Technical evaluations of carbon capture options for power generation from coal and biomass based on integrated gasification combined cycle scheme

Conference proceedings article

Authors/Editors

Agachi, Paul

Research Areas

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Publication Details

Author list: Cormos CC, Padurean A, Agachi PS

Publisher: Elsevier: Creative Commons Attribution Non-Commercial No-Derivatives License

Place: AMSTERDAM

Publication year: 2011

Journal: Energy Procedia (1876-6102)

Journal acronym: ENRGY PROCED

Volume number: 4

Start page: 1861

End page: 1868

Number of pages: 8

eISBN: *****************

ISSN: 1876-6102

Languages: English-Great Britain (EN-GB)

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Abstract

Integrated Gasification Combined Cycle (IGCC) is a technology for power generation in which the feedstock is partially oxidized with oxygen and steam to produce syngas. In a conventional IGCC design without carbon capture, the syngas is purified for dust and hydrogen sulphide removal and then sent to a Combined Cycle Gas Turbine (CCGT) for power production. The hot GT flue gases are sent to Heat Recovery Steam Generator (HRSG) for steam generation. Additional power is produces by expanding the steam generated in a steam turbine.Carbon capture and storage (CCS) technologies are expected to play a significant role in the coming decades for reducing the greenhouse gas emissions. Integrated Gasification Combined Cycle is one of the power generation technologies having the highest potential to capture carbon dioxide with the low penalties in term of plant energy efficiency and cost. The modification of the IGCC design for carbon capture can be done in various plant concepts considering the carbon capture method to be used (e. g. pre- and post-combustion capture, syngas chemical looping etc.).This paper investigates various carbon capture methods suitable to be applied for an IGCC plant for power generation. The coal blended with biomass (sawdust) based IGCC case study investigated in the paper produces around 400 - 500 MW net electricity with more than 90 % carbon capture rate. An important focus of the paper is concentrated on overall energy efficiency optimization of the IGCC plant concepts with various carbon capture options by better heat and power integration of the main plant sub-systems (e. g. steam integration between gasification island, syngas conditioning line and the steam cycle, influence of heat and power demand for Acid Gas Removal unit etc.). A particular attention of the paper is focused on the quality specification for the captured carbon dioxide stream considering various capture options but also the storage options (enhanced oil recovery, storage in depleted oil and gas fields, saline aquifers etc.). (C) 2011 Published by Elsevier Ltd.

Keywords

CCS technologies, Chemical looping, IGCC, Pre- and post-combustion capture

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