Hollow TS-1 mesocrystals: hydrothermal construction and high catalytic performances in cyclohexanone ammoximation

RSC Advances ◽  
2015 ◽  
Vol 5 (64) ◽  
pp. 51563-51569 ◽  
Author(s):  
Yan Xue ◽  
Yiqiang Wen ◽  
Huijuan Wei ◽  
Meng Liu ◽  
Xiaoyan Huang ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Hydrothermal Treatment ◽  
Cyclohexanone Ammoximation ◽  
Catalytic Performances

Hollow TS-1 mesocrystals were obtained by the hydrothermal treatment. The hollow mesocrystalline structure significantly affects their catalytic activity in cyclohexanone ammoximation.

scholarly journals Seed-assisted synthesis of TS-1 crystals containing Al with high catalytic performances in cyclohexanone ammoximation

RSC Advances ◽  
2019 ◽  
Vol 9 (5) ◽  
pp. 2386-2394 ◽  
Author(s):  
Yan Xue ◽  
Guangling Zuo ◽  
Yiqiang Wen ◽  
Huijuan Wei ◽  
Meng Liu ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Acid Sites ◽  
Cyclohexanone Ammoximation ◽  
Catalytic Performances

Using aluminosilicate zeolites seeds, Al atoms are introduced into the TS-1 crystals, resulting in high Lbvalue and more acid sites, which improve the catalytic activity in cyclohexanone ammoximation.

Influence of hydrothermal treatment conditions on the structure and catalytic activity of alumina during the skeletal isomerization of n-butenes

2012 ◽  
Vol 4 (2) ◽  
pp. 141-149 ◽  
Author(s):  
A. A. Lamberov ◽  
E. Yu. Sitnikova ◽  
I. N. Mukhambetov ◽  
R. F. Zalyaliev ◽  
R. R. Gil’mullin ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Hydrothermal Treatment ◽  
Skeletal Isomerization ◽  
Treatment Conditions

Improved Ti species distribution and hierarchical pores in TS-1: towards regeneration of TS-1 deactivated due to alkali corrosion

2020 ◽  
Vol 44 (16) ◽  
pp. 6394-6401
Author(s):  
Mingming Zhang ◽  
Yiqiang Wen ◽  
Lukuan Zong ◽  
Huijuan Wei ◽  
Xiangyu Wang
Keyword(s):  
Hydrothermal Treatment ◽  
Species Distribution ◽  
Hierarchical Pores ◽  
Cyclohexanone Ammoximation

TS-1 deactivated in industrial cyclohexanone ammoximation can be effectively regenerated by hydrothermal treatment with TPABr and ethanolamine solution.

scholarly journals Evaluation of a Catalyst Durability in Absence and Presence of Toluene Impurity: Case of the Material Co2Ni2Mg2Al2 Mixed Oxide Prepared by Hydrotalcite Route in Methane Dry Reforming to Produce Energy

Materials ◽  
2019 ◽  
Vol 12 (9) ◽  
pp. 1362
Author(s):  
Carole Tanios ◽  
Cédric Gennequin ◽  
Madona Labaki ◽  
Haingomalala Lucette Tidahy ◽  
Antoine Aboukaïs ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Mixed Oxide ◽  
Active Sites ◽  
Dry Reforming ◽  
Dry Reforming Of Methane ◽  
Side Reactions ◽  
Commercial Catalyst ◽  
Catalytic Sites ◽  
Catalyst Durability ◽  
Catalytic Performances

Ni, Co, Mg, and Al mixed-oxide solids, synthesized via the hydrotalcite route, were investigated in previous works toward the dry reforming of methane for hydrogen production. The oxide Co2Ni2Mg2Al2 calcined at 800 °C, Co2Ni2Mg2Al2800, showed the highest catalytic activity in the studied series, which was ascribable to an interaction between Ni and Co, which is optimal for this Co/Ni ratio. In the present study, Co2Ni2Mg2Al2800 was compared to a commercial catalyst widely used in the industry, Ni(50%)/Al2O3, and showed better activity despite its lower number of active sites, as well as lower amounts of carbon on its surface, i.e. less deactivation. In addition to this, Co2Ni2Mg2Al2800 showed stability for 20 h under stream during the dry reforming of methane. This good durability is attributed to a periodic cycle of carbon deposition and removal as well as to the strong interaction between Ni and Co, preventing the deactivation of the catalyst. The evaluation of the catalytic performances in the presence of toluene, which is an impurity that exists in biogas, is also a part of this work. In the presence of toluene, the catalytic activity of Co2Ni2Mg2Al2800 decreases, and higher carbon formation on the catalyst surface is detected. Toluene adsorption on catalytic sites, side reactions performed by toluene, and the competition between toluene and methane in the reaction with carbon dioxide are the main reasons for such results.

