Chemical Engineering Science | VOL. 214

Phase equilibrium measurements and modelling of mixed cyclopentane and carbon dioxide hydrates in presence of salts

Publication Date Mar 1, 2020


Abstract Interest of Clathrate hydrates for industrial applications is rising. While numerous studies can be found on carbon capture or desalination, this effort investigates thermodynamics of the combined process using cyclopentane (CP) as second guest molecule. This document provides numerous equilibrium data of mixed CP/CO2 hydrates in presence of salt (NaCl, KCl) under differents concentrations. Final dissociation points are collected, as well as intermediate dissociation points in presence of hydrates. While the first provide equilibrium data, the others are not at equilibrium. Indeed, Results show that, in presence of salts, several crystallization events occur in the system. Consequently, multiple hydrate structures could be formed in the bulk, such as pure CO2 hydrates and mixed CO2/CP hydrates. Finally, van der Waals and Platteeuw approach has been used and furnishes results within 0.4 K uncertainty compared to this work and within 0.5 K compared to literature. Besides, thermodynamic consistency of data has been evaluated.

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Phase Equilibrium Measurements
Dissociation Points
Thermodynamic Consistency

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