CCC/204 ISBN 978-92-9029-526-6
September 2012
copyright © IEA Clean Coal Centre
Abstract
In most discussions of systems for capturing CO2 from coal-fired power plants, three options are
described. These are:
* post-combustion capture;
* oxyfuel combustion;
* pre-combustion capture.
Recently, some researchers have realised that it may be possible to pick and choose among the
elements of the main CO2 capture systems and develop hybrid systems which are possibly cheaper
and more energy efficient. The systems to be discussed in this brief survey include:
* post-combustion capture with oxygen enriched combustion;
* regenerable sorbents (calcium looping) with oxyfuel combustion;
* post-combustion capture in IGCC plants;
* gasification with oxyfuel;
* gasification with chemical looping.
Most hybrid systems are at a very early stage of development compared with the conventional
methods with much of the research aimed at evaluation or modelling.
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