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

Title: Integrated Solvent Design for CO2 Capture and Viscosity Tuning

Journal Article · · Energy Procedia (Online)

We present novel design strategies for reduced viscosity single-component, water-lean CO2 capture organic solvent systems. Through molecular simulation, we identify the main molecular-level descriptor that influences bulk solvent viscosity. Upon loading, a zwitterionic structure forms with a small activation energy of ca 16 kJ/mol and a small stabilization of ca 6 kJ/mol. Viscosity increases exponentially with CO2 loading due to hydrogen-bonding between neighboring Zwitterions. We find that molecular structures that promote internal hydrogen bonding (within the same molecule) and suppress interactions with neighboring molecules have low viscosities. In addition, tuning the acid/base properties leads to a shift of the equilibrium toward a non-charged (acid) form that further reduces the viscosity. Here, based on the above structural criteria, a reduced order model is also presented that allows for the quick screening of large compound libraries and down selection of promising candidates for synthesis and testing.

Research Organization:
Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
Sponsoring Organization:
USDOE
Grant/Contract Number:
AC05-76RL01830
OSTI ID:
1398166
Report Number(s):
PNNL-SA-121494; AA6510000
Journal Information:
Energy Procedia (Online), Vol. 114, Issue C; ISSN 1876-6102
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 9 works
Citation information provided by
Web of Science

References (33)

Techno-economic analysis of natural gas combined cycles with post-combustion CO2 absorption, including a detailed evaluation of the development potential journal October 2007
Amine Scrubbing for CO2 Capture journal September 2009
CO2 Capture by a Task-Specific Ionic Liquid journal February 2002
Properties of Alkylimidazoles as Solvents for CO 2 Capture and Comparisons to Imidazolium-Based Ionic Liquids journal July 2011
One-component, switchable ionic liquids derived from siloxylated amines journal January 2009
Aminosilicone Solvents for CO2 Capture journal August 2010
Amino Disiloxanes for CO 2 Capture journal April 2011
CO 2 Capture Using Solutions of Alkanolamines and Aminosilicones journal March 2012
Secondary Amine Functional Disiloxanes as CO 2 Sorbents journal April 2014
Single component, reversible ionic liquids for energy applications journal June 2010
Reversible ionic liquids designed for facile separations journal July 2010
The Synthesis and the Chemical and Physical Properties of Non-Aqueous Silylamine Solvents for Carbon Dioxide Capture journal August 2012
Reversible Ionic Liquid Stabilized Carbamic Acids: A Pathway Toward Enhanced CO2 Capture
  • Switzer, Jackson R.; Ethier, Amy L.; Flack, Kyle M.
  • Industrial & Engineering Chemistry Research, Vol. 52, Issue 36, p. 13159-13163 https://doi.org/10.1021/ie4018836
journal August 2013
Design, Synthesis, and Evaluation of Nonaqueous Silylamines for Efficient CO 2 Capture journal November 2013
Molecular Design of High Capacity, Low Viscosity, Chemically Tunable Ionic Liquids for CO2 Capture journal December 2010
Structure and Dynamics of Neat and CO 2 -Reacted Ionic Liquid Tetrabutylphosphonium 2-Cyanopyrrolide journal August 2011
Physical Properties and CO 2 Reaction Pathway of 1-Ethyl-3-Methylimidazolium Ionic Liquids with Aprotic Heterocyclic Anions journal December 2014
Green chemistry: Reversible nonpolar-to-polar solvent journal August 2005
Low viscosity alkanolguanidine and alkanolamidine liquids for CO 2 capture journal January 2013
Improving the regeneration of CO2-binding organic liquids with a polarity change journal January 2013
Measuring the Absorption Rate of CO 2 in Nonaqueous CO 2 -Binding Organic Liquid Solvents with a Wetted-Wall Apparatus journal September 2015
Dynamic Acid/Base Equilibrium in Single Component Switchable Ionic Liquids and Consequences on Viscosity journal April 2016
Structure–property reduced order model for viscosity prediction in single-component CO 2 -binding organic liquids journal January 2016
A new local density functional for main-group thermochemistry, transition metal bonding, thermochemical kinetics, and noncovalent interactions journal November 2006
Quantum Mechanical Continuum Solvation Models journal August 2005
Quickstep: Fast and accurate density functional calculations using a mixed Gaussian and plane waves approach journal April 2005
A hybrid Gaussian and plane wave density functional scheme journal October 1997
Constrained reaction coordinate dynamics for the simulation of rare events journal April 1989
Escaping free-energy minima journal September 2002
GROMACS: Fast, flexible, and free journal January 2005
Development and Testing of the OPLS All-Atom Force Field on Conformational Energetics and Properties of Organic Liquids journal January 1996
Time-Correlation Functions and Transport Coefficients in Statistical Mechanics journal October 1965
Determining the shear viscosity of model liquids from molecular dynamics simulations journal January 2002

Cited By (1)


Similar Records

Directed Hydrogen Bond Placement: Low Viscosity Amine Solvents for CO2 Capture
Journal Article · Fri Mar 15 00:00:00 EDT 2019 · ACS Sustainable Chemistry & Engineering · OSTI ID:1398166

Dynamic acid/base equilibrium in single component switchable ionic liquids and consequences on viscosity
Journal Article · Mon Mar 28 00:00:00 EDT 2016 · Journal of Physical Chemistry Letters · OSTI ID:1398166

Directed Hydrogen Bond Placement: Low Viscosity Amine Solvents for CO2 Capture
Journal Article · Mon Apr 15 00:00:00 EDT 2019 · ACS Sustainable Chemistry & Engineering · OSTI ID:1398166