Synergetic NO reduction by biomass pyrolysis products simulating their reburning in circulating fluidized bed decoupling combustion

doi:10.1016/j.cjche.2018.07.002

中国化学工程学报 ›› 2019, Vol. 27 ›› Issue (7): 1680-1689.DOI: 10.1016/j.cjche.2018.07.002

• Energy, Resources and Environmental Technology • 上一篇下一篇

Synergetic NO reduction by biomass pyrolysis products simulating their reburning in circulating fluidized bed decoupling combustion

Hai-Sam Do^1,2, Tuyet-Suong Tran^1,2, Zhennan Han³, Xi Zeng¹, Shiqiu Gao¹, Guangwen Xu^1,3

1 State Key Laboratory of Multi-phase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China;
2 University of Chinese Academy of Sciences, Beijing 100049, China;
3 Institute of Industrial Chemistry and Energy Technology, Shenyang University of Chemical Technology, Shenyang 110142, China

收稿日期:2018-03-05 出版日期:2019-07-28 发布日期:2019-10-14
通讯作者: Guangwen Xu

Synergetic NO reduction by biomass pyrolysis products simulating their reburning in circulating fluidized bed decoupling combustion

Hai-Sam Do^1,2, Tuyet-Suong Tran^1,2, Zhennan Han³, Xi Zeng¹, Shiqiu Gao¹, Guangwen Xu^1,3

1 State Key Laboratory of Multi-phase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China;
2 University of Chinese Academy of Sciences, Beijing 100049, China;
3 Institute of Industrial Chemistry and Energy Technology, Shenyang University of Chemical Technology, Shenyang 110142, China

Received:2018-03-05 Online:2019-07-28 Published:2019-10-14
Contact: Guangwen Xu

摘要/Abstract

摘要： The present work investigated the synergetic effect of pyrolysis-derived char, tar and gas (py-gas) on NO reduction, which may occur in circulating fluidized-bed decoupling combustion (CFBDC) system treating N-rich fuel. Experiments were carried out in a lab-scale drop-tube reactor for NO reduction by some binary mixtures of reagents including char/py-gas, tar/py-gas and tar/char. At a specified total mass rate of 0.15 g·min^-1 for NO-reduction reagent, the char/py-gas (binary reagent) enabled the best synergetic NO reduction in comparison with the others. There existed effective interactions between char and some species in py-gas (i.e., H₂, C_xH_y) during NO reduction by pyrolysis products, meanwhile the tar/py-gas or tar/char mixture only caused a positive effect when tar proportion was necessarily lowered to about 26%. On the other hand, the synergetic effects were not improved for all tested binary reagents by increasing the reaction temperature and residence time.

关键词: Biomass, Pyrolysis, Circulating fluidized bed, NO reduction, Synergetic effect, Decoupling combustion

Abstract: The present work investigated the synergetic effect of pyrolysis-derived char, tar and gas (py-gas) on NO reduction, which may occur in circulating fluidized-bed decoupling combustion (CFBDC) system treating N-rich fuel. Experiments were carried out in a lab-scale drop-tube reactor for NO reduction by some binary mixtures of reagents including char/py-gas, tar/py-gas and tar/char. At a specified total mass rate of 0.15 g·min^-1 for NO-reduction reagent, the char/py-gas (binary reagent) enabled the best synergetic NO reduction in comparison with the others. There existed effective interactions between char and some species in py-gas (i.e., H₂, C_xH_y) during NO reduction by pyrolysis products, meanwhile the tar/py-gas or tar/char mixture only caused a positive effect when tar proportion was necessarily lowered to about 26%. On the other hand, the synergetic effects were not improved for all tested binary reagents by increasing the reaction temperature and residence time.

Key words: Biomass, Pyrolysis, Circulating fluidized bed, NO reduction, Synergetic effect, Decoupling combustion

Hai-Sam Do, Tuyet-Suong Tran, Zhennan Han, Xi Zeng, Shiqiu Gao, Guangwen Xu. Synergetic NO reduction by biomass pyrolysis products simulating their reburning in circulating fluidized bed decoupling combustion[J]. 中国化学工程学报, 2019, 27(7): 1680-1689.

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Synergetic NO reduction by biomass pyrolysis products simulating their reburning in circulating fluidized bed decoupling combustion

Synergetic NO reduction by biomass pyrolysis products simulating their reburning in circulating fluidized bed decoupling combustion

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