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Technology Collaboration Programme by IEA

Review of Fuel Cell Technologies with CO2 Capture for the Power Sector

Technical Report

1 April 2019

Capture

Jonathan Slater, Theodore Chronopoulos

Citation: IEAGHG, "Review of Fuel Cell Technologies with CO2 Capture for the Power Sector", 2019-03, April 2019.

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Publication Overview

DOOSAN U.K. was commissioned by IEAGHG to provide a comprehensive techno-economic review on MCFCs and SOFCs for the power sector. The objectives of this technical study were:

  • Deliver a literature review on MCFCs and SOFCs, identifying available configurations, status of development, applications and gaps to reach economically viable solutions
  • Supported by data from the literature, provide a techno-economic evaluation on selected cases and compare to a number of reference cases with and without a benchmark CO2 capture system (chemical absorption with Cansolv technology)
  • Identify key parameters and areas impacting the price of implementing those technologies in the power sector as CO2 abatement systems
  • Describe barriers and challenges to be addressed for SOFCs and MCFCs to achieve commercial application

Publication Summary

  • This study aims to provide a techno-economic overview of the most promising fuel cells (FCs) for the power sector. It also identifies future research areas to enhance their performance and describes barriers and challenges to achieve commercial deployment
  • The fuel cells assessed are SOFCs (Solid Oxide Fuel Cells) and MCFCs (Molten Carbonate Fuel Cells) with and without further CO2 capture/purification, in Supercritical Pulverised Coal (PC), Natural Gas Combined Cycle (NGCC, also known as CCGT, Combined Cycle Gas Turbine) and Integrated Gasification Combined Cycle (IGCC) power plants
  • The identified typical CO2 capture/purification systems to use in combination with FCs are: cryogenic CO2 separation, oxy-combustion, oxidation[1], condensation[2], membrane separation and physical absorption
  • Two generations of SOFCs are identified, with the second generation offering promising cost reductions, although they are currently at low TRL (Technology Readiness Level) and therefore require an initial higher investment. For MCFCs, the general practice is to use those as an “active CO2 concentrator” in combined cycles
  • To facilitate the comparison of the costs reported in the literature, those are homogenised by currency, year, plant size and location. The results are compared with reference costs from cases without and with a benchmark CO2 capture system (chemical absorption with Cansolv solvent)
  • After homogenisation, SOFCs and MCFCs are shown as competitive systems for CO2 capture in power plants
  • The lowest CO2 avoidance cost is showed by the MCFC case operating at atmospheric pressure in a NGCC (Natural Gas Combined Cycle) plant, with a CO2 capture system using oxy-combustion followed by condensation.
  • The lowest LCOE (levelized cost of electricity[3]) is shown by the MCFC case operating at atmospheric pressure in an integrated NGCC with CO2 purification with cryogenic separation. This case represents a reduction of the LCOE by 24% compared to the use of the benchmark CO2 capture system.
  • The dependency of the LCOE on the fuel cells key parameters was assessed through a sensitivity analysis in the case of a NGCC with a MCFC operating at atmospheric pressure. The fuel cell investment was found to have the highest impact on the LCOE. Degradation[4] is identified in the literature as key parameter and it is studied as a variation on the stack life. However, in this study, its effect was less significant
  • Challenges and barriers for the commercial deployment of fuel cells technologies with CO2 capture can be divided into manufacturing and materials, operation, public policies and the need for large-scale projects.

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