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FORMATION OF HYDRATE FROM SINGLE-PHASE AQUEOUS SOLUTIONS

Zhang, Yi (2003) FORMATION OF HYDRATE FROM SINGLE-PHASE AQUEOUS SOLUTIONS. Master's Thesis, University of Pittsburgh. (Unpublished)

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Abstract

Experimental and theoretical research on the formation of hydrate from single-phase solutions of the hydrate former dissolved in water is described in this work. Two-phase equilibrium between carbon dioxide hydrate (H) and a water-rich liquid (L) are experimentally measured and theoretically described between 273 K and 280 K and at pressures to 60 MPa. Concentrations of carbon dioxide in the water phase ranging between 0.014 and 0.022 were studied. The theoretical and experimental results both indicate that the equilibrium pressure is very sensitive to concentration at all temperatures. These equilibria represent the solubility of carbon dioxide hydrate in a water phase and if a constant aqueous composition LH curve is extrapolated to the three-phase VLH curve, the composition characterizing the LH curve also represents the solubility of carbon dioxide in water at the VLH conditions. Since the solubility of carbon dioxide in water at hydrate- forming conditions is difficult to obtain, this method provides an excellent way of indirectly measuring this three-phase solubility.

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Details

Item Type: University of Pittsburgh ETD
Status: Unpublished
Creators/Authors:
CreatorsEmailPitt UsernameORCID
Zhang, Yiyiz12@pitt.eduYIZ12
ETD Committee:
TitleMemberEmail AddressPitt UsernameORCID
Committee ChairHolder, Geraldholder@engrng.pitt.eduGDHVMS
Committee MemberWender, Irvingwender@engrng.pitt.edu
Committee MemberEnick, Robertenick@engrng.pitt.edu
Committee MemberWarzinski, Robertrobert.warzinski@netl.doe.gov
Date: 8 May 2003
Date Type: Completion
Defense Date: 7 February 2003
Approval Date: 8 May 2003
Submission Date: 14 April 2003
Access Restriction: No restriction; Release the ETD for access worldwide immediately.
Institution: University of Pittsburgh
Schools and Programs: Swanson School of Engineering > Chemical Engineering
Degree: MSChE - Master of Science in Chemical Engineering
Thesis Type: Master's Thesis
Refereed: Yes
Uncontrolled Keywords: carbon dioxide solubility; Hydrate Formation; phase equilibrium; Single-phase Solutions
Other ID: http://etd.library.pitt.edu:80/ETD/available/etd-04142003-220543/, etd-04142003-220543
Date Deposited: 10 Nov 2011 19:37
Last Modified: 15 Nov 2016 13:40
URI: http://d-scholarship.pitt.edu/id/eprint/7136

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