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A Novel Multi-Functional Energy System (MES) for CO2 Removal With Ultra-Low Energy Penalty by Hybrid Natural Gas and Solar Radiation

[+] Author Affiliations
Wei Han, Hongguang Jin

Chinese Academy of Sciences, Beijing, China

Paper No. GT2010-23199, pp. 769-779; 11 pages
  • ASME Turbo Expo 2010: Power for Land, Sea, and Air
  • Volume 3: Controls, Diagnostics and Instrumentation; Cycle Innovations; Marine
  • Glasgow, UK, June 14–18, 2010
  • Conference Sponsors: International Gas Turbine Institute
  • ISBN: 978-0-7918-4398-7 | eISBN: 978-0-7918-3872-3
  • Copyright © 2010 by ASME


In this paper, a novel multi-functional energy system (MES) fueled by natural gas and solar radiation is proposed. In this MES, hydrogen and electricity are co-generated and approximately 92% of CO2 derived from natural gas is removed. The solar concentrated process provides high-temperature thermal energy to the methane/steam reforming reaction. The resulting syngas enters a pressure swing adsorption unit to separate approximately 80% of hydrogen. This process significantly increases the concentration of carbon dioxide in syngas from nearly 19% to 49%, which decreases energy consumption in CO2 removal. As a result, the overall efficiency of the new system becomes about 61.1%. Compared to a conventional natural gas-based hydrogen plant with CO2 removal and a concentrated solar power tower plant, the overall efficiency of the new system is increased by 13.3 percentage points. Based on the graphical exergy analysis, the integration of synthetic utilization of natural gas and solar radiation, combination of the hydrogen production plant and power plant, and integration of the energy utilization processes and CO2 separation were found to play significant roles for the improvement of system performance. The result obtained here provides a new approach for CO2 removal with ultra-low thermal efficiency reduction (energy penalty) and high efficient use of solar radiation.

Copyright © 2010 by ASME



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