Morphology-dependent catalytic activity of plasmonic MoO3−x for hydrolytic dehydrogenation of ammonia borane

2017 ◽  
Vol 10 (06) ◽  
pp. 1750079 ◽  
Author(s):  
Jie Gong ◽  
Zhixue Li ◽  
Ting Zhang ◽  
Runze Chen ◽  
Xiaoying Zheng ◽  
...  
Keyword(s):  
Acetic Acid ◽  
Catalytic Activity ◽  
Solvothermal Method ◽  
Visible Region ◽  
Volume Ratio ◽  
Ammonia Borane ◽  
Distilled Water ◽  
Facile Solvothermal Method ◽  
Solvent Volume ◽  
Catalytic Performances

Series of plasmonic MoO[Formula: see text] particles have been prepared by a facile solvothermal method to produce hydrogen via hydrolytic dehydrogenation of ammonia borane. Interestingly, the as-prepared MoO[Formula: see text] particles present various morphologies, i.e. flower, schistose and nanorod by simply tuning the reaction temperature and solvent volume ratio of distilled water and acetic acid. More importantly, these MoO[Formula: see text] particles with different morphologies exhibit various catalytic performances of NH3BH3 under the irradiation of visible light. Particularly, the flower-like MoO[Formula: see text] microstructure possesses the best catalytic activity for hydrogen production probably owing to the relatively large surface area and strong LSPR in the visible region.

Pd/Ag and Pd/Au bimetallic nanocatalysts on mesoporous silica for plasmon-mediated enhanced catalytic activity under visible light irradiation

2016 ◽  
Vol 4 (26) ◽  
pp. 10142-10150 ◽  
Author(s):  
Priyanka Verma ◽  
Yasutaka Kuwahara ◽  
Kohsuke Mori ◽  
Hiromi Yamashita
Keyword(s):  
Catalytic Activity ◽  
Mesoporous Silica ◽  
Visible Light ◽  
Visible Light Irradiation ◽  
Light Irradiation ◽  
Systematic Comparison ◽  
Bimetallic Nanostructures ◽  
Bimetallic Nanocatalysts ◽  
Catalytic Performances

A systematic comparison of plasmonic properties and catalytic performances has been performed with Pd deposited bimetallic nanostructures of plasmonic Ag and Au.

The Influence of Preparation Procedures on Hydrogenation CO2 to Formic Acid over Supported Ru Catalysts

2014 ◽  
Vol 881-883 ◽  
pp. 283-286 ◽  
Author(s):  
Na Liu ◽  
Jie Lei ◽  
Meng Yao Li ◽  
Peng Wang
Keyword(s):  
Catalytic Activity ◽  
Formic Acid ◽  
Ruthenium Oxide ◽  
Nitrogen Adsorption ◽  
Preparation Procedure ◽  
Ru Catalysts ◽  
Optimal Activity ◽  
Adsorption Measurement ◽  
Hydrogenation Of Co ◽  
Catalytic Performances

A series of catalysts made of ruthenium loaded on γ-Al2O3 nanorods were prepared to study the effects of preparation procedure on their catalytic performances for hydrogenation CO2 to formic acid. The catalysts are characterized by XRD, nitrogen adsorption measurement and H2-TPR in detail. The results reveal that the catalytic activity is determined by the structure of supported ruthenium oxide species. The dispersion of RuOx is influenced by the preparation procedures. Optimal activity of catalyst for the hydrogenation of CO2 to formic acid is achieved over a γ-Al2O3 nanorods supported 2.0 wt% ruthenium catalyst, which is prepared by calcinations at 573 K in flowing air for 6h.

Effect of cerous phosphates with different crystal structures on their acidity and catalytic activity for the dehydration of glucose into 5-(hydroxymethyl)furfural

RSC Advances ◽  
2016 ◽  
Vol 6 (46) ◽  
pp. 40175-40184 ◽  
Author(s):  
Lina Wang ◽  
Fulong Yuan ◽  
Xiaoyu Niu ◽  
Chuanhong Kang ◽  
Pengying Li ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Crystal Structures ◽  
Hydroxymethyl Furfural ◽  
Catalytic Performances

Cerous phosphate catalysts with different crystal structures show different catalytic performances for the dehydration of glucose into 5-(hydroxymethyl)furfural due to their surface Ce4+ amounts and acidities.

An Innovative Synthesis of Spinel-Structured and Ferromagnetic Behaviour of Fe3O4 Nanoparticles Antibacterial and Catalytic Activity Evaluated in the Selective Oxidation

2020 ◽  
Vol 18 (3) ◽  
pp. 236-240
Author(s):  
S. Ambika ◽  
K. Saravanan
Keyword(s):  
Antimicrobial Activity ◽  
Catalytic Activity ◽  
Selective Oxidation ◽  
Fe3o4 Nanoparticles ◽  
Ferromagnetic Behaviour ◽  
Combustion Route ◽  
First Time ◽  
Catalytic Performances

Nanocrystalline Fe3O4 powder was produced via the organic combustion route using L-arginine for the first time as fuel. The prepared yields is considered through several investigates, such as, DRS, PL, XRD, SEM, TEM, EDS, and VSM. The current study existence limited only toward the antimicrobial activity that the limit Fe3O4. The influences for catalytic performances were explained in factor, while the samples characterization was presented.

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