Energy and exergy analysis of an IGCC with in-situ CO2 capture

Klimantos, P; Koukouzas, N; Kakaras, E

dc.contributor.author	Klimantos, P	en
dc.contributor.author	Koukouzas, N	en
dc.contributor.author	Kakaras, E	en
dc.date.accessioned	2014-03-01T02:50:21Z
dc.date.available	2014-03-01T02:50:21Z
dc.date.issued	2006	en
dc.identifier.issn	10716947	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/35084
dc.relation.uri	http://www.scopus.com/inward/record.url?eid=2-s2.0-80054877802&partnerID=40&md5=b451d3d8565e0e7df36dad8c132230fa	en
dc.subject.other	Calcination reactors	en
dc.subject.other	Exergetic theoretical analyses	en
dc.subject.other	Calcination	en
dc.subject.other	Carbon dioxide	en
dc.subject.other	Carbonates	en
dc.subject.other	Coal gasification	en
dc.subject.other	Moisture	en
dc.subject.other	Sorbents	en
dc.subject.other	Steam power plants	en
dc.title	Energy and exergy analysis of an IGCC with in-situ CO2 capture	en
heal.type	conferenceItem	en
heal.publicationDate	2006	en
heal.abstract	Within this study energetic and exergetic theoretical analyses of a novel IGCC power plant concept with CO2 capture are carried out. The core process of the concept examined is based on the high pressure steam gasification of high moisture low grade coals where CO2 is captured reacting exothermically with CaO-based sorbents and high hydrogencontent carbon-free fuel gas is produced without using additional shift reactors and CO2 separation stages. The carbonated sorbents are continuously fed to an oxygen blown calcination reactor where pure CO2 is released and active CaO is reproduced. This concept can be realised in a dual fluidised bed reactor system where coal gasification and CaCO3 calcination are taking place simultaneously. In this paper possible plant configurations are presented and detailed simulation of 400 MWe IGCC power plant based on a state of the art gas turbine cycle with a three pressure stage heat recovery steam generator is performed using the ASPEN Plus simulator. The calculated results demonstrate the capability of the power plant to deliver almost decarbonised electricity while achieving net plant efficiencies at about 38.4 % of coal lower heating value (LHV). Based on the energy analysis and the data generated from the simulation an exergy analysis was performed in order to quantify and localize the thermodynamic irreversibility in each process component as well as to asses the overall thermodynamic imperfection of the proposed process. Copyright © 2006 by ASME.	en
heal.journalName	American Society of Mechanical Engineers, Advanced Energy Systems Division (Publication) AES	en