Evolution of iron species for promoting the catalytic performance of FeZSM-5 in phenol oxidation

RSC Advances ◽  
2016 ◽  
Vol 6 (39) ◽  
pp. 32789-32797 ◽  
Author(s):  
Lei Luo ◽  
Chengyi Dai ◽  
Anfeng Zhang ◽  
Junhu Wang ◽  
Chunshan Song ◽  
...  
Keyword(s):  
Catalytic Performance ◽  
Phenol Oxidation ◽  
Iron Species ◽  
Species Evolution

Facile modification of FeZSM-5 utilizing an organic directing agent (ODA) for iron species evolution toward better Fenton activity was developed.

scholarly journals Treatment of phenol by catalytic wet air oxidation: a comparative study of copper and nickel supported on γ-alumina, ceria and γ-alumina–ceria

RSC Advances ◽  
2019 ◽  
Vol 9 (15) ◽  
pp. 8463-8479 ◽  
Author(s):  
Zenaida Guerra-Que ◽  
Hermicenda Pérez-Vidal ◽  
G. Torres-Torres ◽  
Juan Carlos Arévalo-Pérez ◽  
Adib Abiu Silahua Pavón ◽  
...  
Keyword(s):  
Comparative Study ◽  
Treatment Effects ◽  
Catalytic Performance ◽  
Phenol Oxidation ◽  
Catalytic Wet Air Oxidation ◽  
Air Oxidation ◽  
Wet Air Oxidation ◽  
Reduction Treatment

Influence of the calcination and reduction treatment effects used to activate catalysts on the global catalytic performance on phenol oxidation over different supports.

Intensified-Fenton process for the treatment of phenol aqueous solutions

2014 ◽  
Vol 71 (3) ◽  
pp. 359-365 ◽  
Author(s):  
M. Isabel Pariente ◽  
Raúl Molina ◽  
Juan Antonio Melero ◽  
Juan Ángel Botas ◽  
Fernando Martínez
Keyword(s):  
Hydrogen Peroxide ◽  
Aqueous Solutions ◽  
Heterogeneous Catalyst ◽  
Reaction Temperature ◽  
Catalytic Performance ◽  
Fenton Process ◽  
Iron Species ◽  
Iron Extraction ◽  
Dissolved Iron ◽  
Iron Leaching

An intensified-Fenton process for the treatment of phenol aqueous solutions has been studied as a continuous catalytic wet hydrogen peroxide oxidation system. This process consists of coupling the catalytic activity of a heterogeneous Fenton-like catalyst with the homogeneous contribution of its dissolved iron species. Agglomerated mesoporous SBA-15 silica-supported iron oxide (Fe2O3/SBA-15) material was used as heterogeneous catalyst. The influence of the reaction temperature and the initial hydrogen peroxide dosages was studied in order to minimize the operation cost of the process. The catalytic performance of the process was assessed in terms of total organic carbon (TOC) and hydrogen peroxide conversions. Likewise, the stability of the solid Fenton-like catalyst was also evaluated in terms of the dissolved iron species. The increase of the reaction temperature enhanced the TOC conversion and reduced the iron leaching from the heterogeneous catalyst. These results were related to the degradation of oxalic acid as responsible for iron extraction by formation of soluble stable iron complexes into the aqueous medium. Finally, the use of a moderate hydrogen peroxide concentration (2.6 g/L) and milder temperatures (80–120 °C) has led to remarkable results of TOC and phenol reductions as well as oxidant efficiency through the intensified-Fenton process.

Effect of ZSM-11 crystallinity on its catalytic performance in benzene to phenol oxidation with nitrous oxide

1996 ◽  
Vol 58 (1) ◽  
pp. 105-110 ◽  
Author(s):  
L. V. Pirutko ◽  
K. A. Dubkov ◽  
L. P. Solovyeva ◽  
G. I. Panov
Keyword(s):  
Nitrous Oxide ◽  
Catalytic Performance ◽  
Phenol Oxidation

Ti-YNU-2: A Microporous Titanosilicate with Enhanced Catalytic Performance for Phenol Oxidation

