Ping-Chin Chiu1, Young Ku 1, You-Lin Wu1, Hsuan-Chih Wu1, Yu-Lin Kuo2, Yao-Hsuan Tseng1

  • 1 Department of Chemical Engineering, National Taiwan University of Science and Technology, No. 43, Sec. 4, Keelung Rd., Da’an Dist., Taipei 106, Taiwan
  • 2 Department of Mechanical Engineering, National Taiwan University of Science and Technology, No.43, Sec. 4, Keelung Rd., Da’an Dist., Taipei 106, Taiwan

Received: April 24, 2013
Revised: August 27, 2013
Accepted: August 27, 2013
Download Citation: ||https://doi.org/10.4209/aaqr.2013.04.0135 

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Cite this article:
Chiu, P.C., Ku, Y., Wu, Y.L., Wu, H.C., Kuo, Y.L. and Tseng, Y.H. (2014). Characterization and Evaluation of Prepared Fe2O3/Al2O3 Oxygen Carriers for Chemical Looping Process. Aerosol Air Qual. Res. 14: 981-990. https://doi.org/10.4209/aaqr.2013.04.0135


 

ABSTRACT


Alumina supported Fe2O3 was prepared to evaluate its feasibility as an oxygen carrier for chemical looping using a thermogravimetric analyzer (TGA) and fixed bed reactor. Fe2O3/Al2O3 particles containing 60 wt% Fe2O3 and sintered at 1300°C demonstrated reasonable oxygen conversion. The reduction mechanism of Fe2O3/Al2O3 oxygen carriers was proposed based on the thermogravimetric analysis and XRD characterization. FeAl2O4 is formed and can serve as a supporting material as well as oxygen carrier in practical operations by using a moving bed reactor. The prepared Fe2O3/Al2O3 oxygen carriers demonstrated high CO2 yields in relation to syngas and methane combustion in the fixed bed reactor operated at temperatures higher than 500 and 850°C, respectively. Moreover, hydrogen generation was demonstrated to be feasible by steam oxidation with reduced Fe2O3/Al2O3 oxygen carriers for experiments conducted at temperatures above 800°C. The crush strength and TGA of Fe2O3/Al2O3 were examined, and the results showed that they had an appropriate crush strength and reasonable reactivity as oxygen carriers for use in a chemical looping process.


Keywords: Chemical looping process; Fe2O3/Al2O3 Oxygen carrier; TGA; Fixed bed reactor


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