Performance of immobilized tertiary amine solid sorbents for the capture of carbon dioxide

Journal Article · Tue Jan 01 04:00:00 EST 2008 · International Journal of Greenhouse Gas Control

DOI:https://doi.org/10.1016/S1750-5836(07)00088-6· OSTI ID:1015121

Gray, M. L. ^[1]; Champagne, K J. ^[2]; Fauth, D. ^[1]; Baltrus, J. P. ^[1]; Pennline, Henry ^[1]

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1. National Energy Technology Lab. (NETL), Pittsburgh, PA, (United States)
2. ,National Energy Technology Lab. (NETL), Pittsburgh, PA, (United States)

The capture of carbon dioxide (CO₂) from a simulated flue gas stream was achieved by utilizing immobilized tertiary amine solid sorbents. The tertiary amine immobilized in these solid substrates was 1, 8 Diazabicyclo-[5.4.0]-undec-7-ene (DBU) and it has the stoichiometric capability of capturing carbon dioxide at a 1:1 R-NH₂:CO₂ molar ratio. This is a unique feature compared to other primary and secondary amines which capture CO₂ at a 2:1 molar ratio, thus making the immobilized DBU solid sorbents competitive with existing commercially available sorbents and liquid amine-based capture systems. The immobilized DBU solid sorbents prepared in this study exhibit acceptable CO₂ capture capacities of 3.0 mol CO₂/kg sorbent at 298 K; however, at the critical operational temperature of 338 K, the capacity was reduced to 2.3 mol/kg sorbent. The DBU sorbents did exhibit acceptable stability over the adsorption/desorption temperature range of 298-360 K based on XPS and TGA analyses.

• Research Organization: National Energy Technology Laboratory (NETL), Pittsburgh, PA, Morgantown, WV, and Albany, OR (United States)
• Sponsoring Organization: USDOE Assistant Secretary for Fossil Energy (FE)
• OSTI ID: 1015121
• Report Number(s): NETL-TPR--2228
• Journal Information: International Journal of Greenhouse Gas Control, Journal Name: International Journal of Greenhouse Gas Control Journal Issue: 1 Vol. 2; ISSN 1750-5836
• Publisher: Elsevier
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES
58 GEOSCIENCES
CAPTURE
CARBON DIOXIDE
TERTIARY AMINE AND SOLID SORBENT