Abstract
We present here an overview of water-lean solvents that compares their projected costs and performance to aqueous amine systems, emphasizing critical areas of study needed to evaluate their performance against their water-based brethren. The work presented here focuses on bridging these knowledge gaps. Because the majority of water-lean solvents are still at the lab scale, substantial studies are still needed to model and assess their performance at full scales. This presents a significant challenge as each formulation has different physical and thermodynamic properties and behavior, and quantifying how these different properties manifest themselves in conventional absorber-stripper configurations, or identifying new configurations that are specific for a solvent's signature behavior. We identify critical areas of study that are needed, and our efforts (e.g. custom infrastructure, molecular models) to predict, measure, and model these behaviors. Such findings are critical for determining the rheology required for heat exchanger design; absorber designs and packing to accommodate solvents with gradient changes (e.g. viscosity, contact angle, surface tension), and stripper configurations without direct steam utilization or water reflux. Another critical area of research need is to understand the molecular structure of the liquid interface and bulk as a function of CO2 loading, and to assess whether conventional film theories accurately quantify solvent behavior, or if thermodynamic models adequately quantify activity coefficients of ions in solution. We conclude with an assessment of our efforts to aid in bridging the knowledge gaps in understanding water-lean solvents, and suggestions of what is needed to enable large-scale demonstrations to meet the United States Department of Energy's goals. Published by Elsevier Ltd.
| Original language | English |
|---|---|
| Pages (from-to) | 756-763 |
| Number of pages | 8 |
| Journal | Energy Procedia |
| Volume | 114 |
| DOIs | |
| Publication status | Published - Jan 1 2017 |
| Event | 13th International Conference on Greenhouse Gas Control Technologies, GHGT 2016 - Lausanne, Switzerland Duration: Nov 14 2016 → Nov 18 2016 |
Fingerprint
Keywords
- CO capture
- COBOL
- water-lean solvent
ASJC Scopus subject areas
- Energy(all)
Cite this
Are Water-lean Solvent Systems Viable for Post-Combustion CO2 Capture? / Heldebrant, David J.; Koech, Phillip K.; Rousseau, Roger; Glezakou, Vassiliki Alexandra; Cantu, David; Malhotra, Deepika; Zheng, Feng; Whyatt, Greg; Freeman, Charles J.; Bearden, Mark D.
In: Energy Procedia, Vol. 114, 01.01.2017, p. 756-763.Research output: Contribution to journal › Conference article
}
TY - JOUR
T1 - Are Water-lean Solvent Systems Viable for Post-Combustion CO2 Capture?
AU - Heldebrant, David J.
AU - Koech, Phillip K.
AU - Rousseau, Roger
AU - Glezakou, Vassiliki Alexandra
AU - Cantu, David
AU - Malhotra, Deepika
AU - Zheng, Feng
AU - Whyatt, Greg
AU - Freeman, Charles J.
AU - Bearden, Mark D.
PY - 2017/1/1
Y1 - 2017/1/1
N2 - We present here an overview of water-lean solvents that compares their projected costs and performance to aqueous amine systems, emphasizing critical areas of study needed to evaluate their performance against their water-based brethren. The work presented here focuses on bridging these knowledge gaps. Because the majority of water-lean solvents are still at the lab scale, substantial studies are still needed to model and assess their performance at full scales. This presents a significant challenge as each formulation has different physical and thermodynamic properties and behavior, and quantifying how these different properties manifest themselves in conventional absorber-stripper configurations, or identifying new configurations that are specific for a solvent's signature behavior. We identify critical areas of study that are needed, and our efforts (e.g. custom infrastructure, molecular models) to predict, measure, and model these behaviors. Such findings are critical for determining the rheology required for heat exchanger design; absorber designs and packing to accommodate solvents with gradient changes (e.g. viscosity, contact angle, surface tension), and stripper configurations without direct steam utilization or water reflux. Another critical area of research need is to understand the molecular structure of the liquid interface and bulk as a function of CO2 loading, and to assess whether conventional film theories accurately quantify solvent behavior, or if thermodynamic models adequately quantify activity coefficients of ions in solution. We conclude with an assessment of our efforts to aid in bridging the knowledge gaps in understanding water-lean solvents, and suggestions of what is needed to enable large-scale demonstrations to meet the United States Department of Energy's goals. Published by Elsevier Ltd.
AB - We present here an overview of water-lean solvents that compares their projected costs and performance to aqueous amine systems, emphasizing critical areas of study needed to evaluate their performance against their water-based brethren. The work presented here focuses on bridging these knowledge gaps. Because the majority of water-lean solvents are still at the lab scale, substantial studies are still needed to model and assess their performance at full scales. This presents a significant challenge as each formulation has different physical and thermodynamic properties and behavior, and quantifying how these different properties manifest themselves in conventional absorber-stripper configurations, or identifying new configurations that are specific for a solvent's signature behavior. We identify critical areas of study that are needed, and our efforts (e.g. custom infrastructure, molecular models) to predict, measure, and model these behaviors. Such findings are critical for determining the rheology required for heat exchanger design; absorber designs and packing to accommodate solvents with gradient changes (e.g. viscosity, contact angle, surface tension), and stripper configurations without direct steam utilization or water reflux. Another critical area of research need is to understand the molecular structure of the liquid interface and bulk as a function of CO2 loading, and to assess whether conventional film theories accurately quantify solvent behavior, or if thermodynamic models adequately quantify activity coefficients of ions in solution. We conclude with an assessment of our efforts to aid in bridging the knowledge gaps in understanding water-lean solvents, and suggestions of what is needed to enable large-scale demonstrations to meet the United States Department of Energy's goals. Published by Elsevier Ltd.
KW - CO capture
KW - COBOL
KW - water-lean solvent
UR - http://www.scopus.com/inward/record.url?scp=85026231416&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85026231416&partnerID=8YFLogxK
U2 - 10.1016/j.egypro.2017.03.1218
DO - 10.1016/j.egypro.2017.03.1218
M3 - Conference article
AN - SCOPUS:85026231416
VL - 114
SP - 756
EP - 763
JO - Energy Procedia
JF - Energy Procedia
SN - 1876-6102
ER -