Long-term coal gasification-based power with near-zero emissions. Part B: Zecomag and oxy-fuel IGCC cycles |
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| Authors: | M.C. Romano G.G. Lozza |
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| Affiliation: | 1. Department of Energy and Environment, Chalmers University of Technology, 41296 Göteborg, Sweden;2. Department of Chemical and Environmental Engineering, University of Seville, Camino de los Descubrimientos s/n, 41092 Seville, Spain;1. Departamento de Matemática Aplicada y Estadística, Universidad Politécnica de Cartagena, Spain;2. Universidad Politécnica de Cartagena, Spain;3. E.T.S. Ingenieros Industriales, Universidad de Castilla La Mancha, Campus de Ciudad Real, Spain;1. Department of Chemical Engineering, Wuhan University of Technology, Wuhan 430070, China;2. Department of Chemical Engineering, National Cheng Kung University, Tainan 70101, Taiwan;3. Process and Energy Department, Faculty of 3mE, Delft University of Technology, Leeghwaterstraat 39, 2628, CB, Delft, The Netherlands;1. Department of Process and Energy, Delft University of Technology, Leeghwaterstraat 39, Delft 2628 CB, The Netherlands;2. Nuon Vattenfall Buggenum, Roermondseweg 55, 6081 NT Haelen, The Netherlands |
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| Abstract: | In this second part of the work, two other long-term technologies for power generation from coal are investigated. The Zecomag plant has the same syngas production system of the Zecomix plant, described in the first part of this paper, but hydrogen-rich syngas is here burned with air in an open-cycle gas turbine. The aim is a simplification of the power island, more similar to a combined cycle; however, CO2 capture falls from 100% to about 90% and NOx emissions are present.An advanced oxy-fuel IGCC is the second plant investigated in this paper, presenting the same zero-emission potential of Zecomix. Syngas is produced in a high pressure, dry feed, oxygen blown gasifier and cleaned in a hot-gas-clean-up system. Clean syngas is then burned with oxygen and expanded in a turbine, using compressed recirculated CO2 to moderate firing temperature and to cool turbine blades.The loss of net efficiency, with respect to Zecomix, is very limited (1–2 points) with both configurations. In order to better evaluate the performances obtained, a comparison with reference state-of-the art IGCCs and a long-term IGCC without CO2 capture is also presented. |
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