scholarly journals Optimization of a heterogeneous Pd–Cu/zeolite Y Wacker catalyst for ethylene oxidation

2020 ◽  
Vol 56 (9) ◽  
pp. 1377-1380 ◽  
Author(s):  
Jerick Imbao ◽  
Jeroen A. van Bokhoven ◽  
Maarten Nachtegaal
Keyword(s):  
Heterogeneous Catalyst ◽  
Zeolite Y ◽  
Ethylene Oxidation ◽  
Wacker Oxidation

A heterogeneous catalyst based on palladium- and copper-exchanged zeolite Y is optimized for stable Wacker oxidation.

scholarly journals Elucidating the mechanism of heterogeneous Wacker oxidation over Pd-Cu/zeolite Y by transient XAS

2020 ◽  
Vol 11 (1) ◽  
Author(s):  
Jerick Imbao ◽  
Jeroen A. van Bokhoven ◽  
Adam Clark ◽  
Maarten Nachtegaal
Keyword(s):  
Zeolite Y ◽  
Wacker Oxidation

Zeolite Y nanoparticle assemblies with high activity in the direct hydration of terminal alkynes

RSC Advances ◽  
2016 ◽  
Vol 6 (74) ◽  
pp. 69822-69827 ◽  
Author(s):  
Shuling Xu ◽  
Zhi Yun ◽  
Yu Feng ◽  
Ting Tang ◽  
Zhongxue Fang ◽  
...  
Keyword(s):  
High Activity ◽  
Heterogeneous Catalyst ◽  
Zeolite Y ◽  
Nanoparticle Assembly ◽  
Terminal Alkynes ◽  
Macroporous Structure ◽  
Nanoparticle Assemblies ◽  
Highly Efficient ◽  
Efficient Heterogeneous Catalyst

A strong acidic zeolite Y nanoparticle assembly (HNANO-Y) with a micro–meso–macroporous structure was synthesized and used as a highly efficient heterogeneous catalyst for the hydration of alkynes to prepare ketone compounds.

On the Promotional and Inhibitory Effects of Water on Wacker-Type Ethylene Oxidation Over Pd–Cu/Zeolite Y

ACS Catalysis ◽  
2021 ◽  
pp. 8684-8691
Author(s):  
Jerick Imbao ◽  
Jeroen A. van Bokhoven ◽  
Maarten Nachtegaal
Keyword(s):  
Zeolite Y ◽  
Ethylene Oxidation ◽  
Inhibitory Effects

Michael Addition of 1,3-Dicarbonyl Derivatives in the Presence of Zeolite Y as an Heterogeneous Catalyst

2019 ◽  
Vol 30 (7) ◽  
pp. 2323-2334 ◽  
Author(s):  
Amel Mekki ◽  
Aouicha Benmaati ◽  
Adel Mokhtar ◽  
Mohammed Hachemaoui ◽  
Farouk Zaoui ◽  
...  
Keyword(s):  
Heterogeneous Catalyst ◽  
Michael Addition ◽  
Zeolite Y

Chiral modification of copper exchanged zeolite-Y with cinchonidine and its application in the asymmetric Henry reaction

2015 ◽  
Vol 44 (48) ◽  
pp. 20949-20963 ◽  
Author(s):  
Jogesh Deka ◽  
L. Satyanarayana ◽  
G. V. Karunakar ◽  
Pradip Kr. Bhattacharyya ◽  
Kusum K. Bania
Keyword(s):  
Heterogeneous Catalyst ◽  
Zeolite Y ◽  
Henry Reaction ◽  
Chiral Modification

(−)-Cinchonidine is being encapsulated inside copper exchanged zeolite-Y and used as heterogeneous catalyst for the asymmetric Henry reaction.

Surface roughness measurements of vanadium-contaminated fluidized cracking catalysts by atomic force microscopy

1996 ◽  
Vol 54 ◽  
pp. 866-867
Author(s):  
H. Kinney ◽  
M.L. Occelli ◽  
S.A.C. Gould
Keyword(s):  
Surface Roughness ◽  
Zeolite Y ◽  
Atomic Level ◽  
Microporous Structure ◽  
Contact Mode ◽  
Force Microscopy ◽  
Atomic Force ◽  
Before And After ◽  
Roughness Measurements ◽  
Cracking Catalysts

For this study we have used a contact mode atomic force microscope (AFM) to study to topography of fluidized cracking catalysts (FCC), before and after contamination with 5% vanadium. We selected the AFM because of its ability to well characterize the surface roughness of materials down to the atomic level. It is believed that the cracking in the FCCs occurs mainly on the catalysts top 10-15 μm suggesting that the surface corrugation could play a key role in the FCCs microactivity properties. To test this hypothesis, we chose vanadium as a contaminate because this metal is capable of irreversibly destroying the FCC crystallinity as well as it microporous structure. In addition, we wanted to examine the extent to which steaming affects the vanadium contaminated FCC. Using the AFM, we measured the surface roughness of FCCs, before and after contamination and after steaming.We obtained our FCC (GRZ-1) from Davison. The FCC is generated so that it contains and estimated 35% rare earth exchaged zeolite Y, 50% kaolin and 15% binder.

Synthesis of carbonate esters by carboxymethylation using NaAlO2 as a highly active heterogeneous catalyst

2018 ◽  
Author(s):  
Sreerangappa Ramesh ◽  
Kiran Indukuri ◽  
Olivier Riant ◽  
Damien Debecker
Keyword(s):  
Heterogeneous Catalyst ◽  
Dimethyl Carbonate ◽  
Sodium Aluminate ◽  
High Yield ◽  
Solid Catalyst ◽  
Highly Active ◽  
Aromatic Alcohols ◽  
Green Conditions ◽  
Mixed Carbonate

<p>Sodium aluminate is presented as a highly active heterogeneous catalyst able to convert a range of alcohols into the corresponding mixed carbonate esters, in high yield and under green conditions. The reaction is carried out using dimethyl carbonate both as a reactant and solvent, at 90°C. Allylic, aliphatic and aromatic alcohols are converted in good yields. The solid catalyst is shown to be truly heterogeneous, resistant to leaching, and recyclable. </p>

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