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3 results on '"Mengxue Yin"'

1. Insights into the mechanism of low-temperature H

Author

Mengxue, Yin, Zhichao, Yun, Feiyue, Fan, Suresh C, Pillai, Zhihao, Wu, Yan, Zheng, Long, Zhao, Hailong, Wang, and Hong, Hou

Subjects
Zinc, Photoelectron Spectroscopy, Temperature, Humans, Oxidation-Reduction, Catalysis
Abstract

Odor pollution caused by toxic chemicals with low human olfactory thresholds, such as hydrogen sulfide (H

Published
2021

2. Insights into the mechanism of low-temperature H2S oxidation over Zn–Cu/Al2O3 catalyst

Author

Hailong Wang, Zhichao Yun, Suresh C. Pillai, Feiyue Fan, Hong Hou, Yan Zheng, Mengxue Yin, Long Zhao, and Zhihao Wu

Subjects
Pollution, Environmental Engineering, Health, Toxicology and Mutagenesis, Hydrogen sulfide, media_common.quotation_subject, Public Health, Environmental and Occupational Health, General Medicine, General Chemistry, Photochemistry, Catalysis, chemistry.chemical_compound, chemistry, Odor, Catalytic oxidation, Environmental Chemistry, Mechanism (sociology), media_common
Abstract

Odor pollution caused by toxic chemicals with low human olfactory thresholds, such as hydrogen sulfide (H2S), has become a major cause of environmental grievance world-wide. Although the low-temperature (

Published
2022

3. Insight into degradation mechanism of PCBs from thermal desorption off-gas over iron-based catalysts

Author

Mengxue Yin, Zhichao Yun, Hong Hou, Zhanbin Huang, Zhihao Wu, Long Zhao, and Feiyue Fan

Subjects
Environmental Engineering, Chemistry, Superoxide, Iron, Health, Toxicology and Mutagenesis, Inorganic chemistry, Public Health, Environmental and Occupational Health, Thermal desorption, General Medicine, General Chemistry, Mass spectrometry, Polychlorinated Biphenyls, Pollution, Catalysis, chemistry.chemical_compound, Outgassing, Reductive dechlorination, Environmental Chemistry, Degradation (geology), Density functional theory, Chlorine, Oxidation-Reduction
Abstract

Iron-based catalysts were developed to achieve the hydrodechlorination (HDC)/oxidation of polychlorinated biphenyls (PCBs) from thermal desorption off-gas, and Fe3O4/γ-Al2O3 showed higher dechlorination efficiency than Fe2O3/γ-Al2O3. The optimal Fe loading resulted in 95.5% degradation efficiency and 76.9% toxicity reduction of gaseous PCBs, and the optimal Fe3O4/γ-Al2O3 exhibited excellent stability during a 60-h test. The gas chromatography–mass spectrometry analysis of intermediate products indicated the presence of two competitive degradation pathways, namely, hydrodechlorination and oxidation with Fe3O4/γ-Al2O3 as catalyst. During the first stage (reductive dechlorination), the reductive activity of iron-based catalysts was effectively enhanced in the presence of water, which was confirmed by density functional theory (DFT) calculations. The removal of chlorine atoms was found in the order of meta > para > ortho. During the second stage (oxidation), hydroxyl and superoxide anion radicals were found to attack PCBs on the surface of Fe3O4/γ-Al2O3. This study provides an insight into the HDC and oxidation mechanism of gaseous PCBs over iron-based catalysts.

Published
2022

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