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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
Source PublicationFUEL
ISSN0016-2361
Volume186Issue:DECPages:204-214
Abstract

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.

KeywordFluidized Bed Combustion High-nitrogen Fuel Distilled Spirited Lees Steam Nox
SubtypeArticle
WOS HeadingsScience & Technology ; Technology
DOI10.1016/j.fuel.2016.08.071
Indexed BySCI
Language英语
WOS KeywordINDUSTRIAL BIOMASS WASTES ; FT-IR SPECTROSCOPY ; DECOUPLING COMBUSTION ; WATER-VAPOR ; REDUCTION ; EMISSION ; PYROLYSIS ; COAL ; CONVERSION ; OXYGEN
WOS Research AreaEnergy & Fuels ; Engineering
WOS SubjectEnergy & Fuels ; Engineering, Chemical
Funding OrganizationNational Natural Science Foundation of China - China(21161140329) ; National Key Technology Development Program of China - China(2012BAC03B05)
WOS IDWOS:000385318600022
Citation statistics
Cited Times:5[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/21567
Collection多相复杂系统国家重点实验室
Affiliation1.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
Recommended Citation
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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