Abstract

This study investigated different concepts for natural-gas-fired power plants with the CO2capture, and compared them based on the net plant efficiency and emission of CO2. The cycles were based ona six oxy-fuel, one post-combustion and two pre-combustion capture concept. This paper presented theresults of an environmental evaluation performed by the application of the Life Cycle Analysis (LCA) methodusing SimaPro model to compare an Advanced Zero Emission Power Plant (AZEP) concept with a conventionalcombined cycle power plant from 50MW to 400MW. The LCA study was built upon the calculation and thecomparison of several impacts (emissions of CO2, CO, NOX, and SOX, consumption of water and primaryenergy) and several impact categories (climate change, acid rain, ozone depletion and Ecotoxicity). The workwas developed entirely using the Eco-indicator99 of the LCA method. The results showed that for all studiedimpacts, the AZEP power plants have fewer impacts. However, compared to the conventional combined cyclepower plants, the total primary energy consumption in the AZEP concept is bigger due to the lower electricefficiency.

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