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

Title: Multicomponent Gas Storage in Organic Cage Molecules

Journal Article · · Journal of Physical Chemistry. C

Porous liquids are a promising new class of materials featuring nanoscale cavity units dispersed in liquids that are suitable for applications such as gas storage and separation. In this work, we use molecular dynamics simulations to examine the multicomponent gas storage in a porous liquid consisting of crown-ether-substituted cage molecules dissolved in a 15-crown-5 solvent. We compute the storage of three prototypical small molecules including CO2, CH4, and N2 and their binary mixtures in individual cage molecules. For porous liquids in equilibrium with a binary 1:1 gas mixture bath with partial gas pressure of 27.5 bar, a cage molecule shows a selectivity of 4.3 and 13.1 for the CO2/CH4 and CO2/N2 pairs, respectively. We provide a molecular perspective of how gas molecules are stored in the cage molecule and how the storage of one type of gas molecule is affected by other types of gas molecules. Finally, our results clarify the molecular mechanisms behind the selectivity of such cage molecules toward different gases.

Research Organization:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States); Energy Frontier Research Centers (EFRC) (United States). Center for Understanding and Control of Acid Gas-induced Evolution of Materials for Energy (UNCAGE-ME)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
AC05-00OR22725
OSTI ID:
1360658
Alternate ID(s):
OSTI ID: 1376400
Journal Information:
Journal of Physical Chemistry. C, Journal Name: Journal of Physical Chemistry. C; ISSN 1932-7447
Publisher:
American Chemical SocietyCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 14 works
Citation information provided by
Web of Science

References (31)

Solubilisation of dye-loaded zeolite L nanocrystals journal March 2006
Porous organic cages journal October 2009
Porous Liquids: A Promising Class of Media for Gas Separation journal November 2014
Carbon Dioxide's Liquid-Vapor Coexistence Curve And Critical Properties as Predicted by a Simple Molecular Model journal August 1995
Development and Testing of the OPLS All-Atom Force Field on Conformational Energetics and Properties of Organic Liquids journal January 1996
Designing and understanding permanent microporosity in liquids journal January 2014
Engineering Porous Organic Cage Crystals with Increased Acid Gas Resistance journal June 2016
Porous organic cages: soluble, modular and molecular pores journal July 2016
Thermodynamics and Kinetics of Gas Storage in Porous Liquids journal July 2016
GROMACS 4:  Algorithms for Highly Efficient, Load-Balanced, and Scalable Molecular Simulation journal February 2008
Solution-Processable Molecular Cage Micropores for Hierarchically Porous Materials journal August 2012
Molecular simulation of methane and butane in silicalite journal January 1991
Porous Organic Cage Compounds as Highly Potent Affinity Materials for Sensing by Quartz Crystal Microbalances journal September 2012
Understanding gas capacity, guest selectivity, and diffusion in porous liquids journal January 2017
Materials for electrochemical capacitors journal November 2008
Alkylated organic cages: from porous crystals to neat liquids journal January 2012
Porous organic molecules journal October 2010
Molecular simulation of adsorption of short linear alkanes and their mixtures in silicalite journal August 1998
Introduction to Metal–Organic Frameworks journal September 2011
Liquids with permanent porosity journal November 2015
Vapor–liquid equilibria of mixtures containing alkanes, carbon dioxide, and nitrogen journal July 2001
PACKMOL: A package for building initial configurations for molecular dynamics simulations journal October 2009
Liquefied molecular holes journal November 2015
Gas storage in soft 1D nano-tunnels by the induced fit of a serration structure journal January 2009
Design and synthesis of an exceptionally stable and highly porous metal-organic framework journal November 1999
Guest Transport in a Nonporous Organic Solid via Dynamic van der Waals Cooperativity journal November 2002
Analysis of adsorption selectivity in a one-dimensional model system journal October 1997
Periphery-Functionalized Porous Organic Cages journal October 2016
Comparative Molecular Simulation Study of CO 2 /N 2 and CH 4 /N 2 Separation in Zeolites and Metal−Organic Frameworks journal May 2009
Porous Liquids journal April 2007
Synthesis and Isolation of Cobalt Hexacyanoferrate/Chromate Metal Coordination Nanopolymers Stabilized by Alkylamino Ligand with Metal Elemental Control journal August 2004

Similar Records

Thermodynamics and kinetics of gas storage in porous liquids
Journal Article · Tue Jul 05 00:00:00 EDT 2016 · Journal of Physical Chemistry. B, Condensed Matter, Materials, Surfaces, Interfaces and Biophysical Chemistry · OSTI ID:1360658

CO2 SEPARATIONS USING ZEOLITE MEMBRANES
Technical Report · Sat Jun 30 00:00:00 EDT 2001 · OSTI ID:1360658

Design of enhanced porous organic cage solubility in Type 2 porous liquids
Journal Article · Sun Feb 26 00:00:00 EST 2023 · Journal of Molecular Liquids · OSTI ID:1360658