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Peroxymonosulfate activated by amorphous particulate MnO2 for mineralization of benzene gas: Redox reaction, weighting analysis, and numerical modelling
Li, Haiwei1; Lee, Shuncheng1; Wang, Zuwu2; Huang, Yu3; Ho, Wingkei4,5; Cui, Long1
2017-05-15
发表期刊CHEMICAL ENGINEERING JOURNAL
卷号316期号:2017页码:61-69
文章类型Article
摘要Amorphous particulate MnO2 (AMO) which features micro-nano hierarchical structure can be viewed as a favorable alternative to crystalline alpha-MnO2 for Peroxymonosulfate (PMS) activation. The former not only is comparatively simple to obtain but also has similar performance on powerful adsorption and catalytic capability. In this paper, the combined use of AMO and PMS oxidizing system showed the paralleled degradation efficiency of benzene gas with 50.5 +/- 3.75%, which was just around 5 percentage points lower than that achieved in the alpha-MnO2&PMS system. Highly stable catalytic activity of the AMO&PMS system exhibited during an ensuing cyclic experiment, averaging at 63.08% for benzene mineralization. Additionally, a novel method of weighting analysis which evaluates the synergetic effects among operating parameters on benzene removal was firstly explored in the nanosized catalyst-based activation system. Through a novel specific reaction drag model for porous media, specific drag coefficients at various testing conditions, k(2), in terms of pressure drop across microporous AMO, were held to establish the correlations between ideal mineralization efficiencies and optimal parameter combinations. A further comparison between laboratory data and model simulations confirmed that, regardless of pH variations, the mineralization rate can be enhanced to around 67.7% at a more higher temperature (45 degrees C) when the con slimed ratio of AMO to PMS leveled off at 0.8, during which time much lower k(2) of 0.24 Pa.min.m/mg would present. (C) 2017 Elsevier B.V. All rights reserved.
关键词Amorphous Particulate Mno2 Peroxymonosulfate Benzene Gas Mineralization Weighting Analysis Numeric Model
WOS标题词Science & Technology ; Technology
DOI10.1016/j.cej.2017.01.070
关键词[WOS]CATALYTIC PHENOL DEGRADATION ; OCTAHEDRAL MOLECULAR-SIEVES ; HETEROGENEOUS ACTIVATION ; LIGHT IRRADIATION ; AQUEOUS-SOLUTIONS ; SULFATE RADICALS ; MANGANESE OXIDES ; POROUS-MEDIA ; OXIDATION ; MECHANISM
收录类别SCI
语种英语
WOS研究方向Engineering
WOS类目Engineering, Environmental ; Engineering, Chemical
WOS记录号WOS:000398985200008
引用统计
被引频次:1[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ieecas.cn/handle/361006/5486
专题粉尘与环境研究室
作者单位1.Hong Kong Polytech Univ, Dept Civil & Environm Engn, Hong Kong, Hong Kong, Peoples R China
2.Wuhan Univ, Dept Environm Engn, Wuhan 430079, Peoples R China
3.Chinese Acad Sci, Key Lab Aerosol Chem & Phys, Inst Earth Environm, Xian 710075, Peoples R China
4.Hong Kong Univ Educ, Dept Sci & Environm Studies, Hong Kong, Hong Kong, Peoples R China
5.Hong Kong Univ Educ, Ctr Educ Environm Sustainabil, Hong Kong, Hong Kong, Peoples R China
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Li, Haiwei,Lee, Shuncheng,Wang, Zuwu,et al. Peroxymonosulfate activated by amorphous particulate MnO2 for mineralization of benzene gas: Redox reaction, weighting analysis, and numerical modelling[J]. CHEMICAL ENGINEERING JOURNAL,2017,316(2017):61-69.
APA Li, Haiwei,Lee, Shuncheng,Wang, Zuwu,Huang, Yu,Ho, Wingkei,&Cui, Long.(2017).Peroxymonosulfate activated by amorphous particulate MnO2 for mineralization of benzene gas: Redox reaction, weighting analysis, and numerical modelling.CHEMICAL ENGINEERING JOURNAL,316(2017),61-69.
MLA Li, Haiwei,et al."Peroxymonosulfate activated by amorphous particulate MnO2 for mineralization of benzene gas: Redox reaction, weighting analysis, and numerical modelling".CHEMICAL ENGINEERING JOURNAL 316.2017(2017):61-69.
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