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International Test Network for CO₂ Capture: Report on 8th Workshop

1 November 2005
Capture
Event Proceedings

This workshop was the eighth in a series to discuss co-operation in development of MEA and related solvents to capture CO₂ from power plant flue gases. The previous events were in Gaithersburg, Calgary, Apeldoorn, Kyoto, Pittsburgh, Trondheim, and Vancouver. Copies of all the reports from and including the Apeldoorn meeting are available on CD

Technical Report

Oxy-combustion Processes for CO₂ Capture from Power Plant

1 July 2005
Capture

The IEAGHG R&D programme has completed several studies on the costs of CO₂ capture from power plants using post combustion and pre-combustion capture technology. The costs of oxy-combustion capture have not been studied to the same depth because of the immaturity of the technology. Although commercial examples of the technology are still not in existence it is now felt that there has been sufficient advance in knowledge to attempt a cost study of similar accuracy. The process is applicable to both natural gas and coal fired power plant although the equipment used for the different fuels is quite different. There are many oxy-combustion process variants some of which are still in early stages of development. For example processes are proposed which use dense oxygen conducting membranes or recycle of water rather than CO₂. It would be difficult to generate firm costs for process using such novel elements. The brief given to the contractor was to select a gas fired and a coal fired process which would make use of existing designs and not represent any significant stepout beyond accepted limits. For the coal fired case this essentially means maintaining sufficient CO₂ recirculation so as not to radically alter velocities and heat fluxes in the radiant and convective parts of a conventional pulverized coal boiler. For the gas fired case which would be a combined cycle gas turbine with CO₂ recycle the situation is more difficult since a new gas turbine model would have to be developed. The brief was to base this machine on existing design limitations and practices so that the changes would be minimized. The commercial costing of this machine remains difficult since the price will be highly dependent on the size of the market.

Technical Report

Retrofit of CO₂ Capture to Natural Gas Combined Cycle Power Plants

1 January 2005
Capture

Most of the power plants currently being built in developed countries are natural gas fired combined cycle plants. Such plants could potentially be good candidates for CO₂ capture retrofit because they are relatively new and have high thermal efficiencies. This study assesses the feasibility and costs of retrofitting CO₂ capture to modern natural gas combined cycle plants. The study was carried out by Jacobs Consultancy Netherland B.V.

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