Modeling of Hydrate Dissociation Curves with a Modified Cubic-Plus-Association Equation of State
authors Palma, AM; Queimada, AJ; Coutinho, JAP
nationality International
journal INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
keywords MIXTURE CRITICAL LOCUS; CARBON-DIOXIDE; EQUILIBRIUM CONDITIONS; PHASE-EQUILIBRIUM; AQUEOUS-SOLUTIONS; HYDROGEN-SULFIDE; NORMAL-BUTANE; CPA EOS; METHANE; GAS
abstract A modified cubic-plus-association equation of state (CPA EoS) has been presented in recent works that enforces the representation of the pure component critical point, is based on an extended Mathias-Copeman alpha fiinction, and uses a volume shift to improve liquid densities. In this work, this same version of the CPA model is applied together with the hydrate van der Waals and Platteeuw model for the description of hydrate dissociation curves. The model is applied to the description of both single and mixed guest hydrates, the results being compared with the available experimental data, and the predictions obtained using the commercial hydrates model from the Multiflash software. This analysis shows that, for most cases, this approach is accurate, with results similar to those of Multiflash. The accuracy of the model for describing the three phase compositions in hydrate + liquid + gas systems is also discussed.
publisher AMER CHEMICAL SOC
issn 0888-5885
year published 2019
volume 58
issue 31
beginning page 14476
ending page 14487
digital object identifier (doi) 10.1021/acs.iecr.9b02432
web of science category Engineering, Chemical
subject category Engineering
unique article identifier WOS:000480496100063
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journal analysis (jcr 2019):
journal impact factor 3.573
5 year journal impact factor 3.684
category normalized journal impact factor percentile 69.58
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