scholarly journals In situ high-pressure 13C/1H NMR reaction studies of benzyl alcohol oxidation over a Pd/Al2O3 catalyst

2020 ◽  
Vol 5 (6) ◽  
pp. 1053-1057
Author(s):  
Carmine D'Agostino ◽  
Mick D. Mantle ◽  
Lynn F. Gladden
Keyword(s):  
High Pressure ◽  
Benzyl Alcohol ◽  
1H Nmr ◽  
Heterogeneous Catalysts ◽  
Kinetic Studies ◽  
Alcohol Oxidation ◽  
Catalytic Oxidations ◽  
Al2o3 Catalyst ◽  
C Nmr

We report in situ high-pressure NMR kinetic studies of catalytic oxidations inside heterogeneous catalysts exploiting distortionless enhancement by polarisation transfer (DEPT) 13C NMR.

Kinetics of high-pressure mineral phase transformations using in situ time-resolved X-ray diffraction in the Paris-Edinburgh cell: a practical guide for data acquisition and treatment

2008 ◽  
Vol 72 (2) ◽  
pp. 683-695 ◽  
Author(s):  
J. P. Perrillat
Keyword(s):  
High Pressure ◽  
Phase Transformations ◽  
Kinetic Studies ◽  
X Ray Diffraction ◽  
Time Resolved ◽  
X Ray ◽  
Practical Guide ◽  
Set Up ◽  
Isothermal Kinetic

AbstractSynchrotron X-ray diffraction (XRD) is a powerful technique to study in situ and in real-time the structural and kinetic processes of pressure-induced phase transformations. This paper presents the experimental set-up developed at beamline ID27 of the ESRF to perform time-resolved angle dispersive XRD in the Paris-Edinburgh cell. It provides a practical guide for the acquisition of isobaric-isothermal kinetic data and the construction of transformation-time plots. The interpretation of experimental data in terms of reaction mechanisms and transformation rates is supported by an overview of the kinetic theory of solid-solid transformations, with each step of data processing illustrated by experimental results of relevance to the geosciences. Reaction kinetics may be affected by several factors such as the sample microstructure, impurities or differential stress. Further high-pressure kinetic studies should investigate the influence of such processes, in order to acquire kinetic information more akin to natural or technological processes.

In Situ PM-IRRAS Study of Liquid-Phase Benzyl Alcohol Oxidation on Palladium

2009 ◽  
Vol 113 (52) ◽  
pp. 21849-21855 ◽  
Author(s):  
Daniel M. Meier ◽  
Atsushi Urakawa ◽  
Alfons Baiker
Keyword(s):  
Liquid Phase ◽  
Benzyl Alcohol ◽  
Alcohol Oxidation ◽  
Benzyl Alcohol Oxidation

scholarly journals Modifications in the Composition of CuO/ZnO/Al2O3 Catalyst for the Synthesis of Methanol by CO2 Hydrogenation

Catalysts ◽  
2021 ◽  
Vol 11 (7) ◽  
pp. 774
Author(s):  
Bianca Trifan ◽  
Javier Lasobras ◽  
Jaime Soler ◽  
Javier Herguido ◽  
Miguel Menéndez
Keyword(s):  
High Pressure ◽  
Heterogeneous Catalysts ◽  
High Selectivity ◽  
Co2 Hydrogenation ◽  
Efficient Catalyst ◽  
Synthesis Time ◽  
Mild Conditions ◽  
Temperature And Pressure ◽  
Synthesis Of Methanol ◽  
Al2o3 Catalyst

Renewable methanol, obtained from CO2 and hydrogen provided from renewable energy, was proposed to close the CO2 loop. In industry, methanol synthesis using the catalyst CuO/ZnO/Al2O3 occurs at a high pressure. We intend to make certain modification on the traditional catalyst to work at lower pressure, maintaining high selectivity. Therefore, three heterogeneous catalysts were synthesized by coprecipitation to improve the activity and the selectivity to methanol under mild conditions of temperature and pressure. Certain modifications on the traditional catalyst Cu/Zn/Al2O3 were employed such as the modification of the synthesis time and the addition of Pd as a dopant agent. The most efficient catalyst among those tested was a palladium-doped catalyst, 5% Pd/Cu/Zn/Al2O3. This had a selectivity of 64% at 210 °C and 5 bar.

scholarly journals Comparison of homogeneous and heterogeneous catalysts in dye-sensitized photoelectrochemical cells for alcohol oxidation coupled to dihydrogen formation

2021 ◽  
Author(s):  
Didjay Bruggeman ◽  
Simon Mathew ◽  
Remko Detz ◽  
Joost N. H. Reek
Keyword(s):  
Benzyl Alcohol ◽  
Heterogeneous Catalysts ◽  
Alcohol Oxidation ◽  
Photoelectrochemical Cells ◽  
Dye Sensitized ◽  
Oxidation Of Benzyl Alcohol

In this study we examine two different strategies—a homo- and heterogeneous approach—of the light-driven oxidation of benzyl alcohol in dye-sensitized photoelectrochemical cells (DSPECs). The DSPEC consists of a mesoporous anatase...

General surface grafting strategy-derived carbon-modified graphitic carbon nitride with largely enhanced visible light photocatalytic H2 evolution coupled with benzyl alcohol oxidation

2021 ◽  
Vol 9 (11) ◽  
pp. 7143-7149
Author(s):  
Haifei Wang ◽  
Jihua Zhang ◽  
Xu Jin ◽  
Xiaoqi Wang ◽  
Fu Zhang ◽  
...  
Keyword(s):  
Visible Light ◽  
Benzyl Alcohol ◽  
Carbon Nitride ◽  
Alcohol Oxidation ◽  
Surface Grafting ◽  
H2 Evolution ◽  
Benzyl Alcohol Oxidation ◽  
General Surface ◽  
Visible Light Photocatalytic

A general surface grafting strategy followed by in situ carbonization was developed to prepare the carbon-modified g-C3N4 with robustly enhanced visible light photocatalytic activity for H2 evolution coupled with benzyl alcohol oxidation.

Single Crystal Growth of High-Pressure Phases of Ice and Salt Hydrate Far Below the Original Melting Point by Mixing Alcohol: Crystal Structure Determination of Magnesium Chloride Heptahydrate

2020 ◽  
Author(s):  
Keishiro Yamashita ◽  
Kazuki Komatsu ◽  
Hiroyuki Kagi
Keyword(s):  
Crystal Structure ◽  
High Pressure ◽  
Crystal Growth ◽  
Single Crystal ◽  
Room Temperature ◽  
Growth Technique ◽  
Salt Hydrate ◽  
X Ray

An crystal-growth technique for single crystal x-ray structure analysis of high-pressure forms of hydrogen-bonded crystals is proposed. We used alcohol mixture (methanol: ethanol = 4:1 in volumetric ratio), which is a widely used pressure transmitting medium, inhibiting the nucleation and growth of unwanted crystals. In this paper, two kinds of single crystals which have not been obtained using a conventional experimental technique were obtained using this technique: ice VI at 1.99 GPa and MgCl<sub>2</sub>·7H<sub>2</sub>O at 2.50 GPa at room temperature. Here we first report the crystal structure of MgCl2·7H2O. This technique simultaneously meets the requirement of hydrostaticity for high-pressure experiments and has feasibility for further in-situ measurements.

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