Kinetics of the carbon monoxide conversion with steam at elevated pressures

1979 ◽  
Vol 44 (3) ◽  
pp. 652-659 ◽  
Author(s):  
Pavel Fott ◽  
Jan Vosolsobě ◽  
Vladimír Glaser
Keyword(s):  
Experimental Data ◽  
Carbon Dioxide ◽  
Carbon Monoxide ◽  
Reaction Kinetics ◽  
Gaseous Phase ◽  
Reaction Rate ◽  
Surface Reaction ◽  
Elevated Pressures ◽  
Limiting Step ◽  
Kinetics Of

The kinetics of the carbon monoxide conversion with steam on a Czechoslovak FeCr catalyst was investigated. The experimental data were obtained on a gradient-free differential reactor with recirculating gaseous phase at temperatures of 633 and 693 K and pressures from the range 0.1-0.9 MPa. The evaluation of experimental data showed that the reaction rate increases with increasing pressure according to a downward convex and that it also increases with increasing content of carbon monoxide in the gas and with decreasing content of carbon dioxide. The reaction kinetics was described by an equation derived from the Langmuir-Hinshelwood concept for the case when the limiting step of the reaction is a surface reaction.

Effect of 1-D Nano-Confinement on the Kinetics of a Click-Chemistry Surface Reaction Used in Biosensors

2018 ◽  
Vol 282 ◽  
pp. 182-189
Author(s):  
Guy Vereecke ◽  
Haroen Debruyn ◽  
Quinten de Keyser ◽  
Rita Vos ◽  
Abhishek Dutta ◽  
...  
Keyword(s):  
Reaction Kinetics ◽  
Semiconductor Manufacturing ◽  
Reaction Rate ◽  
Surface Reaction ◽  
Double Layers ◽  
Planar Surface ◽  
Confined Spaces ◽  
Nano Structures ◽  
Water Structuring ◽  
Kinetics Of

In semiconductor manufacturing of 3-D nano-structures, modified kinetics have been encountered for the aqueous chemical etching of thin films in nano-confined spaces. A popular explanation relies on changes in reactant concentration from the overlap of electrostatic double layers (EDL) on opposite walls of the nano-structures. In this study, the cycloaddition of dibenzylcyclooctyne-PEG3-alcohol (DBCO) to a linear azide-terminated SAM was performed in nanochannels of width varying from 62 to 32 nm. ATR-FTIR was used to monitor the reaction kinetics, characterize water structuring and determine the pH in nanochannels. Reaction kinetics were slower in nanochannels as compared to a planar surface, while pH shifts were observed in absence of EDL overlap, with a significant influence of channel width. Actually only the overall decrease in reaction rate could be explained by EDL overlap. The discussion shows that the water structuring measured in nanochannels may play a significant role in the observed phenomena.

scholarly journals Reaction Kinetics of Carbon Dioxide in Aqueous Diethanolamine Solutions Using the Stopped-Flow Technique

2012 ◽  
Vol 19 (1) ◽  
pp. 55-66 ◽  
Author(s):  
Marta Siemieniec ◽  
Hanna Kierzkowska-Pawlak ◽  
Andrzej Chacuk
Keyword(s):  
Carbon Dioxide ◽  
Reaction Kinetics ◽  
Rate Constants ◽  
Reaction Rate ◽  
Reaction Rate Constant ◽  
Stopped Flow ◽  
First Order ◽  
Pseudo First Order ◽  
Kinetics Of ◽  
Good Agreement

Reaction Kinetics of Carbon Dioxide in Aqueous Diethanolamine Solutions Using the Stopped-Flow Technique The pseudo-first-order rate constants (kOV) for the reactions between CO2 and diethanolamine have been studied using the stopped-flow technique in an aqueous solution at 293, 298, 303 and 313 K. The amine concentrations ranged from 167 to 500 mol·m-3. The overall reaction rate constant was found to increase with amine concentration and temperature. Both the zwitterion and termolecular mechanisms were applied to correlate the experimentally obtained rate constants. The values of SSE quality index showed a good agreement between the experimental data and the corresponding fit by the use of both mechanisms.

scholarly journals Reaction Kinetics of Carbon Dioxide in Aqueous Blends of N-Methyldiethanolamine and L-Arginine Using the Stopped-Flow Technique

Processes ◽  
2019 ◽  
Vol 7 (2) ◽  
pp. 81 ◽  
Author(s):  
Nafis Mahmud ◽  
Abdelbaki Benamor ◽  
Mustafa Nasser ◽  
Muftah H. El-Naas ◽  
Paitoon Tontiwachwuthikul
Keyword(s):  
Carbon Dioxide ◽  
Reaction Kinetics ◽  
Reaction Rate ◽  
Carbon Dioxide Emission ◽  
Solution Concentration ◽  
Reaction Rate Constant ◽  
Stopped Flow ◽  
Promoting Effect ◽  
Absolute Deviation ◽  
Kinetics Of

