A Study of Modified Equations of State for Vapor-liquid Equilibrium Predictions PDF Download
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Author: Shuen-cheng Hwang
Publisher:
ISBN:
Category :
Languages : en
Pages : 224
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Book Description
Author: Shuen-cheng Hwang
Publisher:
ISBN:
Category :
Languages : en
Pages : 224
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Book Description
Author: Hasan Orbey
Publisher: Cambridge University Press
ISBN: 9780521620277
Category : Science
Languages : en
Pages : 230
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Book Description
Reviews the latest developments in a subject relevant to professionals involved in the simulation and design of chemical processes - includes disk of computer programs.
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 10
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Book Description
Author: Anas Hamed
Publisher:
ISBN:
Category : Equations of state
Languages : en
Pages : 290
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Book Description
Author: Juan Francisco Javier Alvarado
Publisher:
ISBN:
Category : Collineation
Languages : en
Pages : 436
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Book Description
Author: Yehia Fahim Khalil
Publisher:
ISBN:
Category :
Languages : en
Pages : 342
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Book Description
Author: Ray Noble Finch
Publisher:
ISBN:
Category : Extraction (Chemistry)
Languages : en
Pages : 226
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Book Description
Author: Jens M. Sørensen
Publisher: Dechema
ISBN:
Category : Science
Languages : en
Pages : 682
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Book Description
Author: A. G. Duncan
Publisher:
ISBN:
Category : Vapor-liquid equilibrium
Languages : en
Pages : 20
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Book Description
Author: Todd T. Nichols
Publisher:
ISBN: 9780438392663
Category : Vapor-liquid equilibrium
Languages : en
Pages : 488
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Book Description
The predictive error relative to analytic values of entire-curve Wagner constants is studied for the reduced vapor pressures predicted by Wagner constants that are parameterized from a limited data interval. An algebraic solution for the fully-determined case based on only four data points is used to estimate the limited-data Wagner constants. First, seventy-two species are used to assess the impact of the location of the two interior points and the location and width of the limited-data interval upon the error in predicted P v,r due to data imprecision. Hydrogen, helium, R152a, and water are used to assess error due to Wagner imperfection and compare predictive capability of the algebraic fully-determined and regressed over-determined approaches. Second, the repeatability/reproducibility of VLE data in the literature is studied by comparing reduced pressures calculated from Antoine constants applicable to a limited temperature interval with the entire-curve Wagner analytic values over the same limited-data interval. The entire-curve Wagner analytics are treated as "true" or "best" values and the Antoine analytic values as surrogate experimental data. Wagner constants for fifty-five species are subsequently estimated from the Antoine analytics for the fully-determined case, from which reduced vapor pressures below and above the interval are predicted and compared with the entire-curve Wagner analytics to estimate the ability of limited VLE data to be used to accurately represent the entire two-phase curve. The predictive capability of such limited-data Wagner constants is compared with that of the semi-theoretical Riedel and the empirical Ambrose-Walton equations. Lastly, reduced vapor pressures predicted from the standard and modified forms of the Riedel and Ambrose-Walton equations are used to parameterize the Wagner equation, again using the algebraic, fully-determined solution. The predictive power of such Wagner constants is compared to that of the underlying source correlations themselves. This is the first time the error of limited-data Wagner constants is segmented by interval location and width, between that due to data imprecision vs. equation imperfection, and fully- vs. over-determined solutions. Neither using a four-point, fully-determined solution rather than over-determination, nor using predictive correlations to supply "data" to a Wagner parameterization are instinctive approaches, and hence their novelty.
