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type     June, 2005

Vol 1 Chapter 12: Generation of Hydrogen Fuels for a Thermal Power Plant with Integrated CO2-Capture Using a CaO–CaCO3 Cycle

Julien Meyer, Rolf Jarle Aaberg and Bjørg Andresen

Abstract: A new integrated reforming reaction for hydrogen production is simulated. Hydrogen gas is produced from natural gas and water in a modified reforming reaction where CO2 reacts with a metal oxide (MetO, e.g. CaO) to form a metal carbonate (MetCO3, e.g. CaCO3). The carbonate is decomposed thermally in a separate reaction and the metal oxide is recycled back to the reformer. This provides an efficient means of separation of the carbon dioxide from the reformer. The exothermic carbonation reaction provides most of the energy necessary to drive the hydrogen-producing reaction to completion. The CO2 removal process has been designed and simulated to test the generation of hydrogen fuels for a thermal power plant. Although, the concept originally was intended for integration with processes with high-temperature waste heat, the thermodynamic analysis shows that the process can be used for hydrogen production for a combined cycle power plant and steam boilers as well.

Carbon Dioxide Capture for Storage in Deep Geologic Formations – Results from the CO2 Capture Project Capture and Separation of Carbon Dioxide from Combustion Sources - Volume 1
Edited by:
David C. Thomas, Senior Technical Advisor, Advanced Resources International Inc, USA

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