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Fluidized bed combustion in steam-rich atmospheres for high-nitrogen fuel: Nitrogen distribution in char and volatile and their contributions to NOx
Zhang, Guangyi1; Zhu, Chuanqiang1,2; Ge, Yaxin1,2; Liu, Xiaoxing1; Xu, Guangwen1
2016-12-15
发表期刊FUEL
ISSN0016-2361
卷号186期号:DEC页码:204-214
摘要

This article is devoted to investigating the contributions of char-N and volatile-N to NOx formation from fluidized bed combustion of high-nitrogen fuel (distilled spirited lees (DSL)) in steam-rich atmospheres, to make clear the effect of steam on NOx reduction and the related mechanisms. The char and the volatile prepared by pyrolysis of the DSL were subjected to combustion tests in a fluidized bed to compare their NOx emission characteristics with that from combustion of the raw DSL, respectively. The results showed that with additional steam present in pyrolysis atmosphere, significantly more gas products were formed and bigger proportions of the total fuel nitrogen entered in the gas products. Additional steam also boosted generation of aliphatic hydrocarbons containing most of the nitrogen in the tar, which was helpful for reducing NOx. The presence of additional steam accelerated the release of the volatile and remarkably increased the yield of reducing pyrolysis gases and meanwhile changed the peak release sequence of H-2, to facilitate NOx reduction. With increasing the mass ratio of steam to fuel (S/F), the total NOx from the DSL combustion at 900 degrees C in 25 vol.% O-2 atmosphere and the conversion ratio of the char-N into NOx decreased but the contribution ratio of the char-N to the total NOx increased. When the S/F ratio exceeded 0.8 the char-N contributed more to the total NOx than the volatile-N did. (C) 2016 Elsevier Ltd. All rights reserved.

关键词Fluidized Bed Combustion High-nitrogen Fuel Distilled Spirited Lees Steam Nox
文章类型Article
WOS标题词Science & Technology ; Technology
DOI10.1016/j.fuel.2016.08.071
收录类别SCI
语种英语
关键词[WOS]INDUSTRIAL BIOMASS WASTES ; FT-IR SPECTROSCOPY ; DECOUPLING COMBUSTION ; WATER-VAPOR ; REDUCTION ; EMISSION ; PYROLYSIS ; COAL ; CONVERSION ; OXYGEN
WOS研究方向Energy & Fuels ; Engineering
WOS类目Energy & Fuels ; Engineering, Chemical
项目资助者National Natural Science Foundation of China - China(21161140329) ; National Key Technology Development Program of China - China(2012BAC03B05)
WOS记录号WOS:000385318600022
引用统计
被引频次:4[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ipe.ac.cn/handle/122111/21567
专题多相复杂系统国家重点实验室
作者单位1.Chinese Acad Sci, Inst Proc Engn, State Key Lab Multiphase Complex Syst, Beijing 100091, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式
GB/T 7714
Zhang, Guangyi,Zhu, Chuanqiang,Ge, Yaxin,et al. Fluidized bed combustion in steam-rich atmospheres for high-nitrogen fuel: Nitrogen distribution in char and volatile and their contributions to NOx[J]. FUEL,2016,186(DEC):204-214.
APA Zhang, Guangyi,Zhu, Chuanqiang,Ge, Yaxin,Liu, Xiaoxing,&Xu, Guangwen.(2016).Fluidized bed combustion in steam-rich atmospheres for high-nitrogen fuel: Nitrogen distribution in char and volatile and their contributions to NOx.FUEL,186(DEC),204-214.
MLA Zhang, Guangyi,et al."Fluidized bed combustion in steam-rich atmospheres for high-nitrogen fuel: Nitrogen distribution in char and volatile and their contributions to NOx".FUEL 186.DEC(2016):204-214.
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