Absorption of H₂S and CO₂in Alkanolamine Aqueous Solution: Experimental Data and Modelling with the Electrolyte-NRTL Model

Abstract

Résumé -Absorption de H 2 S et CO 2 dans des solutions aqueuses d'alcanolamine : mesures expérimentales et modélisation avec le modèle NRTL-Electrolyte-Au cours de ce travail, nous nous sommes intéressés à l'absorption de gaz acides (H 2 S et CO 2 ) dans des solutions aqueuses d'alcanolamine. La première partie de cet article présente l'appareillage expérimental développé pour déterminer la pression partielle en gaz acide en fonction du taux de charge (en phase liquide) en utilisant la méthode synthétique. De nouvelles mesures sur les systèmes Eau + diéthanolamine + CO 2 et Eau + diéthanolamine + H 2 S ont été réalisées. La deuxième partie s'intéresse à la modélisation de telles données. Le modèle utilisé couple l'aspect réactions chimiques en phase liquide avec l'aspect équilibre de phases. Nous avons mis en oeuvre le modèle NRTL-Electrolyte pour décrire la phase liquide et l'équation d'état de Peng et Robinson pour décrire la phase vapeur. Les paramètres du modèle NRTLElectrolyte sont déterminés sur les données expérimentales de pression partielle en gaz acide des systèmes étudiés. Abstract -Absorption of H 2 S and CO 2 in Alkanolamine Aqueous Solution: Experimental Data andModelling with the Electrolyte-NRTL Model -In this work, we are interested in acid gas (H 2 S and CO 2 ) removal by aqueous solutions of alkanolamine. The first part of the article deals with the development of the experimental apparatus used to determine the partial acid gas pressure as a function of acid gas loading in the reactive liquid phase with the synthetic method. New measurements on water + diethanolamine + CO 2 and water + diethanolamine + H 2 S systems were performed. The second part concerns the modelling of such data. The model used couples the chemical reactions in liquid phase with the phase equilibrium. We use the electrolyte NRTL model for the liquid phase and the Peng and Robinson equation of state to describe the vapour phase. The parameters of the electrolyte NRTL model are determined on experimental acid gas partial pressure data of the studied systems.Petroleum Industry Applications of Thermodynamics Applications de la thermodynamique dans l'industrie pétrolière

Estudo Da Produção De Energia Elétrica a Partir De Biogás Com E Sem Purificação De Estação De Tratamento De Esgoto

“…A remoção do ácido sulfídrico e dióxido de carbono foi realizada em uma coluna de absorção (Absorption Column) operando com uma solução de dietanolamina (DEA) a 27,95% (em volume) em contracorrente com o biogás (Elfattah et al, 2016;Barreau et al, 2006). Dentre os fatores que afetam a eficiência do processo de purificação encontramse a temperatura e pressão de operação da coluna e a concentração do solvente.…”

Comparison of Separation Performance of a Structured Packed Column with a Tray-Type Column for H2S and CO2

“…In the inlet of each segment, bulk concentrations of H 2 O, H 3 O + , CO 3 2-and S 2-are calculated by the method of Barreau et al [22]. Concentrations of these components are either too low, such as H 3 O + , CO 3 2-and S 2-, or too high, such as H 2 O, which are reasonably assumed to be invariant until we reach the next segment.…”

Simultaneous Solubilities of CO2and H2S in Diethanolamine Aqueous Solution

“…Details of our equipment are reported in our previous work (Barreau et al, 2006). It has been improved in order to determine the compositions of CO 2 and H 2 S in the gaseous phase by adding the sampler ROLSI TM (Guilbot et al, 2000) and a GC analyser.…”

“…The experimental procedure to study the solubility of a single acid gas is fully detailed in our previous work (Barreau et al, 2006). The solvent (water + diethanolamine) is prepared by weighing and degassed by a cryogenic method.…”

“…The experimental apparatus has already been used to study single acid gas (H 2 S or CO 2 ) solubility in aqueous solutions of diethanolamine (Barreau et al, 2006). It has been improved to measure CO 2 +H 2 S mixtures solubility by adding a sampling loop to analyse the vapour phase.…”