Techno-economic assessment of two novel feeding systems for a dry-feed gasifier in an IGCC plant with Pd-membranes for CO[subscript 2] capture
Name
PD-MEMBRANES _CO2feeding.pdf
Size
1.27 MB
Format
Adobe PDF
Checksum (MD5)
5e67959f1df7cb54d4f801188a97302b
Author(s)
Gazzani, Matteo
Turi, Davide M.
Macchi, Ennio
Manzolini, Giampaolo
Ghoniem, Ahmed F
Alternative Title
Techno-economic assessment of two novel feeding systems for a dry-feed gasifier in an IGCC plant with Pd-membranes for CO2 capture
Date Issued
April 2014
Journal
International Journal of Greenhouse Gas Control
Publisher
Elsevier
Citation
Gazzani, Matteo, Davide M. Turi, Ahmed F. Ghoniem, Ennio Macchi, and Giampaolo Manzolini. “Techno-Economic Assessment of Two Novel Feeding Systems for a Dry-Feed Gasifier in an IGCC Plant with Pd-Membranes for CO[subscript 2] Capture.” International Journal of Greenhouse Gas Control 25 (June 2014): 62-78.
Version
Author's final manuscript
Abstract
This study focuses on the application of Pd-based membranes for CO[subscript 2] capture in coal fueled power plants. In particular, membranes are applied to Integrated Gasification Combined Cycle with two innovative feeding systems. In the first feeding system investigated, CO[subscript 2] is used both as fuel carrier and back-flushing gas for the candle filters, while in the second case N[subscript 2] is the fuel carrier, and CO[subscript 2] the back-flushing gas. The latter is investigated because current dry feed technology vents about half of the fuel carrier, which is detrimental for the CO[subscript 2] avoidance in the CO[subscript 2] case. The hydrogen separation is performed in membrane modules arranged in series; consistently with the IGCC plant layout, most of the hydrogen is separated at the pressure required to fuel the gas turbine. Furthermore, about 10% of the overall hydrogen permeated is separated at ambient pressure and used to post-fire the heat recovery steam generator. This layout significantly reduces membrane surface area while keeping low efficiency penalties.
The resulting net electric efficiency is higher for both feeding systems, about 39%, compared to 36% of the reference Selexol-based capture plant. The CO[subscript 2] avoidance depends on the type of feeding system adopted, and its amount of vented gas; it ranges from 60% to 98%. From the economic point of view, membrane costs are significant and shares about 20% of the overall plant cost. This leads in the more optimistic case to a CO[subscript 2] avoidance cost of 35 €/t[subscript CO2], which is slightly lower than the reference case.
MIT Department
Massachusetts Institute of Technology. Department of Mechanical Engineering
Terms of Use
Creative Commons Attribution-NonCommercial-NoDerivs License
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DOI of Published Version
https://doi.org/10.1016/j.ijggc.2014.03.011
