Parametric Study of Solid Amine Sorbents for the Capture of Carbon Dioxide

Journal Article · Thu Oct 15 04:00:00 EDT 2009 · Energy and Fuels

DOI:https://doi.org/10.1021/ef9001204· OSTI ID:1014927

Gray, M. L. ^[1]; Hoffman, J. S. ^[1]; Hreha, D. C. ^[2]; Fauth, D. J. ^[1]; Hedges, S. W. ^[1]; Champagne, K. J. ^[1]; Pennline, H. W. ^[1]

---

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

Solid amine sorbents were prepared using mixtures of linear and branched primary, secondary, and tertiary amines. These amines were immobilized within polystyrene (PS)-, silicon dioxide (SiO₂)-, or polymethylmethacrylate (PMMA)-based substrates at various weight ratios. Testing was conducted in various reactor systems, where the reactive water required for the capture of carbon dioxide (CO₂) was tracked during the adsorption/desorption cycles by mass spectrometer gas analysis. The water management for these sorbents was quantified and used to assess the technical feasibility of the operating conditions for the capture of CO₂ from simulated flue gas streams. In addition, the heats of reaction and performance capture loading capacities of these sorbents were also determined by differential scanning calorimetry (DSC) and thermogravimetric analyses (TGAs), respectively, in both dry and humidified CO₂ gas streams. The regenerable solid amine sorbents investigated in this study exhibit acceptable CO₂-capture loading capacities of 2.5-3.5 mol of CO₂/kg of sorbent by TGA and a laboratory-scale fixed-bed reactor. These sorbents were stable over the adsorption/desorption temperature range of 25-105° C for 10-cyclic tests. According to the DSC analysis, the heat of reaction generated by these sorbents was in the range of 400-600 Btu/lb. CO₂, which will require a reactor with heat management capabilities.

• 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: 1014927
• Report Number(s): NETL-TPR--2451
• Journal Information: Energy and Fuels, Journal Name: Energy and Fuels Journal Issue: 10 Vol. 23; ISSN 0887-0624
• Publisher: American Chemical Society (ACS)
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
54 ENVIRONMENTAL SCIENCES