THERMAL SCIENCE

International Scientific Journal

COMPARISON OF OXYGEN CARRIERS FOR CHEMICAL-LOOPING COMBUSTION

ABSTRACT
Chemical-looping combustion is a combustion technology with inherent separation of the greenhouse gas CO2. This technique involves combustion of fossil fuels by means of an oxygen carrier which transfers oxygen from the air to the fuel. In this manner a decrease in efficiency is avoided for the energy demanding separation of CO2 from the rest of the flue gases. Results from fifty oxygen carriers based on iron-, manganese- and nickel oxides on different inert materials are compared. The particles were prepared using freeze granulation, sintered at different temperatures and sieved to a size 125-180 mm. To simulate the environment the particles would be exposed to in a chemical-looping combustor, reactivity tests under alternating oxidizing and reducing conditions were performed in a laboratory fluidized bed-reactor of quartz. Reduction was performed in 50% CH4/50% H2O while the oxidation was carried out in 5% O2 in nitrogen. In general nickel particles are the most reactive, followed by manganese. Iron particles are harder but have a lower reactivity. An increase in sintering temperatures normally leads to an increase in strength and decrease in reactivity. Several particles investigated display a combination of high reactivity and strength as well as good fluidization behavior, and are feasible for use as oxygen carriers in chemical-looping combustion.
KEYWORDS
PAPER SUBMITTED: 2005-08-29
PAPER REVISED: 2006-01-19
PAPER ACCEPTED: 2006-03-14
DOI REFERENCE: https://doi.org/10.2298/TSCI0603093J
CITATION EXPORT: view in browser or download as text file
THERMAL SCIENCE YEAR 2006, VOLUME 10, ISSUE Issue 3, PAGES [93 - 107]
REFERENCES
  1. Anheden, M.; Svedberg, G., Exergy analysis of chemical-looping combustion systems. Energy Conversion and Management 1998, 39, (16-18), 1967-1980.
  2. Ishida, M.; Zheng, D.; Akehata, T., Evaluation of a Chemical-Looping Combustion Power-Generation System by Graphic Exergy Analysis. Energy 1987, 12, 145-154.
  3. Lyngfelt, A.; Leckner, B.; Mattisson, T., A fluidized-bed combustion process with inherent CO2 separation; application of chemical-looping combustion. Chemical Engineering Science 2001, 56, 3101-3113.
  4. Lyngfelt, A.; Leckner, B., Technologies for CO2 separation. Minisymposium on Carbon Dioxide Capture and Storage, Chalmers University of Technology and Göteborg University, Göteborg 1999.
  5. Mattisson, T.; Lyngfelt, A., Capture of CO2 using chemical-looping combustion. in Scandinavian-Nordic Section of Combustion Institute. 2001. Göteborg 2001.
  6. Cho, P.; Mattisson, T.; Lyngfelt, A., Carbon formation on nickel and iron oxide-containing oxygen-carriers for chemical-looping combustion. Industrial and Energy Chemistry Research 2005, 44, 668-676.
  7. Mattisson, T.; Johansson, M.; Lyngfelt, A., Multi-Cycle Reduction and Oxidation of Different Types of Iron Oxide Particles - Application of Chemical-Looping Combustion. Energy & Fuels 2004, 18, (3), 628-637.
  8. Adánez, J.; de Diego, L. F.; García-Labiano, F.; Gayán, P.; Abad, A.; Palacios, J. M., Selection of Oxygen Carriers for Chemical-Looping Combustion. Energy & Fuels 2004, 18, 371-377.
  9. Mattisson, T., et al. Capture of CO2 in coal combustion (CCCC), ECSC Coal RTD programme, Final report, Project 7220-PR-125. 2005.
  10. Johansson, M.; Mattisson, T.; Lyngfelt, A., Investigation of Fe2O3 with MgAl2O4 for Chemical-Looping Combustion. Industrial and Energy Chemistry Research 2004, 43, (22), 6978-6987.
  11. Cho, P.; Mattisson, T.; Lyngfelt, A., Defluidization Conditions for Fluidized-Bed of Iron, Nickel, and Manganese oxide-Containing Oxygen-Carriers for Chemical-Looping Combustion. Industrial and Engineering Chemistry Research 2006, 45, (3), 968-977.
  12. Johansson, M.; Mattisson, T.; Lyngfelt, A., Investigation of Mn3O4 with stabilized ZrO2 for chemical-looping combustion. Submitted for publication 2005.
  13. Abad, A.; Mattisson, T.; Lyngfelt, A.; Rydén, M., Chemical-looping Combustion in a 300 W Continuously Operating Reactor System Using a Manganese-Based Oxygen Carrier. Fuel - Available online 27 dec 2005 2005.

© 2024 Society of Thermal Engineers of Serbia. Published by the Vinča Institute of Nuclear Sciences, National Institute of the Republic of Serbia, Belgrade, Serbia. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution-NonCommercial-NoDerivs 4.0 International licence