Please use this identifier to cite or link to this item:
http://hdl.handle.net/10397/66047
Title: | Peroxymonosulfate activated by amorphous particulate MnO2 for mineralization of benzene gas : redox reaction, weighting analysis, and numerical modelling | Authors: | Li, HW Lee, SC Wang, ZW Huang, Y Ho, WK Cui, L |
Issue Date: | May-2017 | Source: | Chemical engineering journal, May 2017, v. 316, p. 61-69 | Abstract: | Amorphous particulate MnO2 (AMO) which features micro-nano hierarchical structure can be viewed as a favorable alternative to crystalline α-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 α-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, k2, 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 °C) when the consumed ratio of AMO to PMS leveled off at 0.8, during which time much lower k2 of 0.24 Pa·min·m/mg would present. | Keywords: | Amorphous particulate MnO2 Benzene gas Mineralization Numeric model Peroxymonosulfate Weighting analysis |
Publisher: | Elsevier | Journal: | Chemical engineering journal | EISSN: | 1385-8947 | DOI: | 10.1016/j.cej.2017.01.070 | Rights: | © 2017 Elsevier B.V. All rights reserved. © 2017. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/. The following publication Li, H., Lee, S., Wang, Z., Huang, Y., Ho, W., & Cui, L. (2017). Peroxymonosulfate activated by amorphous particulate MnO2 for mineralization of benzene gas: Redox reaction, weighting analysis, and numerical modelling. Chemical Engineering Journal, 316, 61-69 is available at https://doi.org/10.1016/j.cej.2017.01.070 |
Appears in Collections: | Journal/Magazine Article |
Files in This Item:
File | Description | Size | Format | |
---|---|---|---|---|
Li_Peroxymonosulfate_Activated_By.pdf | Pre-Published version | 1.31 MB | Adobe PDF | View/Open |
Page views
142
Last Week
0
0
Last month
Citations as of Sep 22, 2024
Downloads
29
Citations as of Sep 22, 2024
SCOPUSTM
Citations
13
Last Week
0
0
Last month
Citations as of Sep 26, 2024
WEB OF SCIENCETM
Citations
13
Last Week
0
0
Last month
Citations as of Sep 26, 2024
Google ScholarTM
Check
Altmetric
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.