Citation: Ruo-wei DAI, Rui-dong ZHAO, Zhi-qi WANG, Jian-guang QIN, Tian-ju CHEN, Jin-hu WU. Study on the oxy-fuel co-combustion of coal gangue and semicoke and the pollutants emission characteristics[J]. Journal of Fuel Chemistry and Technology, ;2022, 50(2): 152-159. doi: 10.1016/S1872-5813(21)60132-9 shu

Study on the oxy-fuel co-combustion of coal gangue and semicoke and the pollutants emission characteristics

1.
Key Laboratory of Biofuels, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao 266101, China
2.
University of Chinese Academy of Sciences, Beijing 100049, China

Corresponding author: Rui-dong ZHAO, zhaord@qibebt.ac.cn
Received Date: 7 May 2021
Revised Date: 1 July 2021

Figures(10)

The oxy-fuel co-combustion of coal gangue and semicoke and the pollutants emission characteristics were studied by thermogravimetric analyzer and tube furnace experiments. The effects of semicoke blending ratios, O₂ concentration and temperature were investigated. The results showed that the combustion performance of blended fuel could be improved with the addition of semicoke and the increase of O₂ concentration. The maximum ignition and burnout index were obtained when semicoke blending ratio was 75%. The x_COand \begin{document}${x_{{\rm{S}}{{\rm{O}}_{\rm{2}}}}} $\end{document} gradually decreased with the increase of semicoke blending ratios. As the increase of temperature, the x_COdecreased, \begin{document}${x_{{\rm{S}}{{\rm{O}}_{\rm{2}}}}} $\end{document} increased while x_NO firstly increased then decreased or slowly grew. The NO emission could be reduced with the addition of semicoke when the temperature was 900 ℃. However, it would aggravate NO emission at other temperatures. With the increase of O₂ concentration, the x_CO decreased, x_NO increased while \begin{document}${x_{{\rm{S}}{{\rm{O}}_{\rm{2}}}}} $\end{document} firstly decreased and then increased. The minimum \begin{document}${x_{{\rm{S}}{{\rm{O}}_{\rm{2}}}}} $\end{document} was obtained when O₂ concentration was 20%.
- coal gangue,
- semicoke,
- oxy-combustion,
- combustion characteristics,
- pollutants emission characteristics
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