Heat integration and analysis of decarbonised IGCC sites

Kok Siew Ng, Yadira Lopez, Grant M. Campbell, Jhuma Sadhukhan

Research output: Contribution to journalArticle

26 Citations (Scopus)

Abstract

Integrated gasification combined cycle (IGCC) power generation systems have become of interest due to their high combined heat and power (CHP) generation efficiency and flexibility to include carbon capture and storage (CCS) in order to reduce CO2 emissions. However, IGCC's biggest challenge is its high cost of energy production. In this study, decarbonised coal IGCC sites integrated with CCS have been investigated for heat integration and economic value analyses. It is envisaged that the high energy production cost of an IGCC site can be offset by maximising site-wide heat recovery and thereby improving the cost of electricity (COE) of CHP generation. Strategies for designing high efficiency CHP networks have been proposed based on thermodynamic heuristics and pinch theory. Additionally, a comprehensive methodology to determine the COE from a process site has been developed. In this work, we have established thermodynamic and economic comparisons between IGCC sites with and without CCS and a trade-off between the degree of decarbonisation and the COE from the heat integrated IGCC sites. The results show that the COE from the heat integrated decarbonised IGCC sites is significantly lower compared to IGCC sites without heat integration making application of CCS in IGCC sites economically competitive.

Original languageEnglish
Pages (from-to)170-188
Number of pages19
JournalChemical Engineering Research and Design
Volume88
Issue number2
Early online date2 Sep 2009
DOIs
Publication statusPublished - Feb 2010
Externally publishedYes

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