Study on chemical-looping combustion of coal with CaSO<sub>4</sub> oxygen carrier assisted by CaO addition

ZHENG Min; SHEN Lai-hong; FENG Xiao-qiong

Volume 42 Issue 04

Apr. 2014

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Article Navigation > Journal of Fuel Chemistry and Technology > 2014 > 42(04): 399-407

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(04): 399-407.

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(04): 399-407.

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

1.
State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization, Kunming University of Science and Technology, Kunming 650093, China;
2.
Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education, Southeast University, Nanjing 210096, China

Received Date: 2013-10-29
Rev Recd Date: 2013-12-23
Publish Date: 2014-04-30

Abstract

Abstract

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%.
- chemical-looping combustion (CLC),
- CaSO₄ oxygen carrier,
- CaO additive,
- suppression of sulfur release,
- CO₂ absorption

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References(22)

References

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