CO2-activation by size-selected tantalum cluster cations (Ta1-16+): thermalization governing reaction selectivity

Author(s):  
Nikita Levin ◽  
Johannes T Margraf ◽  
Jozef Lengyel ◽  
Karsten Reuter ◽  
Martin Tschurl ◽  
...  

The reactions of tantalum cluster cations of different sizes toward carbon dioxide are studied in an ion trap under multi-collisional conditions. For all sizes studied, consecutive reactions with several CO2...

2021 ◽  
Author(s):  
Elizabeth Hamilton ◽  
Alexander Kilpatrick ◽  
Zoe Turner ◽  
Duncan Fraser ◽  
Jean-Charles Buffet ◽  
...  

We report the synthesis and characterisation of new permethylpentalene zirconium bis(amido) and permethylpentalene zirconium cyclopentadienyl mono(amido) complexes, and their reactivity with carbon dioxide.


1986 ◽  
Vol 51 (1) ◽  
pp. 54-65
Author(s):  
Jiří Hanyka ◽  
Alena Fialová

A system of differential equations for consecutive reactions inside a nonisotropic catalyst particle under conditions of internal diffusion is solved. The system of diffusion equations for the spherical geometry of the catalyst grain is numerically solved by using the collocation method. The solution is sought for various radial activity profiles across the catalyst particle and for various values of Thiele's modulus for the two consecutive reactions. The effect of the reaction orders with respect to the reactants on the degree of utilization of the internal catalyst surface and on the reaction selectivity is examined.


2019 ◽  
Vol 123 (17) ◽  
pp. 11101-11108 ◽  
Author(s):  
Xia-Guang Zhang ◽  
Yuxiu Liu ◽  
Chao Zhan ◽  
Xi Jin ◽  
Qijin Chi ◽  
...  

2019 ◽  
Vol 12 (5) ◽  
pp. 1668-1678 ◽  
Author(s):  
Silvan Suter ◽  
Sophia Haussener

Mass transport is responsible for the substantial rise in reaction selectivity with increasing thickness of mesostructured silver catalyst films.


Author(s):  
Xiao Chao Zhang ◽  
Tan Li ◽  
Xiushuai Guan ◽  
Changming Zhang ◽  
Rui Li ◽  
...  

Carbon dioxide (CO2) activation by effective electrons has been regarded as the rather necessary first-step for CO2 reduction reaction (CO2RR). Additionally, the electron migration and photoreaction selectivity are closely associated...


Author(s):  
K. C. Tsou ◽  
J. Morris ◽  
P. Shawaluk ◽  
B. Stuck ◽  
E. Beatrice

While much is known regarding the effect of lasers on the retina, little study has been done on the effect of lasers on cornea, because of the limitation of the size of the material. Using a combination of electron microscope and several newly developed cytochemical methods, the effect of laser can now be studied on eye for the purpose of correlating functional and morphological damage. The present paper illustrates such study with CO2 laser on Rhesus monkey.


Author(s):  
Charles TurnbiLL ◽  
Delbert E. Philpott

The advent of the scanning electron microscope (SCEM) has renewed interest in preparing specimens by avoiding the forces of surface tension. The present method of freeze drying by Boyde and Barger (1969) and Small and Marszalek (1969) does prevent surface tension but ice crystal formation and time required for pumping out the specimen to dryness has discouraged us. We believe an attractive alternative to freeze drying is the critical point method originated by Anderson (1951; for electron microscopy. He avoided surface tension effects during drying by first exchanging the specimen water with alcohol, amy L acetate and then with carbon dioxide. He then selected a specific temperature (36.5°C) and pressure (72 Atm.) at which carbon dioxide would pass from the liquid to the gaseous phase without the effect of surface tension This combination of temperature and, pressure is known as the "critical point" of the Liquid.


2001 ◽  
Vol 7 (7) ◽  
pp. 789-796 ◽  
Author(s):  
L. H. Ziska ◽  
O. Ghannoum ◽  
J. T. Baker ◽  
J. Conroy ◽  
J. A. Bunce ◽  
...  

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