Thermodynamic method for the prediction of solid CO2 formation from multicomponent mixtures |
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| Institution: | 1. Collaborative Research Center for Energy Engineering, Institute of Industrial Science, The University of Tokyo, 4-6-1 Komaba, Meguro-Ku, Tokyo 153-8505, Japan;2. Graduate School of Life and Environmental Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8572, Japan;1. GASP - Group on Advanced Separation Processes & GAS Processing, Dipartimento di Chimica, Materiali e Ingegneria Chimica “G. Natta”, Politecnico di Milano, Piazza Leonardo da Vinci 32, 20133, Milano, Italy;2. Eni S.p.A. Research and Technological Innovation Department, Via F. Maritano 26, San Donato Milanese, 20097, Italy;1. Department of Chemical Engineering, Brigham Young University, Provo, UT 84602, USA;2. Sustainable Energy Solutions LLC, Orem, UT 84057, USA;1. Politecnico di Milano, Department of Energy, Via Lambruschini, 4, 20156 Milan, Italy;2. Université de Lorraine, Ecole Nationale Supérieure des Industries Chimiques, Laboratoire Réactions et Génie des Procédés (UMR CNRS 7274), 1 Rue Grandville, 54000 Nancy, France;1. Fluid Science & Resources Division, Department of Chemical Engineering, The University of Western Australia, 35 Stirling Hwy, Crawley 6009, Australia;2. Oil & Gas Engineering, Department of Civil Engineering, Monash University, Clayton, VIC 3800, Australia;3. Chevron Energy Technology Company, Houston, TX 77002, USA |
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| Abstract: | The increase in GHG concentration has a direct effect on global climate conditions. Among the possible technologies to mitigate GHG emissions, CCS is being accepted to gain emission reduction. Such technology also involves cryogenic CO2 capture processes based on CO2 freeze-out or where the formation of solid CO2 must be avoided. Captured CO2 is usually transported in pipelines for the reinjection.The risk associated to the release of CO2 is due to the changing temperatures and pressures the system may experience, which can lead to the deposition of solid CO2 where it must be avoided. Prolonged exposure to dry ice can cause severe skin damage and its resublimation could pose a danger of hypercapnia. It is, thus, necessary to build up a tool able to predict the conditions in which CO2 can freeze-out.A thermodynamic methodology based on cubic EoSs has been developed which is able to predict solid–liquid–vapor equilibrium of CO2 mixtures with n-alkanes or H2S which are usually found in equipment for acidic gas, mainly natural gas, treatment.The focus is a detailed analysis of the method performances when more than two components are present since, for such a case, literature does not provide significant modeling results. |
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| Keywords: | Carbon dioxide Hydrogen sulfide Freeze-out Solid–liquid–vapor equilibrium SRK PR |
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