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The recycle of red mud as excellent SCR catalyst for removal of NOx
Li, Changming1; Zeng, Hong1,2; Liu, Pingle2; Yu, Jian1; Guo, Feng1; Xu, Guangwen1,3; Zhang, Zhan-guo4
2017
Source PublicationRSC ADVANCES
ISSN2046-2069
Volume7Issue:84Pages:53622-53630
Abstract

The development of new routes for the utilization of red mud (RM) waste is very urgent due to its huge accumulation and potential environmental harm. By taking advantage of its Fe-Al-Si-Ti composition and excellent plasticity, we developed a ball milling and acid-base neutralization method to reuse the RM waste as Fe-based denitration catalysts. The resulting RM catalysts demonstrate excellent catalytic activity and stability with >90% NO conversion above 400 degrees C in the presence of SO2 and H2O, which is even much better than that of a commercial V-W-Ti catalyst. Characterization data reveal that our treatment eliminates poisonous alkaline metal elements and increases dispersion of RM particles, making the RM active for denitration reactions. The formation of ferric sulfate species with more reducible Fe3+/Fe2+ active sites by a SO2 activation method can further enhance the denitration activity. Moreover, NH3-TPD and in situ IR results demonstrate that the NH3-SCR reaction over the RM catalyst follows the Eley-Rideal mechanism at high temperature and the increased absorption of NH3 for alkaline metal-eliminated or SO2-activated samples accounts for its high DeNO(x) efficiency. The demonstrated feasibility for reusage of the RM as DeNOx catalyst has promising industrial prospects for its extremely low cost, no toxicity, and high efficiency.

SubtypeArticle
WOS HeadingsScience & Technology ; Physical Sciences
DOI10.1039/c7ra10348d
Indexed BySCI
Language英语
WOS KeywordLayered Double Hydroxide ; Low-temperatures ; Reduction ; Nh3 ; Performance ; Oxidation ; Nh3-scr ; Fe ; Ce ; Ti
WOS Research AreaChemistry
WOS SubjectChemistry, Multidisciplinary
Funding OrganizationScience and Technology Service Network Initiative of China(KFJ-SW-STS-149) ; International Science and Technology Cooperation Program of China(2016YFE0128300) ; Natural Science and Foundation of China(21601192) ; Japan Society for the Promotion of Science (JSPS)(P15758)
WOS IDWOS:000416049900072
Citation statistics
Cited Times:4[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/23437
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 100190, Peoples R China
2.Xiangtan Univ, Sch Chem Engn, Xiangtan 411105, Hunan, Peoples R China
3.Shenyang Univ Chem Technol, Inst Ind Chem & Energy Technol, Shenyang 110142, Liaoning, Peoples R China
4.Natl Inst Adv Ind Sci & Technol, 16-1 Onogawa, Tsukuba, Ibaraki 3058569, Japan
Recommended Citation
GB/T 7714
Li, Changming,Zeng, Hong,Liu, Pingle,et al. The recycle of red mud as excellent SCR catalyst for removal of NOx[J]. RSC ADVANCES,2017,7(84):53622-53630.
APA Li, Changming.,Zeng, Hong.,Liu, Pingle.,Yu, Jian.,Guo, Feng.,...&Zhang, Zhan-guo.(2017).The recycle of red mud as excellent SCR catalyst for removal of NOx.RSC ADVANCES,7(84),53622-53630.
MLA Li, Changming,et al."The recycle of red mud as excellent SCR catalyst for removal of NOx".RSC ADVANCES 7.84(2017):53622-53630.
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