Journal
JOURNAL OF CLEANER PRODUCTION
Volume 231, Issue -, Pages 529-542Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.jclepro.2019.05.217
Keywords
Brayton cycle; Turbine cooling; Steam Rankine cycle; Carbon capture; Methanation; Polymer electrolyte membrane electrolyzer
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Present work considers a gas/steam combined cycle power plant at Auraiya, Uttar Pradesh, India having multiple units with total capacity of 663.36 MW for thermo-economic analysis after deploying carbon capture and storage in its one unit. Here the carbon dioxide captured from the plant is subjected to methanation to get methane, for use as fuel in gas turbine to augment the plant output and minimize carbon dioxide emission. The gas/steam combined cycle with carbon capture for methanation offers an increase in output from 229.6 MW without carbon capture and storage to 384.738 MW with carbon capture and storage at 1475 K turbine inlet temperature and 16.7 cycle pressure ratio. The improvement in work output is due to the conversion of captured carbon dioxide into methane and using this methane as a fuel in an additional gas turbine to produce additional work output. Economic analysis of this combined cycle produces electricity at the cost of 336074.76 US$ per MW. (C) 2019 Elsevier Ltd. All rights reserved.
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