Photocatalytic Oxidation of Shenfu Bituminous Coal and Xilinhaote Lignite with H2O2 over TiO2

2011 ◽  
Vol 233-235 ◽  
pp. 1684-1689 ◽  
Author(s):  
Heng Shen Xie ◽  
Zhi Min Zong ◽  
Qing Wei ◽  
Pei Zhi Zhao ◽  
Jian Jun Zhao ◽  
...  
Keyword(s):  
Hydrogen Peroxide ◽  
Titanium Dioxide ◽  
Catalytic Oxidation ◽  
Photocatalytic Oxidation ◽  
Bituminous Coal ◽  
Straight Chain ◽  
Photo Catalytic Oxidation ◽  
Alkyl Side Chains ◽  
Lignite Coal ◽  
Oxidation Effect

Shenfu bituminous coal (SFBC) and Xilinhaote lignite (XL) were subject to photo-catalytic oxidation with hydrogen peroxide over titanium dioxide. The reaction mixtures were extracted with acetone exhaustively. The extracts were analyzed with FTIR and GC/MS. The results show that coals be oxidized selectively and degraded partially. Compared with the bituminite coal, the oxidation effect of the lignite coal with active hydrogens is more obvious. The alkyl side chains of the macromolecules, particularly, chains of methyl, methylene and aromatic, are the most vulnerable in relation to other compounds in coals. Moreover, the increasing of straight-chain alkanes and the decreasing of condensed nucleus in SFBC and XL through oxidation suggest that the oxidation is an effective method of coal utilization with no difficultly, also be friendly towards the environment after treated as well as in the process of the treatment.

Removal of color substances using photocatalytic oxidation for membrane filtration processes

2001 ◽  
Vol 43 (10) ◽  
pp. 319-325 ◽  
Author(s):  
J. H. Tay ◽  
D. Chen ◽  
D. D. Sun
Keyword(s):  
Hydrogen Peroxide ◽  
Membrane Filtration ◽  
Photocatalytic Oxidation ◽  
Removal Rate ◽  
Membrane Surface ◽  
Rejection Rate ◽  
Solution Treated ◽  
Low Concentrations ◽  
Photo Catalytic Oxidation ◽  
Positive Effect

This study aims to remove the color substances, which normally cause difficulties in membrane filtration processes due to fouling using heterogeneous UV/TiO2/H2O2 reactor. It is confirmed that the technique used in this study was effective to remove TOC at 38% and color400 at 89% within 150-min irradiation. The experiment results showed that low concentrations of hydrogen peroxide dosage (less than 0.016 M) to UV/TiO2 system accelerated the TOC and Color400 removal rate from 9% to 38% and 40% to 89% respectively, while over-dosage made this positive effect decline. The humic acid solution treated by photo catalytic oxidation in UV/TiO2/H2O2 reactor did not change the zeta potential on membrane surface and membrane rejection rate.

Experimental Study on Titanium Based Photocatalyst and its Catalytic Oxidation on Flue Gas Mercury

2012 ◽  
Vol 252 ◽  
pp. 293-297
Author(s):  
Xue Shi ◽  
Xue Wei Dai ◽  
Jiang Wu ◽  
Xian Li ◽  
Yi Ran Zhang ◽  
...  
Keyword(s):  
Catalytic Oxidation ◽  
Removal Efficiency ◽  
Flue Gas ◽  
Photocatalytic Oxidation ◽  
Elemental Mercury ◽  
Mercury Removal ◽  
Mass Ratio ◽  
Photo Catalytic Oxidation ◽  
Iron Doped ◽  
Oxidation System

This paper mainly studied the effects of different iron-doped volume on photo-catalytic oxidation of TiO2 for mercury removal. Through the photocatalytic oxidation system, we evaluated the elemental mercury removal performance of TiO2 with iron-doped mass ratio of 0.5%, 1%, 2% and 3%. While the iron-doped mass ratio were 0.5%, 1%, 2% and 3%, the elemental mercury removal efficiency were 70.83%，52.89%，72.32% and 62.39% respectively, the removal efficiency increased firstly, then declined, and 2% iron-doped was the most appropriate

The Technical Study on Photo-Catalytic Oxidation Treatment of Low Concentration Methanol Wastewater in Gas Field

2013 ◽  
Vol 671-674 ◽  
pp. 2769-2772 ◽  
Author(s):  
Min Zhao ◽  
Ji Hui Jiang ◽  
Li Hui Zhou ◽  
Peng Kang Jin ◽  
Dong He
Keyword(s):  
Hydrogen Peroxide ◽  
Manganese Dioxide ◽  
Catalytic Oxidation ◽  
Gas Field ◽  
Oxidation Treatment ◽  
Low Concentration ◽  
Photo Catalytic Oxidation ◽  
Wastewater Quality ◽  
Technical Study

Though analysis and determination on wastewater quality of Gas Field, it can be seen that the main organic matter in wastewater is low concentration methanol. Aiming at the characteristics of higher degree of mineralization, methanol and lower pH ,the experiment is focusing on the effect of manganese dioxide & hydrogen peroxide catalytic oxidation process on methanol wastewater treatment properties and functions.The results show, for low concentration methanol wastewater,the manganese dioxide used has a diameter of 5nm with a dosage of 300mg/L, also a illumination intensity of 120Q, when the dosing ratio with hydrogen peroxide is 1:10, after 8h reaction period, the degradation rate of methanol were all above 70.0%.The methanol content after treated can meet the reference standard for Gas Field reinjection water

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

2019 ◽  
Vol 2019 ◽  
pp. 1-12
Author(s):  
Heng-Shen Xie ◽  
Zhi-Min Zong ◽  
Yu-Gao Wang ◽  
Pei-Zhi Zhao ◽  
Shi-Hua Zhang ◽  
...  
Keyword(s):  
Photocatalytic Oxidation ◽  
Bituminous Coal ◽  
Uv Light ◽  
Structural Characteristics ◽  
Gas Chromatograph ◽  
Hydrogen Atoms ◽  
Alkyl Radicals ◽  
Oxygen System ◽  
Branched Chain ◽  
Oxidation Effect

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.

Hydrogen peroxide enhanced photocatalytic oxidation of microcystin-LR using titanium dioxide

2000 ◽  
Vol 25 (1) ◽  
pp. 59-67 ◽  
Author(s):  
Benjamin J.P.A Cornish ◽  
Linda A Lawton ◽  
Peter K.J Robertson
Keyword(s):  
Hydrogen Peroxide ◽  
Titanium Dioxide ◽  
Photocatalytic Oxidation
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