In this paper an alternative to the so-called “oxy-fuel” combustion for capture is evaluated. “Chemical looping combustion” (CLC), is closely related to oxy-fuel combustion as the chemically bound oxygen reacts in a stoichiometric ratio with the fuel. In the CLC process the overall combustion reaction takes place in two reaction steps in two separate reactors. In the reduction reactor, the fuel is oxidized by the oxygen carrier, i.e., the metal oxide MeO. The metal oxide is reduced to a metal oxide with a lower oxidation number, Me, in the reaction with the fuel. In this manner, pure oxygen is supplied to the reaction with the fuel without using a traditional air separation plant, like cryogenic distillation of air. The paper presents a thermodynamic cycle analysis, where CLC is applied in a humid air turbine concept. Main parameters are identified, and these are varied to examine the influence on cycle efficiency. Results on cycle efficiency are presented and compared to other capture options. Further, an evaluation of the oxygen carrier, metals/oxides, is presented. An exergy analysis is carried out in order to understand where losses occur, and to explain the difference between CLC and conventional combustion. The oxidation reactor air inlet temperature and the oxidation reactor exhaust temperature have a significant impact on the overall efficiency. This can be attributed to the controlling effect of these parameters on the required airflow rate. An optimum efficiency of 55.9% has been found for a given set of input parameters. Crucial issues of oxygen carrier durability, chemical performance, and mechanical properties have been idealized, and further research on the feasibility of CLC is needed. Whether or not the assumption 100% gas conversion holds, is a crucial issue and remains to be determined experimentally. Successful long-term operation of chemical looping systems of this particular type has not yet been demonstrated. The simulation points out a very promising potential of CLC as a power/heat generating method with inherent capture of Exergy analysis show reduced irreversibilities for CLC compared to conventional combustion. Simulations of this type will prove useful in designing CLC systems in the future when promizing oxygen carriers have been investigated in more detail .
Skip Nav Destination
Article navigation
April 2004
Technical Papers
Inherent Capture Using Chemical Looping Combustion in a Natural Gas Fired Power Cycle
O̸. Brandvoll,
O̸. Brandvoll
The Norwegian University of Science and Technology, N-7491 Trondheim, Norway
Search for other works by this author on:
O. Bolland
O. Bolland
The Norwegian University of Science and Technology, N-7491 Trondheim, Norway
Search for other works by this author on:
O̸. Brandvoll
The Norwegian University of Science and Technology, N-7491 Trondheim, Norway
O. Bolland
The Norwegian University of Science and Technology, N-7491 Trondheim, Norway
Contributed by the International Gas Turbine Institute (IGTI) of THE AMERICAN SOCIETY OF MECHANICAL ENGINEERS for publication in the ASME JOURNAL OF ENGINEERING FOR GAS TURBINES AND POWER. Paper presented at the International Gas Turbine and Aeroengine Congress and Exhibition, Amsterdam, The Netherlands, June 3–6, 2002; Paper No. 2002-GT-30129. Manuscript received by IGTI, Dec. 2001, final revision, Mar. 2002. Associate Editor: E. Benvenuti.
J. Eng. Gas Turbines Power. Apr 2004, 126(2): 316-321 (6 pages)
Published Online: June 7, 2004
Article history
Received:
December 1, 2001
Revised:
March 1, 2002
Online:
June 7, 2004
Citation
Brandvoll , O., and Bolland, O. (June 7, 2004). "Inherent Capture Using Chemical Looping Combustion in a Natural Gas Fired Power Cycle ." ASME. J. Eng. Gas Turbines Power. April 2004; 126(2): 316–321. https://doi.org/10.1115/1.1615251
Download citation file:
Get Email Alerts
Shape Optimization of an Industrial Aeroengine Combustor to reduce Thermoacoustic Instability
J. Eng. Gas Turbines Power
Dynamic Response of A Pivot-Mounted Squeeze Film Damper: Measurements and Predictions
J. Eng. Gas Turbines Power
Review of The Impact Of Hydrogen-Containing Fuels On Gas Turbine Hot-Section Materials
J. Eng. Gas Turbines Power
Effects of Lattice Orientation Angle On Tpms-Based Transpiration Cooling
J. Eng. Gas Turbines Power
Related Articles
Chemical-Looping Combustion for Combined Cycles With CO 2 Capture
J. Eng. Gas Turbines Power (July,2006)
Producing Hydrogen and Power Using Chemical Looping Combustion and Water-Gas Shift
J. Eng. Gas Turbines Power (March,2010)
Comparative Study of Two Low C O 2 Emission Power Generation System Options With Natural Gas Reforming
J. Eng. Gas Turbines Power (September,2008)
Natural Gas Decarbonization to Reduce CO 2 Emission From Combined Cycles—Part II: Steam-Methane Reforming
J. Eng. Gas Turbines Power (January,2002)
Related Chapters
Introduction
Consensus on Operating Practices for Control of Water and Steam Chemistry in Combined Cycle and Cogeneration
Outlook
Closed-Cycle Gas Turbines: Operating Experience and Future Potential
A Simple Carburetor
Case Studies in Fluid Mechanics with Sensitivities to Governing Variables