VLE modelling for aqueous systems containing methyldiethanolamine, carbon dioxide and hydrogen sulfide

Enthalpy of solution of CO2 in aqueous solutions of methyldiethanolamine at T=322.5K and pressure up to 5MPa

“…The thermopile sensitivity E (lV Á mW À1 ) is determined by chemical calibration using the reference {ethanol + water} system with the enthalpy data provided by Ott et al [15]. The experimental uncertainty on the enthalpy of solution is determined as a statistical estimate from the expected error in E, uncertainties on the molar flow rate and the heat power based on equation (5). The heat effect due to the gas dissolution corresponds to a calorimetric signal (S M -S BL ) ranging from (4 to 16) mV and has typically stability better than 0.1 mV.…”

“…The models are based on a system of equations for the chemical and phase equilibria, the electro-neutrality and the mass balance. The rigorous models as those of Deshmuk and Mather [2], Austgen et al [3], Li and Mather [4], Kuranov et al [5], and Silkenbaü mer et al [6] take into account the non-ideality of the system. Oscarson et al [7] have developed for given aqueous amine solutions a similar model for both phase equilibria and enthalpies of solution.…”

Modeling of (vapor+liquid) equilibrium and enthalpy of solution of carbon dioxide (CO2) in aqueous methyldiethanolamine (MDEA) solutions

“…For the amine protonation K A , several correlations are available in literature [6,8,[12][13][14][15]. Coefficients q 1 , q 2 , q 3 , and q 4 used in equation (3) are given in table 1 for selected data [6,8,15].…”

“…The more rigorous models that take into account non-ideality are based on a system of equations for chemical equilibria, phase equilibria, charge, and mass balances. We choose a c-U approach as used in the models of Deshmuk and Mather [3], Austgen et al [4], Li and Mather [5], Kuranov et al [6], Silkenbaümer et al [7], and Oscarson et al [8]. The models reported in the literature differ on the choice of the activity model and equation of state used to estimate activity and fugacity coefficients.…”

Enthalpy of solution of CO2 in aqueous solutions of 2-amino-2-methyl-1-propanol

“…Tontiwachwuthikul et al [2], Kritpiphat and Tontiwachwuthikul [3], Posey et al [4], Park et al [5], and Gabrielsen et al [6] have derived this model in order to optimise it. More sophisticated models taking into account the non-ideality were developed as for example those of Deshmuk and Mather [7], Austgen et al [8], Li and Mather [9] or Kuranov et al [10].…”