: Reduction of carbon dioxide emission from natural and industrial flue gases is paramount to help mitigate its effect on global warming. Efforts are continuously deployed worldwide to develop efficient technologies for CO2 capture. The use of environment friendly amino acids as rate promoters in the present amine systems has attracted the attention of many researchers recently. In this work, the reaction kinetics of carbon dioxide with blends of N-methyldiethanolamine and L-Arginine was investigated using stopped flow technique. The experiments were performed over a temperature range of 293 to 313 K and solution concentration up to one molar of different amino acid/amine ratios. The overall reaction rate constant (kov) was found to increase with increasing temperature and amine concentration as well as with increased proportion of L-Arginine concentration in the mixture. The experimental data were fitted to the zwitterion and termolecular mechanisms using a nonlinear regression technique with an average absolute deviation (AAD) of 7.6% and 8.0%, respectively. A comparative study of the promoting effect of L-Arginine with that of the effect of Glycine and DEA in MDEA blends showed that MDEA-Arginine blend exhibits faster reaction rate with CO2 with respect to MDEA-DEA blend, while the case was converse when compared to the MDEA-Glycine blend.

Kinetics of pH equilibration in solutions of hydrogen carbonate during bubbling with a gas containing carbon dioxide

1985 ◽  
Vol 50 (3) ◽  
pp. 553-558
Author(s):  
Karel Lívanský
Keyword(s):  
Experimental Data ◽  
Carbon Dioxide ◽  
Chemical Equilibrium ◽  
Reaction Rate ◽  
Sudden Change ◽  
Hydrogen Carbonate ◽  
Equilibrium Data ◽  
Chemical Reaction Rate ◽  
Kinetics Of ◽  
Good Agreement

The kinetics of the title process is approximated by differential equations based on kinetic and equilibrium data for carbon dioxide. The course of pH after a sudden change of the concentration of CO2 in the gas is calculated by numerical integration. The course of pH during absorption of CO2 is different from that during desorption. The course of pH during desorption calculated on the assumption that the rate of the noncatalysed hydration of CO2 is sufficient to ensure chemical equilibrium is in good agreement with experimental data from the literature. During absorption of CO2 in a solution of hydrogen carbonate, the chemical reaction rate is sometimes insufficient to ensure chemical equilibrium prior to pH measurement.

Kinetics of carbon monoxide methanation on a Ni/SiO2 catalyst

1990 ◽  
Vol 55 (7) ◽  
pp. 1678-1685
Author(s):  
Vladimír Stuchlý ◽  
Karel Klusáček
Keyword(s):  
Carbon Monoxide ◽  
Reaction Rate ◽  
Catalyst Activity ◽  
Adsorbed Hydrogen ◽  
Reaction Products ◽  
Co Methanation ◽  
Molar Ratios ◽  
Rate Determining Step ◽  
Higher Temperature ◽  
Kinetics Of

Kinetics of CO methanation on a commercial Ni/SiO2 catalyst was evaluated at atmospheric pressure, between 528 and 550 K and for hydrogen to carbon monoxide molar ratios ranging from 3 : 1 to 200 : 1. The effect of reaction products on the reaction rate was also examined. Below 550 K, only methane was selectively formed. Above this temperature, the formation of carbon dioxide was also observed. The experimental data could be described by two modified Langmuir-Hinshelwood kinetic models, based on hydrogenation of surface CO by molecularly or by dissociatively adsorbed hydrogen in the rate-determining step. Water reversibly lowered catalyst activity and its effect was more pronounced at higher temperature.

Surface reaction kinetics of Ga1−xInxP growth during pulsed chemical beam epitaxy

2001 ◽  
Vol 178 (1-4) ◽  
pp. 63-74
Author(s):  
N. Dietz ◽  
S.C. Beeler ◽  
J.W. Schmidt ◽  
H.T. Tran
Keyword(s):  
Reaction Kinetics ◽  
Surface Reaction ◽  
Chemical Beam Epitaxy ◽  
Surface Reaction Kinetics ◽  
Kinetics Of

Reaction kinetics of carbon dioxide in aqueous blends of N-methyldiethanolamine and glycine using the stopped flow technique

2016 ◽  
Vol 33 ◽  
pp. 186-195 ◽  
Author(s):  
Abdelbaki Benamor ◽  
Mohammed Jaber Al-Marri ◽  
Majeda Khraisheh ◽  
Mustafa S. Nasser ◽  
Paitoon Tontiwachwuthikul
Keyword(s):  
Carbon Dioxide ◽  
Reaction Kinetics ◽  
Stopped Flow ◽  
Kinetics Of

Non-linear Surface Reaction Kinetics of GaAs MOVPE Explored by Selective Area Growth

2019 ◽  
Vol 2 (7) ◽  
pp. 145-156
Author(s):  
Haizheng Song ◽  
M. Sugiyama ◽  
Yoshiaki Nakano ◽  
Yukihiro Shimogaki
Keyword(s):  
Reaction Kinetics ◽  
Surface Reaction ◽  
Selective Area Growth ◽  
Selective Area ◽  
Area Growth ◽  
Non Linear ◽  
Surface Reaction Kinetics ◽  
Kinetics Of
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