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NOx precursors evolving during rapid pyrolysis of lignocellulosic industrial biomass wastes
Zhan, Hao1,2; Yin, Xiuli1; Huang, Yanqin1; Yuan, Hongyou1; Wu, Chuangzhi1
2017-11-01
Source PublicationFUEL
Volume207Pages:438-448
AbstractNitrogen functionalities play an important role in the formation of NOx precursors during pyrolysis of lignocellulosic industrial biomass wastes (IBWs) while the influences haven't been clarified yet. Based on the rapid pyrolysis of three typical ones - medium-density fiberboard waste (MFW), Chinese herb residue (CHR) and tea stalk waste (TSW) in a horizontal tubular quartz reactor, characteristics of NOx precursors and their relationships with nitrogen functionalities at different temperatures were elucidated with the help of spectrophotometry, XPS and GC-MS technologies. The results demonstrated that the overwhelming nitrogen functionalities in lignocellulosic IBWs were amide-N types with sequential thermal stabilities of caffeine > protein > polyamide. At 300-550 degrees C, more stable amide-N tended to form heterocyclic-N in chars while more labile one was inclined to produce new kinds of amine-N in tars and NH3-N (12-17 wt% yield) in gases. Meanwhile, the weak dehydrogenation (into HCN and nitrile-N) and the sustained polymerization of amine-N (into heterocyclic-N) in tars also occurred at this stage. At high temperatures (> 550 degrees C), HCN-N (10-16 wt% yield) was produced by ring scission of heterocyclic-N in tars while 70% of NH3-N (similar to 16 wt% total yield) was mainly generated by hydrogenation of heterocyclic-N in chars. In addition, the remaining 30% of NH3-N yield was attributed to the simultaneous thermal cracking of amine-N. Despite the similar evolution pathways of amide-N for three lignocellulosic IBWs, NH3-N yield was produced with sequence of MFW > CHR > TSW at low temperatures while HCN-N yield was generated with the opposite order at high temperatures due to different thermal stabilities of amide-N types. It might be concluded that thermal stabilities of amide-N together with subsequent nitrogen functionalities evolved were key factors controlling the formation of NOx precursors during lignocellulosic IBWs pyrolysis. (C) 2017 Elsevier Ltd. All rights reserved.
SubtypeArticle
KeywordLignocellulosic Ibws Nitrogen Functionalities Nox Precursors Pyrolysis Thermal Stabilities Amide-n
WOS HeadingsScience & Technology ; Technology
DOI10.1016/j.fuel.2017.06.046
WOS Subject ExtendedEnergy & Fuels ; Engineering
WOS KeywordSEWAGE-SLUDGE ; NITROGEN TRANSFORMATION ; MICROWAVE PYROLYSIS ; N2O PRECURSORS ; GASIFICATION ; COAL ; EVOLUTION ; NH3 ; HCN ; PROTEIN
Indexed BySCI
Language英语
Funding OrganizationNational Natural Science Foundation of China(51676195 ; Guangdong Provincial Science and Technology Plan Project(2016A010104011) ; Analytical Center of Guangzhou Institute of Energy Conversion (CAS) ; 51661145022)
WOS SubjectEnergy & Fuels ; Engineering, Chemical
WOS IDWOS:000405809300045
Citation statistics
Document Type期刊论文
Identifierhttp://ir.giec.ac.cn/handle/344007/14179
Collection中国科学院广州能源研究所
Affiliation1.Chinese Acad Sci, Guangzhou Inst Energy Convers, Guangdong Key Lab New & Renewable Energy Res & De, Key Lab Renewable Energy, Guangzhou 510640, Guangdong, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
First Author AffilicationGuangZhou Institute of Energy Conversion,Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Zhan, Hao,Yin, Xiuli,Huang, Yanqin,et al. NOx precursors evolving during rapid pyrolysis of lignocellulosic industrial biomass wastes[J]. FUEL,2017,207:438-448.
APA Zhan, Hao,Yin, Xiuli,Huang, Yanqin,Yuan, Hongyou,&Wu, Chuangzhi.(2017).NOx precursors evolving during rapid pyrolysis of lignocellulosic industrial biomass wastes.FUEL,207,438-448.
MLA Zhan, Hao,et al."NOx precursors evolving during rapid pyrolysis of lignocellulosic industrial biomass wastes".FUEL 207(2017):438-448.
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