Novel CO2 emissions reduction technique for IGCC plants

Kakaras, E; Koumanakos, A; Doukelis, A; Giannakopoulos, D; Hatzilau, Ch; Weimer, T

dc.contributor.author	Kakaras, E	en
dc.contributor.author	Koumanakos, A	en
dc.contributor.author	Doukelis, A	en
dc.contributor.author	Giannakopoulos, D	en
dc.contributor.author	Hatzilau, Ch	en
dc.contributor.author	Weimer, T	en
dc.date.accessioned	2014-03-01T02:50:10Z
dc.date.available	2014-03-01T02:50:10Z
dc.date.issued	2005	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/34929
dc.relation.uri	http://www.scopus.com/inward/record.url?eid=2-s2.0-27744517138&partnerID=40&md5=f81d7c78fc5ae1243b5df6095acc9a32	en
dc.subject.other	Carbon dioxide	en
dc.subject.other	Coal fired boilers	en
dc.subject.other	Coal industry	en
dc.subject.other	Electricity	en
dc.subject.other	Gas emissions	en
dc.subject.other	Lime	en
dc.subject.other	Coal-fired power plants	en
dc.subject.other	Emission reduction	en
dc.subject.other	Mass balance	en
dc.subject.other	Simulation models	en
dc.subject.other	Power plants	en
dc.title	Novel CO2 emissions reduction technique for IGCC plants	en
heal.type	conferenceItem	en
heal.identifier.secondary	GT2005-68977	en
heal.publicationDate	2005	en
heal.abstract	Scope of the work presented is to examine and evaluate the state of the art in technological concepts towards the capture and sequestration of CO 2 from coal-fired power plants. The discussion is based on the evaluation of a novel concept dealing with the carbonation-calcination process of lime for CO2 capture from coal fired power plants compared to integration of CO2 capture in an Integrated Gasification Combined Cycle power plant. In the novel concept, coal is gasified with steam in the presence of lime. Lime absorbs the CO2 released from the coal, producing limestone. The produced gas can be a low-carbon or even zero-carbon (H2) gas. depending on the ratio of lime added to the process. The produced gas can be used in state-of-the-art combined cycles for electricity generation, producing almost no CO2 emissions or other harmful pollutants. The limestone is regenerated in a second reactor, where pure CO 2 is produced, which can be either marketed to industry or sequestered in long term disposal areas. The simulation model of a Combined Cycle power plant, integrating the novel carbonation-calcination process, is based on available data from a typical natural gas fired Combined Cycle power plant. The natural gas fired power plant was adopted to firing with the low-C fuel, maintaining the basic operating characteristics. The performance of the novel concept power plant is compared to that of an IGCC with CO2 removal by means of Selexol absorption. Results from thermodynamic simulation, dealing with the most important features for CO2 reduction, are presented. The operating characteristics, as well as the main figures of the plant energy balances are included. A preliminary economic comparison is also provided, taking into account investment and operating costs, in order to estimate the electricity cost related to the two different technological approaches and the economic constrains towards the potentials for applications are examined. The cycle calculations were performed using the thermodynamic cycle calculation software ENBIPRO (ENergie-BIllanz-PROgram). ENBIPRO is a powerful tool for heat and mass balance calculations, solving complex thermodynamic circuits, calculating the efficiency, and allowing exergetic and exergoeconomic analysis of power plants. The software code models all pieces of equipment that usually appear in power plant installations and can accurately calculate all thermodynamic properties (temperature, pressure, enthalpy) at each node of the thermodynamic circuit, power consumption of each component, flue gas composition etc [1]. The code has proven its validity by accurately simulating a large number of power plants and through comparison of the results with other commercial software.	en
heal.journalName	Proceedings of the ASME Turbo Expo	en
dc.identifier.volume	5	en
dc.identifier.spage	495	en
dc.identifier.epage	502	en