Development of a Conceptual Process for Selective CO{sub 2} Capture from Fuel Gas Streams Using [hmim][Tf2N] Ionic Liquid as a Physical Solvent [electronic resource].
- Published
- Washington, D.C. : United States. Dept. of Energy, 2013.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy. - Physical Description
- 3,905-3,917 : digital, PDF file
- Additional Creators
- National Energy Technology Laboratory (U.S.), United States. Department of Energy, and United States. Department of Energy. Office of Scientific and Technical Information
Access Online
- Restrictions on Access
- Free-to-read Unrestricted online access
- Summary
- The Ionic Liquid (IL) [hmim][Tf2N] was used as a physical solvent in an Aspen Plus simulation, employing the Peng-Robinson Equation of State (P-R EOS) with Boston-Mathias (BM) alpha function and standard mixing rules, to develop a conceptual process for CO₂ capture from a shifted warm fuel gas stream produced from Pittsburgh # 8 coal for a 400 MWe power plant. The physical properties of the IL, including density, viscosity, surface tension, vapor pressure and heat capacity were obtained from literature and modeled as a function of temperature. Also, available experimental solubility values for CO₂, H₂, H₂S, CO, and CH₄ in this IL were compiled and their binary interaction parameters (δ{sub ij} and l{sub ij}) were optimized and correlated as functions of temperature. The Span-Wager Equation-of-State EOS was also employed to generate CO₂ solubilities in [hmim][Tf2N] at high pressures (up to 10 MPa) and temperatures (up to 510 K). The conceptual process developed consisted of 4 adiabatic absorbers (2.4 m ID, 30 m high) arranged in parallel and packed with Plastic Pall Rings of 0.025 m for CO₂ capture; 3 flash drums arranged in series for solvent (IL) regeneration with the pressure-swing option; and a pressure-intercooling system for separating and pumping CO₂ up to 153 bar to the sequestration sites. The compositions of all process streams, CO₂ capture efficiency, and net power were calculated using Aspen Plus simulator. The results showed that, based on the composition of the inlet gas stream to the absorbers, 95.67 mol% of CO₂ was captured and sent to sequestration sites; 99.5 mol% of H₂ was separated and sent to turbines; the solvent exhibited a minimum loss of 0.31 mol%; and the net power balance of the entire system was 30.81 MW. These results indicated that [hmim][Tf2N] IL could be used as a physical solvent for CO₂ capture from warm shifted fuel gas streams with high efficiency.
- Report Numbers
- E 1.99:univ-pub-102
univ-pub-102 - Subject(s)
- Other Subject(s)
- Note
- Published through SciTech Connect.
07/01/2013.
"univ-pub-102"
ENERGY & FUELS 27 7 FT
Resnik, Kevin; Luebke, David R; Basha, Omar M; Keller, Murphy J; P Morsi, Badie I. - Funding Information
- DE-FE0004000
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