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Journal of Materials Science

, Volume 31, Issue 7, pp 1873–1877 | Cite as

Mixed waste ferrite as a novel sorbent for carbon dioxide derived from flue gases

  • R. K. Mehta
  • K. Yang
  • M. Misra
Article

Abstract

Ferrite is a potential sorbent for flue gases such as CO2, H2S and SO2. This paper discusses the adsorption and decomposition of CO2 into carbon by hydrogen-activated waste ferrites prepared from Berkeley Pit acid mine water (Butte, MT). The decomposition effectiveness of these waste ferrites was studied at 300 °C and compared with the synthetic magnetite obtained from ferrous sulfate solution in our laboratory. The decomposition was measured by two methods: indirectly by measuring the adsorption rate of CO2 and directly by analysing the carbon deposited on the samples. The results indicated that the mixed waste ferrite had good affinity for the adsorption and decomposition. The CO2 decomposition data of both sorbents fitted the first-order reaction kinetics. Even though the surface area of the magnetite was higher than that of waste ferrite, the CO2 decomposition rate of the waste ferrite was estimated to be 2.5 times higher than that of magnetite under identical conditions. The carbon analysis deposited on the sample indicated that the CO2 was 100% decomposed into carbon and other carbon/hydrogen compounds by the waste ferrite, whereas the conversion was 43% by the magnetite. In terms of specific adsorption of carbon, ferrite was three to five times more efficient than magnetite.

Keywords

Ferrite Magnetite Decomposition Rate Sulfate Solution Ferrous Sulfate 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Chapman & Hall 1996

Authors and Affiliations

  • R. K. Mehta
    • 1
  • K. Yang
    • 1
  • M. Misra
    • 1
  1. 1.Department of Chemical and Metallurgical Engineering, Mackay School of MinesUniversity of NevadaRenoUSA

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