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Energies 2018, 11(2), 337; https://doi.org/10.3390/en11020337

NOx and SO2 Emissions during Co-Combustion of RDF and Anthracite in the Environment of Precalciner

1,2
,
1,3
,
1,2,* and 1,2
1
State Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology, Wuhan 430070, China
2
School of Materials Science and Engineering, Wuhan University of Technology, Wuhan 430070, China
3
Research and Test Center of Materials, Wuhan University of Technology, Wuhan 430070, China
*
Author to whom correspondence should be addressed.
Received: 27 December 2017 / Revised: 30 January 2018 / Accepted: 30 January 2018 / Published: 2 February 2018
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Abstract

Based on the temperature and O2 concentration in the cement precalciner, co-combustion of anthracite and Refuse Derived Fuel (RDF) were investigated using a thermogravimetric analyzer (TGA) and a double furnaces reactor. Both the TGA and double furnaces reactor results indicated that the co-combustion characteristics were the linear additive effect in the devolatilization stage, while it was the synergistic effect in the char combustion stage. During co-combustion, at 900 °C, NOx released rapidly during the devolatilization stage, but in the char combustion stage the NOx formation were inhibited; at 800 °C, a large amount of CO formed, which could reduce the NOx. In general, at 900 °C and 800 °C, the application of co-combustion could lower the NOx emission yield and lower the NOx conversion. By combining the combustion characteristics with the XRD results, it was indicated that during co-combustion, at 800 °C, the SO2 formation reaction was inhibited, and the SO2 yield and conversion were quite low. View Full-Text
Keywords: NOx; SO2; co-combustion; RDF; anthracite; precalciner NOx; SO2; co-combustion; RDF; anthracite; precalciner
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Chen, X.; Xie, J.; Mei, S.; He, F. NOx and SO2 Emissions during Co-Combustion of RDF and Anthracite in the Environment of Precalciner. Energies 2018, 11, 337.

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