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A pilot scale study on co-capture of SO2 and NO x in O2/CO2 recycled coal combustion and techno-economic evaluation

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Abstract

This paper presents the study on co-capture of SO2 and NO x in O2/CO2 recycled coal combustion in a pilot scale facility with the heat input of 0.3 MW by using high-sulphur lean coal. Detailed comparison of SO2 and NO x emission indexes and desulphurization and denitration rates have been made among three working conditions of O2/CO2, O2/CO2 with limestone injection (O2/CO2+Ca) and O2/RFG (recycled flue gas) with limestone injection (O2/RFG+Ca). Combustion in air was performed as a base case. Results showed that in the O2/RFG with limestone injection, desulphurization and denitration rates could reach up to 96% and 89%, respectively. Limestone injection under the high-CO2 atmosphere caused a significant reduction on SO2 emission and NO x emission as well. This indicated O2/CO2 recycled coal combustion could reduce the investment on the flue gas purification. The techno-economic evaluation indicated that Oxy-combustion technique is not only feasible for CO2 emission control based on existing power plants but is also cost-effective.

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Authors and Affiliations

  1. Stated Key Laboratory of Coal Combustion, Huazhong University of Science and Technology, Wuhan, 30074, China

    Chun Zou, ZhiJun Huang, Jie Xiong, Peng Guo & ChuGuang Zheng

Authors
  1. Chun Zou
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  2. ZhiJun Huang
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  3. Jie Xiong
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  4. Peng Guo
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  5. ChuGuang Zheng
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Corresponding author

Correspondence to Chun Zou.

Additional information

This work was supported by the National Basic Research Program of China (‘973’ Project) (Grant No. 2006CB705806) and the National Natural Science Foundation of China (Grant Nos. 50936001 and 50721005).

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Zou, C., Huang, Z., Xiong, J. et al. A pilot scale study on co-capture of SO2 and NO x in O2/CO2 recycled coal combustion and techno-economic evaluation. Sci. China Ser. E-Technol. Sci. 53, 155–159 (2010). https://doi.org/10.1007/s11431-009-0417-5

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  • DOI: https://doi.org/10.1007/s11431-009-0417-5

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