Engineering Amine-Based Solid Adsorbents for Carbon Capture From Dilute CO2 Streams

Wednesday, October 19, 2011: 4:30 PM
209 A/B (Minneapolis Convention Center)
Sunho Choi1, McMahan L. Gray2, Taku Watanabe3, David Sholl3 and Christopher W. Jones1, (1)School of Chemical & Biomolecular Engineering, Georgia Institute of Technology, Atlanta, GA, (2)U.S. Department of Energy, National Energy Technology Laboratory, Pittsburgh, PA, (3)School of Chemical and Biomolecular Engineering, Georgia Institute of Technology, Atlanta, GA

A prominent methodology to tune the adsorption properties of solids for applications in CO2 capture is to functionalize them with amines sites, as the amine-CO2 interaction is strong under a variety of conditions [1].  Specifically, amine-modified solids such as porous silicates and MOFs are now well-studied under conditions that simulate post-combustion CO2 capture.  In addition, we have recently shown that supported amine materials are promising solids for removal of CO2 from ultra-dilute gas sources such as the ambient air [2-4].

This talk will focus on the engineering of inorganic-organic hybrids amine adsorbents to enhance their CO2 adsorption performance, with a specific focus on CO2 adsorption capacity, adsorption kinetics and stability to practical desorption conditions. The structures of various hybrid silica-based and MOF-based adsorbents were modified by tuning the both the host substrate and the surface amine functionalities.  Structure-property relationships for these materials are under development, and based on these studies, we will discuss the potential to design inorganic-organic hybrid adsorbents with desired CO2 adsorption characteristics, such as the ability to extract CO2 efficiently from ambient air.

[1] S. Choi, J. H. Drese, C. W. Jones, ChemSusChem 2009, 2, 796-854.

[2] S. Choi, J. H. Drese, P. M. Eisenberger, C. W. Jones, AIChE Annual Meeting, Nashville, Tennessee, 2009.

[3] S. Choi, J. H. Drese, P. M. Eisenberger, C. W. Jones, Env. Sci. Technol., 2011, 45, 2420-2427.

[4] S. Choi, M. L. Gray, C. W. Jones, ChemSusChem, 2011, 10.1002/cssc.201000355

Extended Abstract: File Not Uploaded
See more of this Session: Sorbent Processes for Carbon Capture
See more of this Group/Topical: Sustainable Engineering Forum