Low-carbon power generation cycles : the feasibility of CO2 capture and opportunities for integration

• Autorzy: Budzianowski W. M.
• Języki publikacji: EN

Abstrakty

EN

Low-carbon power generation is receiving increasing interest due to climate warming concerns. The present article analyzes three low-carbon power cycles. The focus is on the feasibility of CO2 capture and opportunities for energy and mass integration. The first power cycle is a zero-carbon solid biomass fuelled multi-step gasification gas turbine power cycle involving multi-step solid biomass conversion, which is a more reversible process than one-step biomass combustion. The second zero-carbon coal-fired oxy-gasification steam chemical looping combustion gas turbine cycle benefits from: (i) improved cycle efficiency due to the increased reversibility of the chemical looping combustion process, (ii) cycle mass and energy integration due to the several recirculation loops involved, and (iii) extremely high CO2 capture rate due to the purity of the CO2/H2O mixture achieved at the outlet of a syngas reactor. The last power cycle - a biogas fuelled oxy-reforming fuel cell cycle - is superior in terms of the feasibility of CO2 capture, i.e. CO2 is captured from CO2-enriched streams, and due to the utilization of renewable biogas, negative net CO2 atmospheric emissions are achieved. It is concluded that high CO2 capture rates are feasible from pressurized CO2-enriched streams comprising either water or hydrogen, thus necessitating oxy-fuel power cycles. Opportunities for mass and energy integration are found to be greater in systems involving closed mass and energy recirculation loops. The discussions also emphasize that low-carbon power cycles could achieve minimized exergy losses by applying more reversible energy conversion processes.

Słowa kluczowe

EN

low-carbon economy; LCE; power generation; CO2 capture; integration; reversibility

PL

gospodarka niskoemisyjna; wytwarzanie mocy; wychwytywanie dwutlenku węgla; wychwytywanie CO2; integracja; odwracalność

• Wydawca: Institute of Heat Engineering, Warsaw University of Technology
• Czasopismo: Journal of Power Technologies
• Rocznik: 2011
• Tom: Vol. 91, nr 1
• Strony: 6--13
• Opis fizyczny: Bibliogr. 12 poz., rys.

Twórcy

autor

Budzianowski W. M.

• Wrocław University of Technology, Wybrzeże Wyspiańskiego 27, 50-370 Wrocław, Poland,

Bibliografia

• [1] W. M. Budzianowski, Mass-recirculating systems in CO2 capture technologies: A review, Recent Patents on Engineering 4 (1) (2010) 15-43.
• [2] M. J. Prins, K. J. Ptasinski, F. J. J. G. Janssen, More efficient biomass gasification via torrefaction, Energy 31 (15) (2006) 3458-3470.
• [3] W. M. Budzianowski, Thermal integration of combustionbased energy generators by heat recirculation, Rynek Energii 91 (6) (2010) 108-115.
• [4] W. M. Budzianowski, R. Miller, Towards improvements in thermal efficiency and reduced harmful emissions of combustion processes by using recirculation of heat and mass, Recent Patents on Mechanical Engineering 2 (3) (2009) 228-239.
• [5] W. R. Dunbar, N. Lior, Sources of combustion irreversibility, Combustion Science and Technology 103 (1&6) (1994) 41-61.
• [6] S. Kjelstrup, O. M. Coppens, J. G. Pharoah, P. Pfeifer, Nature-inspired energy- and material efficient design of a polymer electrolyte membrane fuel cell 24 (9) (2010) 5097-5108.
• [7] W. M. Budzianowski, A rate-based method for design of reactive gas-liquid systems, Rynek Energii 83 (4) (2009) 21-26.
• [8] N. Nagasaki, Y. Takeda, T. Akiyama, T. Kumagai, Progress toward commercializing new technologies for coal use - oxygen-blown IGCC+CCS, Hitachi Review 59 (3) (2010) 77-82.
• [9] W. M. Budzianowski, Negative net CO2 emissions from oxy-decarbonization of biogas to H2, International Journal of Chemical Reactor Engineering 8 (2010) A156.
• [10] J. Milewski, J. Lewandowski, Comparative analysis of time constants in Solid Oxide Fuel Cell processes - selection of key processes for modeling power systems, Journal of Power Technologies 91 (1) (2011) 1-5.
• [11] W. M. Budzianowski, An oxy-fuel mass-recirculating process for H2 production with CO2 capture by autothermal catalytic oxyforming of methane, International Journal of Hydrogen Energy 35 (14) (2010) 7754-7769.
• [12] W. M. Budzianowski, Superadiabatic lean catalytic combustion in a high-pressure reactor, International Journal of Chemical Reactor Engineering 7 (2009) A20.