| Titre : | Proposal of an optimal process for the removal of carbon dioxide and hydrogen sulfide contained in natural gas (Ain Saleh) | | Titre original : | Proposition d'un procédé optimal pour l'élimination du dioxyde de carbone et de l'hydrogène sulfuré contenu dans le gaz naturel de Ain Saleh | | Type de document : | texte manuscrit | | Auteurs : | Ahmed Abdelmouiz, Auteur ; Abdenacer Guibadj, Directeur de thèse ; Ahmed Hadjadj, Directeur de thèse | | Editeur : | Laghouat : Université Amar Telidji - Département des sciences de la matière | | Année de publication : | 2021 | | Importance : | 198 p | | Format : | 27 cm | | Accompagnement : | 1 disque optique numérique (CD-ROM) | | Langues : | Anglais | | Catégories : | THESES :06 chimie
| | Mots-clés : | Kinetics, Piperazine Zwitterion Stopped flow Sulfolane Mixed solvents | | Résumé : | The primary focus of this research is on developing comprehensive reaction rate/kinetics models that take into account the coupling between the chemical equilibrium and chemical kinetics of all possible chemical reactions for the absorption of CO2 into aqueous solutions of MDEA,PZ, blended (MDEA –PZ),blended (PZ –Sulfolane) , and blended (MDEA –Sulfolane) in order to explore the potential of these solvents for capturing CO2 in terms of reaction kinetics. The reaction kinetics of carbon dioxide in the aqueous mixed solvent solutions of (PZ+ Sulfolane) , and (MDEA+ Sulfolane) were studied for the first time using the stopped-flow technique. The absorption rates of carbon dioxide in the aqueous mixed solvent solutions of (PZ+ Sulfolane), and (MDEA+ Sulfolane) were higher than those of standalone PZ and MDEA at the same concentrations at all temperatures from (298.15 to 313.15) K. The study confirms the advantage of the commercially available Sulfinol technologies over standalone amine-based processes.
The solubility results over a wide range of temperature are useful for studying the solution properties in the chemical, biochemical, environmental protection, and energy industries. The solubility of CO2 in aqueous solutions of blended (MDEA-Sulfolane), and (MDEA-PZ) decreases as temperature increases because the solubility of CO2 declines with increasing temperature; thus, the system tends toward CO2 desorption rather than CO2 absorption. For the effect of CO2 partial pressure, the equilibrium solubility of CO2 increases as CO2 partial pressure increases due to the higher driving force for CO2 absorption at higher CO2 partial pressure.
The physical Solubility in the mixed aqueous solvent of (MDEA-Sulfolane) is higher than that of aqueous mixed (MDEA-PZ), as if there was a kind of “enhancement” in the solubility when MDEA was used with Sulfolane.
It is predicted that replacement of Sulfinol-M solvent has better performance and suitable economics compared to present solvent and other amine solvents, reduce energy consumption and reduce investment costs.
Based on the results obtained from this research in terms of reaction kinetics and absorption capacity, it can be concluded that the aqueous solution of blended (MDEA Sulfolane) have good potential to be used as the alternative solvents for capturing acid gas. | | note de thèses : | Thèse de doctorat en chimie |
Proposal of an optimal process for the removal of carbon dioxide and hydrogen sulfide contained in natural gas (Ain Saleh) = Proposition d'un procédé optimal pour l'élimination du dioxyde de carbone et de l'hydrogène sulfuré contenu dans le gaz naturel de Ain Saleh [texte manuscrit] / Ahmed Abdelmouiz, Auteur ; Abdenacer Guibadj, Directeur de thèse ; Ahmed Hadjadj, Directeur de thèse . - Laghouat : Université Amar Telidji - Département des sciences de la matière, 2021 . - 198 p ; 27 cm + 1 disque optique numérique (CD-ROM). Langues : Anglais | Catégories : | THESES :06 chimie
| | Mots-clés : | Kinetics, Piperazine Zwitterion Stopped flow Sulfolane Mixed solvents | | Résumé : | The primary focus of this research is on developing comprehensive reaction rate/kinetics models that take into account the coupling between the chemical equilibrium and chemical kinetics of all possible chemical reactions for the absorption of CO2 into aqueous solutions of MDEA,PZ, blended (MDEA –PZ),blended (PZ –Sulfolane) , and blended (MDEA –Sulfolane) in order to explore the potential of these solvents for capturing CO2 in terms of reaction kinetics. The reaction kinetics of carbon dioxide in the aqueous mixed solvent solutions of (PZ+ Sulfolane) , and (MDEA+ Sulfolane) were studied for the first time using the stopped-flow technique. The absorption rates of carbon dioxide in the aqueous mixed solvent solutions of (PZ+ Sulfolane), and (MDEA+ Sulfolane) were higher than those of standalone PZ and MDEA at the same concentrations at all temperatures from (298.15 to 313.15) K. The study confirms the advantage of the commercially available Sulfinol technologies over standalone amine-based processes.
The solubility results over a wide range of temperature are useful for studying the solution properties in the chemical, biochemical, environmental protection, and energy industries. The solubility of CO2 in aqueous solutions of blended (MDEA-Sulfolane), and (MDEA-PZ) decreases as temperature increases because the solubility of CO2 declines with increasing temperature; thus, the system tends toward CO2 desorption rather than CO2 absorption. For the effect of CO2 partial pressure, the equilibrium solubility of CO2 increases as CO2 partial pressure increases due to the higher driving force for CO2 absorption at higher CO2 partial pressure.
The physical Solubility in the mixed aqueous solvent of (MDEA-Sulfolane) is higher than that of aqueous mixed (MDEA-PZ), as if there was a kind of “enhancement” in the solubility when MDEA was used with Sulfolane.
It is predicted that replacement of Sulfinol-M solvent has better performance and suitable economics compared to present solvent and other amine solvents, reduce energy consumption and reduce investment costs.
Based on the results obtained from this research in terms of reaction kinetics and absorption capacity, it can be concluded that the aqueous solution of blended (MDEA Sulfolane) have good potential to be used as the alternative solvents for capturing acid gas. | | note de thèses : | Thèse de doctorat en chimie |
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Proposal of an optimal process for the removal of carbon dioxide and hydrogen sulfide contained in natural gas (Ain Saleh)
