Absorption of sulfur dioxide in N-formylmorpholine: investigations of the kinetics of the liquid phase reaction

2002 ◽  
Vol 57 (22-23) ◽  
pp. 4883-4893 ◽  
Author(s):  
Dominik Nagel ◽  
Richard de Kermadec ◽  
Hans-Günther Lintz ◽  
Christine Roizard ◽  
François Lapicque
Keyword(s):  
Liquid Phase ◽  
Sulfur Dioxide ◽  
Phase Reaction ◽  
Kinetics Of ◽  
Liquid Phase Reaction

scholarly journals NMR Spectroscopic Method for Studying Homogenous Liquid Phase Reaction Kinetics in Systems used in Reactive Gas Absorption and Application to Monoethanolamine-water-carbon Dioxide

2021 ◽  
Author(s):  
Richard Behrens ◽  
Maximilian Dyga ◽  
Georg Sieder ◽  
Erik von Harbou ◽  
Hans Hasse
Keyword(s):  
Carbon Dioxide ◽  
Liquid Phase ◽  
Reaction Kinetics ◽  
Spectroscopic Method ◽  
Gas Absorption ◽  
Phase Reaction ◽  
Reactive Absorption ◽  
Kinetics Of ◽  
Liquid Phase Reaction ◽  
Reactive Gas

An NMR spectroscopic method for measuring homogenous liquid phase reaction kinetics in systems that are used in reactive gas absorption processes is presented. In the kinetic experiment, carbon dioxide loaded and unloaded aqueous amine solutions are mixed such that no gas phase is involved. This procedure enables studying liquid phase reaction kinetics without the influence of the kinetics of the physical absorption process. A rapid-mixing NMR flow cell is used for the measurements, which are carried out in stopped-flow mode. 1H NMR spectra are taken at short intervals to monitor the kinetic process. The cell is liquid thermostatted and pressure resistant, such that a wide range of conditions can be studied. The new method was used for studying reaction kinetics in the system monoethanolamine (MEA)–water (H2O)–carbon dioxide (CO2) at temperatures between 293 and 333 K. From the data, information on the kinetics of the reaction of MEA with bicarbonate (HCO3-) to form MEA carbamate was obtained. That reaction was investigated for the first time in the present work without using bicarbonate salts. An Arrhenius model was fitted to the new data. The formation of MEA carbamate from MEA and HCO3- is often neglected in models for describing the reactive absorption of CO2 with aqueous MEA solutions. A process simulation study carried out in the present work reveals that it should be taken into account in predictions of reactive absorption processes that are operated under elevated pressure with a high mole fraction of CO2 in the gaseous phase.

Products and Kinetics of the Liquid-Phase Reaction of Glyoxal Catalyzed by Ammonium Ions (NH4+)

2009 ◽  
Vol 113 (1) ◽  
pp. 231-237 ◽  
Author(s):  
Barbara Nozière ◽  
Pawel Dziedzic ◽  
Armando Córdova
Keyword(s):  
Liquid Phase ◽  
Phase Reaction ◽  
Ammonium Ions ◽  
Kinetics Of ◽  
Liquid Phase Reaction

The Reactivity of Different Active Forms of Sodium Carbonate with Respect to Sulfur Dioxide

1992 ◽  
Vol 57 (11) ◽  
pp. 2302-2308
Author(s):  
Karel Mocek ◽  
Erich Lippert ◽  
Emerich Erdös
Keyword(s):  
Thermal Decomposition ◽  
Liquid Phase ◽  
Sulfur Dioxide ◽  
Specific Surface ◽  
Surface Area ◽  
Sodium Carbonate ◽  
Room Temperature ◽  
Active Form ◽  
The Other ◽  
Kinetics Of

The kinetics of the reaction of solid sodium carbonate with sulfur dioxide depends on the microstructure of the solid, which in turn is affected by the way and conditions of its preparation. The active form, analogous to that obtained by thermal decomposition of NaHCO3, emerges from the dehydration of Na2CO3 . 10 H2O in a vacuum or its weathering in air at room temperature. The two active forms are porous and have approximately the same specific surface area. Partial hydration of the active Na2CO3 in air at room temperature followed by thermal dehydration does not bring about a significant decrease in reactivity. On the other hand, if the preparation of anhydrous Na2CO3 involves, partly or completely, the liquid phase, the reactivity of the product is substantially lower.

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