Process integration of chemical looping combustion with oxygen uncoupling in a coal-fired power plant

Maurizio Spinelli, Petteri Peltola, Aldo Bischi, Jouni Ritvanen, Timo Hyppänen, Matteo C. Romano

Research output: Contribution to journalArticlepeer-review

27 Citations (Scopus)

Abstract

High-temperature solid looping processes for CCS (carbon capture and storage) represent a class of promising technologies that enables CO2 capture with relatively low net efficiency penalties. The novel concept of the CLOU (Chemical Looping with Oxygen Uncoupling) process is based on a system of two interconnected fluidized bed reactors that operate at atmospheric pressure. In the fuel reactor, the capability of certain metal oxides to spontaneously release molecular oxygen at high temperatures is exploited to promote the direct conversion of coal in an oxygen-rich atmosphere. As a novel CO2 capture concept, the CLOU process requires the optimization of design and operation parameters, which may substantially influence the total power plant performance. This study approaches this issue by performing joint simulations of CLOU reactors using a 1.5D model and a steam cycle power plant. A sensitivity analysis has been performed to investigate the performance and main technical issues that are related to the integration of a CLOU island in a state-of-the-art USC (ultra-supercritical) power plant. In particular, the effect of the key process parameters has been evaluated. Superior performance has been estimated for the power plant, with electrical efficiencies of approximately 42% and more than 95% CO2 avoided.

Original languageEnglish
Pages (from-to)646-659
Number of pages14
JournalEnergy
Volume103
DOIs
Publication statusPublished - 15 May 2016
Externally publishedYes

Keywords

  • Chemical looping combustion
  • Clean coal
  • CLOU
  • CO capture
  • Fluidized bed

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