scholarly journals Selective Oxidation of Methane over Fe-Zeolites by In Situ Generated H2O2

Catalysts ◽  
2020 ◽  
Vol 10 (3) ◽  
pp. 299 ◽  
Author(s):  
Jongkyu Kang ◽  
Eun Duck Park
Keyword(s):  
Activated Carbon ◽  
Liquid Phase ◽  
Ion Exchange ◽  
Formic Acid ◽  
Selective Oxidation ◽  
Molecular Hydrogen ◽  
Reaction Conditions ◽  
Oxidation Of Methane ◽  
The Given

Liquid-phase selective oxidation of methane into methane oxygenates, including methanol and formic acid, with molecular oxygen was investigated using Fe-zeolites and Pd/activated carbon in the presence of molecular hydrogen as a reducing agent. Various Fe-zeolites such as Fe-ZSM-5, Fe-mordenite, Fe-β, Fe-Y, and Fe-ferrierite were prepared by ion-exchange and compared for this reaction. Among them, Fe-ZSM-5 was selected for further study because this catalyst showed high activity in the selective oxidation of methane with relatively less leaching. Further, the effect of reaction temperature, pH, and the amount of catalyst was examined, and detailed investigations revealed that the leached Fe species, which were facilitated in the presence of acid, were mainly responsible for methane oxidation under the given reaction conditions.

scholarly journals Mechanistic insights into the selective oxidation of 5-(hydroxymethyl)furfural over silver-based catalysts

2020 ◽  
Vol 10 (15) ◽  
pp. 5036-5047 ◽  
Author(s):  
Oliver R. Schade ◽  
Abhijeet Gaur ◽  
Anna Zimina ◽  
Erisa Saraçi ◽  
Jan-Dierk Grunwaldt
Keyword(s):  
Selective Oxidation ◽  
Absorption Spectroscopy ◽  
Reaction Conditions ◽  
X Ray ◽  
Hydroxymethyl Furfural ◽  
X Ray Absorption ◽  
Catalyzed Oxidation

Silver-catalyzed oxidation of 5-(hydroxymethyl)furfural (HMF) to 5-hydroxymethyl-2-furancarboxylic acid (HFCA) was investigated using in situ X-ray absorption spectroscopy under reaction conditions over Ag/ZrO2 and Ag/TiO2 catalysts.

Direct aerobic liquid phase epoxidation of propylene catalyzed by Mn(iii) porphyrin under mild conditions: evidence for the existence of both peroxide and Mn(iv)-oxo species from in situ characterizations

RSC Advances ◽  
2015 ◽  
Vol 5 (38) ◽  
pp. 30014-30020 ◽  
Author(s):  
Yang Li ◽  
Xiantai Zhou ◽  
Shaoyun Chen ◽  
Rongchang Luo ◽  
Jun Jiang ◽  
...  
Keyword(s):  
Liquid Phase ◽  
Selective Oxidation ◽  
Epoxidation Of Propylene ◽  
Mild Conditions ◽  
Excellent Activity ◽  
Liquid Phase Epoxidation

Manganese(iii) porphyrin exhibited excellent activity for the selective oxidation of propylene. Experimental evidences that the generation of peroxide and Mn(iv) oxo species, which was well confirmed by in situ IR, in situ UV and MS.

scholarly journals Tracking the structural arrangement of ions in carbon supercapacitor nanopores using in situ small-angle X-ray scattering

2015 ◽  
Vol 8 (6) ◽  
pp. 1725-1735 ◽  
Author(s):  
C. Prehal ◽  
D. Weingarth ◽  
E. Perre ◽  
R. T. Lechner ◽  
H. Amenitsch ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Ion Exchange ◽  
Small Angle ◽  
X Ray ◽  
Structural Arrangement ◽  
X Ray Scattering ◽  
Carbon Supercapacitors ◽  
Ray Scattering

In situ small-angle X-ray scattering gives new insights into global ion exchange as well as into local re-arrangement of ions across the nanopores of activated carbon supercapacitors.

Unravelling the radical transition during the carbon-catalyzed oxidation of cyclohexane by in situ electron paramagnetic resonance in the liquid phase

2017 ◽  
Vol 7 (19) ◽  
pp. 4431-4436 ◽  
Author(s):  
Xixian Yang ◽  
Yonghai Cao ◽  
Hao Yu ◽  
Hongyu Huang ◽  
Hongjuan Wang ◽  
...  
Keyword(s):  
Electron Paramagnetic Resonance ◽  
Liquid Phase ◽  
Selective Oxidation ◽  
Chemical Industry ◽  
Paramagnetic Resonance ◽  
Oxidation Of Hydrocarbons ◽  
Electron Paramagnetic ◽  
Catalyzed Oxidation

The selective oxidation of hydrocarbons is of great importance in the chemical industry.

Removal of mercury from flue gases over iron modified activated carbon made by in situ ion exchange method

2020 ◽  
Vol 93 (4) ◽  
pp. 1411-1418 ◽  
Author(s):  
Zhongxi Han ◽  
Yanxia Guo ◽  
Wei Yang ◽  
Rui Tang ◽  
Hui Wang ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Ion Exchange ◽  
Flue Gases ◽  
Exchange Method ◽  
Modified Activated Carbon ◽  
Ion Exchange Method

Liquid phase oxidation of glycerol in batch and flow-type reactors with oxygen over Au–Pd nanoparticles stabilized in anion-exchange resin

RSC Advances ◽  
2014 ◽  
Vol 4 (63) ◽  
pp. 33416-33423 ◽  
Author(s):  
Naoki Mimura ◽  
Norihito Hiyoshi ◽  
Tadahiro Fujitani ◽  
Franck Dumeignil
Keyword(s):  
Liquid Phase ◽  
Ion Exchange ◽  
Anion Exchange ◽  
Selective Oxidation ◽  
Exchange Resin ◽  
Bimetallic Nanoparticles ◽  
Anion Exchange Resin ◽  
Pd Nanoparticles ◽  
Ion Exchange Resin ◽  
Phase Oxidation

Au–Pd bimetallic nanoparticles for selective oxidation of glycerol were successfully prepared in a commercial ion-exchange resin.

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