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Citation: ZHENG Min, SHEN Lai-hong, FENG Xiao-qiong. Study on chemical-looping combustion of coal with CaSO4 oxygen carrier assisted by CaO addition[J]. Journal of Fuel Chemistry and Technology, ;2014, 42(4): 399-407. shu

Study on chemical-looping combustion of coal with CaSO4 oxygen carrier assisted by CaO addition

  • 1.

    1. State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization, Kunming University of Science and Technology, Kunming 650093, China;

  • Corresponding author: ZHENG Min, 
  • Received Date: 29 October 2013
    Available Online: 23 December 2013

    Fund Project: 国家自然科学基金(51306084,51276037,51174105)。 (51306084,51276037,51174105)

  • The reactivity between the CaSO4 oxygen carrier with CaO additive and coal under steam atmosphere was studied in a fluidized bed reactor. The experimental results show that the addition of CaO can improve the performance of both coal gasification and CaSO4 reduction, and increase the reaction rate of coal gasification and CaSO4 reduction and the CO2 generating rate. However, the catalysis of CaO drops as the reaction temperature rises. And the optimum reaction temperature is 900 ℃, at which the releases of gaseous sulfides are remarkably decreased by 63.19% and 27.37% for SO2 and H2S, respectively, as the molar ratio of CaO to CaSO4 is 1.18. Meanwhile, the amount of CO2 absorbed by CaO can be controlled to less than 2%.
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