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On the Nature of Nitrogen-Containing Groups in the SCR of NO Over Functionalized Activated Coke
Li, Yuran; Lin, Yuting; Cheng, Chungui; Hao, Junke; Zhu, Tingyu
2020-05-01
Source PublicationWASTE AND BIOMASS VALORIZATION
ISSN1877-2641
Volume11Issue:5Pages:1691-1699
AbstractTo improve the denitrification efficiency for the selective catalytic reduction of NO with NH3 in the flue gas purification process, a low-rank activated coke (AC) was treated with ammonia (NH3.H2O) solution or nitric acid (HNO3) solution to increase the content and type of nitrogen-containing functional groups, and then the role of nitrogen-containing functional groups in the reduction of NO was analyzed. The modified AC samples were characterized by N-2 adsorption/desorption to determine the pore structures and by Fourier transform infrared spectroscopy and X-ray photoelectron spectroscopy to detect the surface functional groups. After modification, the content of oxygen-containing functional groups on the AC surface increased, including quinone, lactone and carboxyl, which are favorable for SO2 adsorption. Meanwhile, the type and content of nitrogen-containing functional groups on the AC surface changed; these groups fall into two categories: active groups and non-active groups. Before and after the denitrification process, the regular changes in the content of active and non-active groups showed that the active groups with pyrrole-like or pyridine-like structures can promote NO adsorption and then strengthen the denitrification. On the other hand, active groups may be reduced by NH3 or oxidized by O-2, referring to side reactions, to generate non-active groups such as nitro, nitrate, amine and imine. More importantly, the role of nitrogen-containing functional groups was identified in the denitrification process. This chemical modification method is effective for improving the performance of low-cost AC since the employed chemicals are commercially available.Graphical
KeywordActivated coke Flue gas denitrification Nitrogen-containing groups SCR
DOI10.1007/s12649-018-0428-1
Language英语
WOS KeywordSELECTIVE CATALYTIC-REDUCTION ; SEMI-COKE ; NITRIC-OXIDE ; CARBON ; REMOVAL ; OXYGEN ; ADSORPTION ; SO2 ; NH3 ; DESULFURIZATION
WOS Research AreaEnvironmental Sciences & Ecology
WOS SubjectEnvironmental Sciences
WOS IDWOS:000523383800005
PublisherSPRINGER
Citation statistics
Cited Times:4[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/39909
Collection中国科学院过程工程研究所
Corresponding AuthorLi, Yuran; Zhu, Tingyu
AffiliationChinese Acad Sci, Beijing Engn Res Ctr Proc Pollut Control, Inst Proc Engn, Natl Engn Lab Hydromet Cleaner Prod Technol, Beijing 100190, Peoples R China
Recommended Citation
GB/T 7714
Li, Yuran,Lin, Yuting,Cheng, Chungui,et al. On the Nature of Nitrogen-Containing Groups in the SCR of NO Over Functionalized Activated Coke[J]. WASTE AND BIOMASS VALORIZATION,2020,11(5):1691-1699.
APA Li, Yuran,Lin, Yuting,Cheng, Chungui,Hao, Junke,&Zhu, Tingyu.(2020).On the Nature of Nitrogen-Containing Groups in the SCR of NO Over Functionalized Activated Coke.WASTE AND BIOMASS VALORIZATION,11(5),1691-1699.
MLA Li, Yuran,et al."On the Nature of Nitrogen-Containing Groups in the SCR of NO Over Functionalized Activated Coke".WASTE AND BIOMASS VALORIZATION 11.5(2020):1691-1699.
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