Conversion of Organic Matter in Coal by Photocatalytic Oxidation with H2O2 over SFC/TiO2 in Isolated Oxygen System

Shenfu bituminous coal (SFBC), Geting coal (GTC), Shengli lignite (SLL), and Holingola coal (HLGLC) were oxidized by UV light radiation with aqueous H2O2 over SFC/TiO2 in a closed suspension system (CSS) to understand structural characteristics of 4 typical Chinese coals. Raw and oxidized coals were...

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Bibliographic Details
Published in:Journal of chemistry 2019, Vol.2019 (2019), p.1-12
Main Authors: Wei, Xian-Yong, Su, Ling, Fu, Hong, Wang, Jun-Qiang, Zhang, Shu-hui, Zhao, Pei-Zhi, Wang, Yu-Gao, Zong, Zhi-Min, Xie, Heng-Shen, Liang, Shuang-Hua
Format: Article
Language:English
Subjects:
Acetaldehyde
Acetic acid
Acetone
Alcohols
Alkanes
Aqueous solutions
Bituminous coal
Carbon
Catalytic oxidation
Chain branching
Coal
Esters
Fourier transforms
Gas chromatography
Hydrogen atoms
Hydrogen peroxide
Ketones
Light irradiation
Lignite
Organic compounds
Organic matter
Oxidation
Photocatalysis
Physical chemistry
Science
Suspension systems
Titanium dioxide
Ultraviolet radiation
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Summary:Shenfu bituminous coal (SFBC), Geting coal (GTC), Shengli lignite (SLL), and Holingola coal (HLGLC) were oxidized by UV light radiation with aqueous H2O2 over SFC/TiO2 in a closed suspension system (CSS) to understand structural characteristics of 4 typical Chinese coals. Raw and oxidized coals were dried and extracted with acetone thoroughly to ensure residue extraction. Meanwhile, the extracts were analyzed using a gas chromatograph/mass spectrometer. The results show that organic matters (OMs) in coals can be converted into a large number of oxygen-containing organic compounds (OCOCs), mainly containing ketones, esters, alcohols, etc. Oxidizing species such as hydroxyls, hydroperoxyl, and alkyl radicals are excited by light irradiation and substitute for hydrogen atoms of methyls and methylenes of acenes or branched-chain alkanes in coals. Acetic acid and acetaldehyde can be formed and dissolved in aqueous solution in the oxidation reaction. The yields can be improved with the enhancement of the oxidation effect.
ISSN:2090-9063
2090-9071
DOI:10.1155/2019/1768351