carbon Capture journal July 2016
What can molecular simulation do for global warming? journal January 2016
Importance of Micropore-Mesopore Interfaces in Carbon Dioxide Capture by Carbon-Based Materials journal June 2016
Porous Aromatic Frameworks Impregnated with Lithiated Fullerenes for Natural Gas Purification journal April 2015
Adsorbent Materials for Carbon Dioxide Capture from Large Anthropogenic Point Sources journal September 2009
Carbon Dioxide Capture in Metal–Organic Frameworks journal September 2011
Capture of Carbon Dioxide from Air and Flue Gas in the Alkylamine-Appended Metal–Organic Framework mmen-Mg2(dobpdc) journal April 2012
Metal–Organic Frameworks as Platforms for Functional Materials journal February 2016
Metal–Organic Frameworks as A Tunable Platform for Designing Functional Molecular Materials journal August 2013
Metal−Organic Frameworks with Exceptionally High Capacity for Storage of Carbon Dioxide at Room Temperature journal December 2005
An ultra-tunable platform for molecular engineering of high-performance crystalline porous materials journal December 2016
Systematic and Dramatic Tuning on Gas Sorption Performance in Heterometallic Metal–Organic Frameworks journal February 2016
Design of Pore Size and Functionality in Pillar-Layered Zn-Triazolate-Dicarboxylate Frameworks and Their High CO 2 /CH 4 and C2 Hydrocarbons/CH 4 Selectivity journal October 2015
CO 2 Adsorption in Azobenzene Functionalized Stimuli Responsive Metal–Organic Frameworks journal July 2016
Computational and Experimental Studies on the Adsorption of CO, N 2 , and CO 2 on Mg-MOF-74 journal June 2010
CO 2 capture and conversion using Mg-MOF-74 prepared by a sonochemical method journal January 2012
Water Effects on Postcombustion CO 2 Capture in Mg-MOF-74 journal February 2013
Covalent Organic Frameworks for CO 2 Capture journal February 2016
Two-Dimensional Covalent Organic Frameworks for Carbon Dioxide Capture through Channel-Wall Functionalization journal January 2015
Tailor-Made Pore Surface Engineering in Covalent Organic Frameworks: Systematic Functionalization for Performance Screening journal June 2015
Tunable Water and CO 2 Sorption Properties in Isostructural Azine-Based Covalent Organic Frameworks through Polarity Engineering journal November 2015
Investigation of Ester- and Amide-Linker-Based Porous Organic Polymers for Carbon Dioxide Capture and Separation at Wide Temperatures and Pressures journal August 2016
Tuning MOF CO 2 Adsorption Properties via Cation Exchange journal April 2010
Development and Evaluation of Porous Materials for Carbon Dioxide Separation and Capture journal October 2011
Expanded Porphyrins as Two-Dimensional Porous Membranes for CO 2 Separation journal March 2015
Diffusion and Separation of H 2 , CH 4 , CO 2 , and N 2 in Diamond-Like Frameworks journal March 2015
Adsorption and selectivity of CH 4 /CO 2 in functional group rich organic shales journal March 2017
Direct Air Capture of CO 2 by Physisorbent Materials journal October 2015
Made-to-order metal-organic frameworks for trace carbon dioxide removal and air capture journal June 2014
Porous materials with optimal adsorption thermodynamics and kinetics for CO2 separation journal February 2013
Computational Analysis of Pressure-Dependent Optimal Pore Size for CO 2 Capture with Graphitic Surfaces journal February 2016
Understanding Carbon Dioxide Adsorption in Carbon Nanotube Arrays: Molecular Simulation and Adsorption Measurements journal June 2013
Adsorption and separation of binary and ternary mixtures of SO 2 , CO 2 and N 2 by ordered carbon nanotube arrays: grand-canonical Monte Carlo simulations journal January 2016
Single-Walled Carbon Nanotubes:  Efficient Nanomaterials for Separation and On-Board Vehicle Storage of Hydrogen and Methane Mixture at Room Temperature? journal April 2007
Van der Waals Density Functional for General Geometries journal June 2004
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
Projector augmented-wave method journal December 1994
Insights into CO2/N2 separation through nanoporous graphene from molecular dynamics journal January 2013
Simulation Study on the Adsorption Properties of Linear Alkanes on Closed Nanotube Bundles journal August 2012
Optimal Activation of Porous Carbon for High Performance CO 2 Capture journal May 2016
Adsorption Equilibria of CO 2 on Zeolite 13X and Zeolite X/Activated Carbon Composite journal September 2002
Evaluation of dual-bed pressure swing adsorption for CO2 recovery from boiler exhaust gas journal September 2001

Cited By (1)

CO 2 and SO 2 Pressure-Driven Adsorption by 3D Graphene Nanoslits: A Molecular Dynamics Study journal April 2019

Similar Records

Highly Selective H2 Separation Zeolite Membranes for Coal Gasification Membrane Reactor Applications
Technical Report · Mon Sep 24 00:00:00 EDT 2007 · OSTI ID:1462884

Hydrophobic and moisture-stable metal–organic frameworks
Journal Article · Sat Aug 15 00:00:00 EDT 2015 · Dalton Transactions, 44(30):13490 - 13497 · OSTI ID:1462884

The Coal-Seq III Consortium. Advancing the Science of CO2 Sequestration in Coal Seam and Gas Shale Reservoirs
Technical Report · Fri Mar 14 00:00:00 EDT 2014 · OSTI ID:1462884