scholarly journals Cerium oxide as a catalyst for the ketonization of aldehydes: mechanistic insights and a convenient way to alkanes without the consumption of external hydrogen

2017 ◽  
Vol 19 (6) ◽  
pp. 1555-1569 ◽  
Author(s):  
Lina M. Orozco ◽  
Michael Renz ◽  
Avelino Corma
Keyword(s):  
Carbon Dioxide ◽  
Cerium Oxide ◽  
Carbon Dioxide Molecule ◽  
Efficient Transformation

The atom-efficient transformation of two aldehyde molecules into a linear alkane at the expense of one carbon dioxide molecule.

The carbon dioxide molecule

1986 ◽  
Vol 58 (3) ◽  
pp. 627-636 ◽  
Author(s):  
G. Graner ◽  
C. Rossetti ◽  
D. Bailly
Keyword(s):  
Carbon Dioxide ◽  
Carbon Dioxide Molecule

Improved mesostructured oxygen electrodes for highly performing solid oxide cells for co-electrolysis of steam and carbon dioxide

2019 ◽  
Vol 7 (48) ◽  
pp. 27458-27468
Author(s):  
S. Anelli ◽  
F. Baiutti ◽  
A. Hornés ◽  
L. Bernadet ◽  
M. Torrell ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Cerium Oxide ◽  
Solid Oxide ◽  
Next Generation ◽  
Hard Template ◽  
Synthesis Route ◽  
Oxygen Electrodes

Next-generation mesoporous cerium oxide scaffolds are synthesized for the fabrication of highly performing solid oxide cells by introducing a hard-template nanocasting synthesis route which comprises chemical post-treatments.

The quadrupole moment of the carbon dioxide molecule

1963 ◽  
Vol 273 (1353) ◽  
pp. 275-289 ◽  
Keyword(s):  
Carbon Dioxide ◽  
Carbon Atom ◽  
Quadrupole Moment ◽  
Polarizability Tensor ◽  
Sulphur Hexafluoride ◽  
Inhomogeneous Electric Field ◽  
Carbon Dioxide Molecule ◽  
Method Of Measurement ◽  
The Difference

A direct measurement of the magnitude and sign of the quadrupole moment of the carbon dioxide molecule has been made by determining the birefringence induced in gaseous C0 2 by an inhomogeneous electric field. The method of measurement and the experimental details are described. The observable is the product of the molecular quadrupole moment 0 and the difference between parallel and perpendicular components of the optical polarizability tensor. F o r CO 2 , this quantity was found to have the value — (9.1±0.5)x 10 -50 e.s.u. can be determined by other methods, but unfortunately the present uncertainty in this quantity is greater than that of the product. The most satisfactory value of a a 8 -a 1 is taken to be 2.2 x 10 -24 cm 3 , giving for the molecular quadrupole moment of CO 2 — 4.1 x 10 -26 e.s.u., the sign indicating that the oxygen atoms are negative with respect to the carbon atom. The role of the ‘ quadrupole polarizability ’ of the molecule in complicating the interpretation of the experimental results is discussed, and experiments on argon and sulphur hexafluoride used to provide an estimate of its effect in the case of CO 2 .

Study of the Interaction between Silica Surfaces and the Carbon Dioxide Molecule

2010 ◽  
Vol 114 (41) ◽  
pp. 17773-17787 ◽  
Author(s):  
R. Roque-Malherbe ◽  
R. Polanco-Estrella ◽  
F. Marquez-Linares
Keyword(s):  
Carbon Dioxide ◽  
Carbon Dioxide Molecule ◽  
Silica Surfaces

scholarly journals Effect of Ruthenium and Cerium Oxide (IV) Promotors on the Removal of Carbon Deposit Formed during the Mixed Methane Reforming Process

Materials ◽  
2021 ◽  
Vol 14 (24) ◽  
pp. 7581
Author(s):  
Mateusz Zakrzewski ◽  
Oleksandr Shtyka ◽  
Radoslaw Ciesielski ◽  
Adam Kedziora ◽  
Waldemar Maniukiewicz ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Cerium Oxide ◽  
Nickel Catalyst ◽  
Catalytic System ◽  
Bimetallic Catalyst ◽  
Carbon Deposit ◽  
Methane Reforming ◽  
Carbon Deposits ◽  
Carbon Species ◽  
Gasification Of Carbon

This work investigates the effect of the addition of Ru and CeO2 on the process of gasification of carbon deposits formed on the surface of a nickel catalyst during the mixed methane reforming process. Activity studies of the mixed methane reforming process were carried out on (Ru)-Ni/CeO2-Al2O3 catalysts at the temperature of 650–750 °C. The ruthenium-promoted catalyst exhibited the highest activity. Carbonized post-reaction catalyst samples were tested with the TOC technique to investigate the carbonization state of the samples. The bimetallic catalyst had the lowest amount of carbon deposit (1.5%) after reaction at 750 °C. The reactivity of the carbon species was assessed in mixtures of oxygen, hydrogen, carbon dioxide, and water. Regardless of the gasifying agent used, the carbon deposit was removed from the surface of the catalytic system. The overall mechanism of mixed methane reforming over Ru and CeO2 was shown.

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