Results 111 to 120 of about 387 (144)

Deterministic Models for Performance Analysis of Lignocellulosic Biomass Torrefaction. [PDF]

ACS Omega
Azarpour A, Zendehboudi S, Saady NMC.
europepmc   +1 more source

Modeling electrolyte solutions with the extended universal quasichemical (UNIQUAC) model

Pure and Applied Chemistry, 2005
Abstract The extended universal quasichemical (UNIQUAC) model is a thermodynamic model for solutions containing electrolytes and nonelectrolytes. The model is a Gibbs excess function consisting of a Debye–Hückel term and a standard UNIQUAC term. The model only requires binary ion-specific interaction parameters.
KAJ Thomsen
exaly   +3 more sources

Thermodynamic modeling of CO2 absorption in aqueous N-Methyldiethanolamine using Extended UNIQUAC model

Fuel, 2015
Abstract A Thermodynamic model that can predict the behavior of the gas sweetening process over the applicable conditions is of vital importance in industry. In this work, Extended UNIQUAC model parameters optimized for the CO 2 -MDEA-H 2 O system are presented. Different types of experimental data consisting of pure MDEA vapor pressure, vapor–liquid
Negar Sadegh, Erling H Stenby, KAJ Thomsen   +2 more
exaly   +3 more sources

Extended UNIQUAC model for thermodynamic modeling of CO2 absorption in aqueous alkanolamine solutions

Fluid Phase Equilibria, 2009
Abstract The extended UNIQUAC model [K. Thomsen, P. Rasmussen, Chem. Eng. Sci. 54 (1999) 1787–1802] was applied to the thermodynamic representation of carbon dioxide absorption in aqueous monoethanolamine (MEA), methyldiethanolamine (MDEA) and varied strength mixtures of the two alkanolamines (MEA–MDEA).
Georgios M Kontogeorgis, KAJ Thomsen, Erling H Stenby   +2 more
exaly   +3 more sources

Thermodynamic modeling of hydrogen sulfide absorption by aqueous N-methyldiethanolamine using the Extended UNIQUAC model

Fluid Phase Equilibria, 2015
Abstract Aqueous MDEA is the most commonly used solvent for H 2 S removal from natural gas. A reliable thermodynamic model is required for the proper design of natural gas sweetening processes. In this study, a rigorous thermodynamic model is developed to represent properties of the H 2 S–MDEA–H 2 O ternary system.
Negar Sadegh, Erling H Stenby, KAJ Thomsen   +2 more
exaly   +3 more sources

Process simulation of CO2 capture with aqueous ammonia using the Extended UNIQUAC model

International Journal of Greenhouse Gas Control, 2012
Abstract The use of aqueous ammonia is a promising option to capture carbon dioxide from power plants thanks to the potential low heat requirement during the carbon dioxide desorption compared to monoethanolamine (MEA) based process. The patented Chilled Ammonia Process developed by Alstom absorbs carbon dioxide at low temperature (2–10 °C).
Bjørn Maribo-Mogensen, Erling H Stenby, KAJ Thomsen   +2 more
exaly   +3 more sources

Extended UNIQUAC model for correlation and prediction of vapour–liquid–solid equilibria in aqueous salt systems containing non-electrolytes. Part A. Methanol–water–salt systems

Chemical Engineering Science, 2000
Abstract The Extended UNIQUAC model has previously been used to describe the excess Gibbs energy for aqueous electrolyte mixtures. It is an electrolyte model formed by combining the original UNIQUAC model, the Debye–Huckel law and the Soave–Redlich–Kwong equation of state.
Maria C Iliuta, KAJ Thomsen
exaly   +3 more sources

Extended UNIQUAC model for correlation and prediction of vapor–liquid–liquid–solid equilibria in aqueous salt systems containing non-electrolytes. Part B. Alcohol (ethanol, propanols, butanols)–water–salt systems

Chemical Engineering Science, 2004
Abstract The Extended UNIQUAC model for electrolyte solutions is an excess Gibbs energy function consisting of a Debye–Huckel term and a term corresponding to the UNIQUAC equation. For vapor–liquid equilibrium calculations, the fugacities of gas-phase components are calculated with the Soave–Redlich–Kwong equation of state.
KAJ Thomsen, Maria C Iliuta
exaly   +3 more sources

Prediction of mineral scale formation in geothermal and oilfield operations using the extended UNIQUAC model

Geothermics, 2005
Two additional parameters to account for the pressure dependency of solubility are added to the Extended UNIQUAC model presented by Thomsen and Rasmussen (1999).
KAJ Thomsen, Erling H Stenby
exaly   +3 more sources

Thermodynamic modeling using extended UNIQUAC and COSMO-RS-ES models: Case study of the cesium nitrate-water system over a large range of temperatures

Fluid Phase Equilibria
A comparison of two thermodynamic models is presented using the water-cesium nitrate system as case study. Both models were able to model the thermodynamic properties such as the osmotic coefficient, vapor pressure, mean activity coefficient and solubility with good accuracy.
KAJ Thomsen, Simon Müller, Irina Smirnova   +2 more
exaly   +3 more sources