Development of oxy-fuel IGCC system with CO2 recirculation for CO2 capture

Yuso Oki, Jun Inumaru, Saburo Hara, Makoto Kobayashi, Hiroaki Watanabe, Satoshi Umemoto, Hisao Makino

Research output: Contribution to journalArticlepeer-review

29 Citations (Scopus)

Abstract

CO2 emission control is significant issue as a countermeasure for a global warming problem. Utility companies are required to reduce CO 2 emission from thermal power stations and make various efforts to improve thermal efficiency and to utilize carbon neutral fuels such as biomass fuels. CCS (CO2 capture and storage) technology is regarded as one method to reduce CO2 emission, but CCS required great decrease of thermal efficiency. As amount of fossil fuel on the globe is so restricted, it is important to keep high thermal efficiency as high as possible, in order to utilize valuable fossil fuel effectively. This project plans to develop innovative gasification technology with CO2 capture, which can keep thermal efficiency as high as state of the art IGCC plant, namely more than 40%. This is to gasify coal with mixed gas of O2 and recycled CO 2 flue gas, just like oxy-fuel combustion system. We expect following two merits. First merit is to simplify the system. As the CO2 concentration in exhaust gas is almost 100%, this system doesn't require CO 2 separation unit. So no steam is required to bleed from steam cycle in order to maintain absorber for CO2, therefore thermal efficiency is kept high even after capturing CO2. We expect another merit in this system. Generally speaking, CO2 gas works as gasifying agent for coal, so high CO2 concentration improves gasification performance of gasifier. This paper is to report the status of the project executed by CRIEPI.

Original languageEnglish
Pages (from-to)1066-1073
Number of pages8
JournalEnergy Procedia
Volume4
DOIs
Publication statusPublished - 2011
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Energy(all)

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