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Ren Xuejiao, Xia Jupei, Zhang Zhaoshu. Thermodynamic analysis of reductive decomposition for phosphogypsum[J]. Chinese Journal of Environmental Engineering, 2013, 7(3): 1128-1132.
Citation: Ren Xuejiao, Xia Jupei, Zhang Zhaoshu. Thermodynamic analysis of reductive decomposition for phosphogypsum[J]. Chinese Journal of Environmental Engineering, 2013, 7(3): 1128-1132.
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Thermodynamic analysis of reductive decomposition for phosphogypsum

  • 1.

    Faculty of Chemical Engineering, Kunming University of Science and Technology, Kunming 650500, China

  • Received Date: 05/04/2012
    Accepted Date: 11/01/2012
    Available Online: 18/03/2013
    Fund Project:
  • Phosphogypsum was the solid waste discharged from the high concentration phosphate fertilizer industry. Thermodynamic calculation software HSC Chemistry 5 was used to contrast and analysis the reductive reaction of phosphogypsum with coke, sulfur, hydrogen and carbon monoxide. The relationships of reducing agent and decomposition temperature, equilibrium constant and energy consumption were explored. The results showed that with CO as reducing agent, the reducing reaction was easiest and the energy consumption was lowest; whether using the above reducing agent, it was easier for CaSO4 to be decomposed into CaS than into CaO.
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Thermodynamic analysis of reductive decomposition for phosphogypsum

  • Received Date: 05/04/2012
  • Accepted Date: 11/01/2012
  • Available Online: 18/03/2013
Fund Project:

Abstract: Phosphogypsum was the solid waste discharged from the high concentration phosphate fertilizer industry. Thermodynamic calculation software HSC Chemistry 5 was used to contrast and analysis the reductive reaction of phosphogypsum with coke, sulfur, hydrogen and carbon monoxide. The relationships of reducing agent and decomposition temperature, equilibrium constant and energy consumption were explored. The results showed that with CO as reducing agent, the reducing reaction was easiest and the energy consumption was lowest; whether using the above reducing agent, it was easier for CaSO4 to be decomposed into CaS than into CaO.

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