Experimental study and thermodynamic modelling of methane clathrate hydrate dissociation conditions in silica gel porous media in the presence of methanol aqueous solution |
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| Institution: | 1. Department of Chemical Engineering, Shiraz University of Technology, Shiraz 71555-313, Iran;2. MINES ParisTech, CEP/TEP – Centre Énergétique et Procédés, 35 Rue Saint Honoré, 77305 Fontainebleau, France;3. Thermodynamics Research Unit, School of Chemical Engineering, University of KwaZulu-Natal, Howard College Campus, King George V Avenue, Durban 4041, South Africa;1. Department of Chemistry, Queen''s University, Kingston, Ontario, Canada;2. Department of Chemical and Biomolecular Engineering, University of Notre Dame, Notre Dame, IN, USA;1. Department of Mechanical Engineering, Francis Xavier Engineering College, Tirunelveli, Tamil Nadu, India;2. Department of Mechanical Engineering, Rajalakshmi Institute of Technology, Chennai, Tamil Nadu, India;3. Department of Mechanical Engineering, WOLLO University, Kombolcha Institute of Technology, Ethiopia;4. Department of Mechanical Engineering, WOLLO University, Kombolcha Institute of Technology, Ethiopia;5. Department of Mechanical Engineering, St. John the Baptist University, South Africa;6. Department of Mechanical Engineering, Rajalakshmi Institute of Technology, Chennai, Tamil Nadu, India;1. State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing 102249, China;2. Department of Engineering, China University of Petroleum-Beijing at Karamay, Sinkang 834000, China;1. State Key Laboratory of Coal Mine Disaster Dynamics and Control, Chongqing University, Chongqing 400044, China;2. School of Resources and Safety Engineering, Chongqing University, Chongqing 400044, China |
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| Abstract: | In this work, the phase equilibria of clathrate hydrates of methane in the presence of pure water and 0.035 mass fraction of methanol aqueous solution in confined silica gel pores with (10 and 15) nm mean diameters are measured and reported. A thermodynamic model is also developed for prediction of the obtained experimental hydrate dissociation data. The Valderrama–Patel–Teja (VPT-EoS) equation of state (EoS) accompanied with the non-density dependent (NDD) mixing rules coupled with a previously developed activity model are applied to evaluate the fugacity of the species present and the activity coefficient of water in methanol aqueous solution. Acceptable agreement between the reported data and the predicted results using the proposed model and an existing method reported in the literature demonstrates the reliability of the presented model. |
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