ACS Catalysis ◽  
2014 ◽  
Vol 4 (8) ◽  
pp. 2653-2657 ◽  
Author(s):  
Makiko Sasaki ◽  
Yuya Sato ◽  
Yasuyuki Tsuboi ◽  
Satoshi Inagaki ◽  
Yoshihiro Kubota
Keyword(s):  
Catalytic Performance ◽  
Phenol Oxidation ◽  
Microporous Titanosilicate

scholarly journals Synthesis, characterisation and catalytic performance of Cu- and Co-modified Fe-Al co-precipitated catalysts for the steam reforming of ethanol

2014 ◽  
Vol 16 (6) ◽  
pp. 1111-1120
Keyword(s):  
Specific Surface ◽  
Steam Reforming ◽  
Catalytic Performance ◽  
Precipitation Method ◽  
Partial Substitution ◽  
Iron Species ◽  
Surface Areas ◽  
Steam Reforming Of Ethanol ◽  
And Performance ◽  
And Shifts

<p>This paper reports the synthesis and the investigation of the properties and performance of Fe-Al catalysts modified with Cu or Co for the steam reforming of ethanol. The materials were prepared by the precipitation method with different Fe/Al ratios. The samples were characterised by the S<sub>BET</sub>, TG/DTG, XRD, H<sub>2</sub>-TPR and TPO/DTA analyses. The increase in the Fe/Al ratio leads to a decrease in the specific surface area and shifts the reduction peaks towards higher temperatures. The partial substitution of Fe by Co or Cu modifies the structure of the materials because higher specific surface areas and crystallites of iron oxides with smaller sizes are formed. The promotion also improves the reducibility of the iron species. These changes provide higher activity and selectivity towards H<sub>2</sub> and CO for the modified samples and for the samples with lower Fe/Al ratio. The Co-containing catalyst showed the best performance because this sample exhibited the highest conversions and selectivity towards both H<sub>2</sub> and CO and the lowest formation of coke according to the TPO analysis.</p>

Liquid-phase oxidation of alkanes with molecular oxygen catalyzed by high valent iron-based perovskite

2018 ◽  
Vol 54 (50) ◽  
pp. 6772-6775 ◽  
Author(s):  
Satomi Shibata ◽  
Kosei Sugahara ◽  
Keigo Kamata ◽  
Michikazu Hara
Keyword(s):  
Liquid Phase ◽  
Molecular Oxygen ◽  
Aerobic Oxidation ◽  
Catalytic Performance ◽  
Liquid Phase Oxidation ◽  
Iron Species ◽  
Perovskite Catalyst ◽  
Phase Oxidation ◽  
Iron Based ◽  
High Valent

A hexagonal BaFeO3−δ perovskite catalyst containing high valent iron species exhibits high catalytic performance for the aerobic oxidation of alkanes without the need for additives.

scholarly journals Determination of Molybdenum Species Evolution during Non‐Oxidative Dehydroaromatization of Methane and its Implications for Catalytic Performance

ChemCatChem ◽  
2018 ◽  
Vol 11 (1) ◽  
pp. 473-480 ◽  
Author(s):  
Miren Agote‐Arán ◽  
Anna B. Kroner ◽  
Husn U. Islam ◽  
Wojciech A. Sławiński ◽  
David S. Wragg ◽  
...  
Keyword(s):  
Catalytic Performance ◽  
Species Evolution

Mechanism of FeZSM-5 milling and its effect on the catalytic performance in benzene to phenol oxidation

Zeolites ◽  
1995 ◽  
Vol 15 (3) ◽  
pp. 253-258 ◽  
Author(s):  
A.S. Kharitonov ◽  
V.B. Fenelonov ◽  
T.P. Voskresenskaya ◽  
N.A. Rudina ◽  
V.V. Molchanov ◽  
...  
Keyword(s):  
Catalytic Performance ◽  
Phenol Oxidation

Crystal plane dependent dopant migration that boosts catalytic oxidation

2018 ◽  
Vol 8 (23) ◽  
pp. 6084-6090 ◽  
Author(s):  
Ruixue Wang ◽  
Jingjing Wei ◽  
Huiying Wei ◽  
Yanzhao Yang
Keyword(s):  
Catalytic Oxidation ◽  
Catalytic Performance ◽  
Crystal Plane ◽  
Catalyst Supports ◽  
Iron Species ◽  
Crystallographic Facets

CeO2 rods with {110} facets and cubes with {100} facets were utilized as catalyst supports to probe the effect of crystallographic facets on the iron species and the structure-dependent catalytic performance.

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