Oxidation kinetics of carbon monoxide in supercritical water

1987 ◽  
Vol 1 (5) ◽  
pp. 417-423 ◽  
Author(s):  
Richard K. Helling ◽  
Jefferson W. Tester
1990 ◽  
Author(s):  
Paul A. Webley ◽  
Henry R. Holgate ◽  
David M. Stevenson ◽  
Jefferson W. Tester

2021 ◽  
Vol 1 (1-2) ◽  
pp. 41-46
Author(s):  
E. V. Kovalyov ◽  
E. M. Sadovskaya ◽  
V. V. Aver’yanova ◽  
B. S. Bal’zhinimaev

Deep oxidation of hydrocarbons over platinum catalysts underlies the majority of processes for purification of industrial waste gases. Since waste gases usually contain carbon monoxide, it is important to investigate its effect on the oxidation kinetics of hydrocarbons. This paper considers results of the study on the oxidation kinetics of propane over a glass fiber platinum catalyst in the presence or absence of CO in the reaction mixture. It was found that at low temperatures the presence of CO strongly hinders the oxidation of propane, whereas upon temperature elevation this detrimental effect is replaced by the beneficial effect of CO. As shown by numerical modeling, this bidirectional effect can be attributed to the competitive adsorption of oxygen, propane and CO on the catalyst active sites.


2020 ◽  
Author(s):  
Camilo A. Mesa ◽  
Ludmilla Steier ◽  
Benjamin Moss ◽  
Laia Francàs ◽  
James E. Thorne ◽  
...  

<p><i>Operando</i> spectroelectrochemical analysis is used to determine the water oxidation reaction kinetics for hematite photoanodes prepared using four different synthetic procedures. Whilst these photoanodes exhibit very different current / voltage performance, their underlying water oxidation kinetics are found to be almost invariant. Lower photoanode performance was found to correlate with the observation of optical signals indicative of charge accumulation in mid-gap oxygen vacancy states, indicating these states do not contribute directly to water oxidation.</p>


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