Bio-Energy Cogeneration Systems with CO2 Separation and Storage

Christoph Hochenauer, Ulrich Hohenwarter, Wolfgang Sanz, Bernhard Schlamadinger

Research output: Chapter in Book/Report/Conference proceedingConference paperpeer-review


This paper compares three different bio-energy co-generation power station concepts where CO2 is sequestered and available for permanent storage instead of discharging into the atmosphere. The different bio-energy cogeneration systems are: The pre-combustion capture of CO2, the post-combustion capture of CO2 from the flue gas and the combustion in an atmosphere of pure oxygen (Graz-Cycle). The three schemes, all based on a thermal input of about 150 MWth, are compared on the basis of their technological features, their performance, projected costs of electricity and CO2 mitigation costs. Compared to a conventional bio-energy cogeneration system, CO2 removal reduces net plant efficiency by 11 to 16 percentage points and increases the cost of electricity by approximately 54 to 89%. The scheme applying reforming and shift reaction and physical absorption of the syngas fuel appears the most appealing option for the short-term implementation of CO2 sequestration bio-energy cogeneration systems. The Graz-Cycle where the syngas is burnt in pure oxygen appears the most appealing option for the long-term option for CO2 sequestration.

Original languageEnglish
Title of host publicationProceedings of ASME TURBO EXPO 2004
Number of pages8
Publication statusPublished - 23 Dec 2004
EventASME Turbo Expo 2004 - Wien, Austria
Duration: 14 Jun 200417 Jun 2004


ConferenceASME Turbo Expo 2004

ASJC Scopus subject areas

  • Engineering(all)

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