A5105457971- Carbon Dioxide Capture Technologies
- Phase Equilibria and Thermodynamics
- Membrane Separation and Gas Transport
- Thermodynamic properties of mixtures
- Chemical and Physical Properties in Aqueous Solutions
- Chemical Thermodynamics and Molecular Structure
- Process Optimization and Integration
- Ionic liquids properties and applications
- Adsorption and Cooling Systems
- Atmospheric and Environmental Gas Dynamics
- Advanced Thermodynamics and Statistical Mechanics
- Gas Dynamics and Kinetic Theory
- Refrigeration and Air Conditioning Technologies
- Carbon dioxide utilization in catalysis
- Chemical Looping and Thermochemical Processes
- NMR spectroscopy and applications
- Adsorption, diffusion, and thermodynamic properties of materials
- Fluid Dynamics and Mixing
- CO2 Reduction Techniques and Catalysts
- Metal-Organic Frameworks: Synthesis and Applications
- Analytical Chemistry and Chromatography
- Chemical and Environmental Engineering Research
- Catalytic Processes in Materials Science
- Groundwater and Isotope Geochemistry
- Water Quality Monitoring and Analysis
Norwegian University of Science and Technology
2014-2025
SINTEF
2006-2008
Monoethanolamine (MEA) is commonly used as a benchmark for solvent development within postcombustion CO2 capture. The physical properties data this system are scarce, especially loaded solutions. In paper new measurements of (density, viscosity, and N2O solubility) unloaded solutions presented. Available literature were collected, semiempirical models developed shown to represent all experimental very well.
13C NMR spectroscopic investigations were performed on aqueous solutions of diethylenetriamine (DETA) and carbon dioxide at 298.0 K. Systems with loadings ranging from 0 to 1.69 studied. Results suggest that carbamate is one the main species formed in system below 1.0. At higher (>1.0), it appears dicarbamate dominating HCO3-/CO32- are also formed. No clear evidence was found any tricarbamate system.
The kinetics of CO2 absorption into an unloaded aqueous solution the potassium salt sarcosine (KSAR) was studied using a string-of-disks contactor for concentration range 1.0–4.0 kmol m–3 and temperatures 25–62 °C. zwitterion termolecular mechanisms were reinterpreted to account nonidealities in systems due effect ionic strength through introduction factor, kion. Both models adequately represent experimental data with no practical difference. reaction rate constant KSAR is high but...
Qualitative and quantitative 13C NMR studies were performed on 30 wt % aqueous solution of 2-amino-2-methyl-1-propanol (AMP) with different amount CO2 at 25 °C. The results suggested that the main species in this system are: AMP/AMPH+, AMPCO2− HCO3−/CO32−. carbamate was observed low loading stability constant calculated based only experimental concentration from analysis. Based liquid phase speciation NMR, mol fraction basis found to be about 0.47
Temperature dependent correlations for enthalpy of deprotonation, carbamate formation, and heat absorption the overall reaction between aqueous MEA MDEA gaseous CO2 are calculated on basis computational chemistry based ln K values input to Gibbs-Helmholtz equation. dependency equilibrium constants deprotonation formation reactions is with SM8T continuum solvation model coupled density functional theoretical calculations at B3LYP/6-311++G(d,p) level theory. Calculated enthalpies individual...
Thermodynamic modeling of the solubility carbon dioxide (CO2) vapor/liquid equilibrium into aqueous solutions 2.5 M diethylenetriamine (DETA) was developed. The Deshmukh-Mater (DM) model implemented to this system for predicting CO2 partial pressures against loading different temperatures. A two step procedure, in general, is needed fit parameters DM model. However, work only first (the Debye–Hückel part) executed because, with complexity DETA system, available experimental data material not...
Qualitative 13C-NMR experiments were performed at 298 K and for different loadings to investigate the liquid speciation in amino acid neutralized by both strong inorganic weak organic bases. The two systems, potassiumsarcosinate(KSAR) sarcosine blended with equinormal quantities of 3-(methylamino)propylamine (MAPA-SAR) studied. In presence CO2, spectra MAPA-SAR system showed more species than that K-SAR due carbamates from primary, secondary amine groups even very low loadings. This means...
Several amino acids including Glycine, L-Alanine, Taurine, Sarcosine, L-Serine, L-Proline, blended with monoethanolamine (MEA) in presence of different amounts CO2 were qualitatively and quantitatively studied by NMR spectroscopy. 1D 2D employed to determine the carbamate formation from amine group acids. All species identified reported this work. The preliminary quantitative 13C have shown that highest occurs loaded taurine –MEA system lowest L-alanine – MEA system. In present work,...
The solubilities of N2O in aqueous diethylenetriamine (DETA) solution at different mass fractions (15, 30, 45, 60, 75, 90, and 100) % DETA were measured temperatures (297.7 to 360.7) K. solubility is strongly dependent on both temperature fraction DETA. A semiempirical model considering the excess quantity Henry's constant was correlated with Redlich−Kister equation. gave satisfactory agreement experimental data.
The kinetics of the reactions primary and secondary amine groups in aqueous DETA solution were measured a string discs contactor at different concentrations temperatures. reaction rates group performed very low loading for H2SO4 was used to neutralize groups. increase with increasing concentration temperature. order is found be broken-order vary slightly Both termolecular zwitterion mechanisms applied interpret experimental data gave identical result. water contribute carbamate formation...