نتایج جستجو برای: saft eos

تعداد نتایج: 4163  

Journal: :Chemical Engineering Research & Design 2021

From the presented experimental data of two CO2-rich mixtures containing SO2 and CO as impurities anthropogenic CO2, we evaluated impact simultaneous presence these on transport, injection storage carbon capture (CCS) technology. We determined density, vapor-liquid equilibrium speed sound a cocapture mixture (non-purified captured flue gas) [CO2 + 4.93 mol% 3.01 CO] representative European emis...

2017
Ioannis Tsivintzelis Georgios M. Kontogeorgis

The cubic-plus-association (CPA) model is an equation of state (EoS) that combines the Soave−Redlich−Kwong (SRK) equation with the association term from Wertheim’s theory as used in statistical associating fluid theory (SAFT). In the form used here, the CPA EoS does not include separate terms for the polar and quadrupolar contributions. The capabilities and limitations of the CPA model when it ...

2004
Clare McCabe Sergei B. Kiselev

SAFT is perhaps the most versatile, fundamentally, based engineering equation of state in use today. However, in common with all analytic equations of state, SAFT exhibits classical behavior in the critical region rather than the non-analytical, singular behavior seen in real fluids. Recently, so-called crossover equations of state have been developed which solve this shortcoming by incorporati...

Journal: :Energy Conversion and Management 2021

The use of a binary cycle coupled to the complete reinjection non-condensable gases could provide valid answer improvement sustainability geothermal plants. In recent years, interest in CO2 as working fluid transcritical cycles has increased. However, low critical temperature carbon dioxide (?30 °C) requires cooling cycle, temperatures below 15 °C, which are not always available. this work, ove...

We developed an equation of state (EOS) by Ihm, Song, and Mason (ISM) for polar fluids. The model consists of four parameters, namely, the second virial coefficient, an effective van der Waals co-volume, a scaling factor, and the reduced dipole moment. The second virial coefficient is calculated from a correlation that uses the heat of vaporization, and the liquid density at the normal boiling ...

ژورنال: فرآیند نو 2013

در این کار، معادله حالت ساده شده SAFT مشابه با معادله حالت ساده شده PC-SAFT برای مدل‌سازی تعادل فازی بخار- مایع سیستم‌هایی شامل مواد غیرتجمعی- غیرتجمعی، تجمعی- غیرتجمعی و تجمعی- تجمعی، بکار رفته است. در این کار، از معادله حالت ساده شده SAFT برای بررسی تعادل فازی بخار- مایع سیستم‌های دوجزئی متان- پروپان، متانول- پنتان و آب- متانول استفاده شده است. دراین مقاله، در معادله حالت ساده شده SAFT از تاب...

2006
Nuno Pedrosa Lourdes F. Vega João A. P. Coutinho Isabel M. Marrucho

We present here phase equilibria calculations of polyethylene solutions in different solvents as obtained with two versions of the SAFT equation of state, soft-SAFT and PC-SAFT. The objective of this work is twofold: to check the accuracy of the soft-SAFT equation in providing reliable polymer solutions behavior and to propose a methodology from which systematic studies on polymer solutions can...

Journal: :The journal of physical chemistry. B 2005
Lixin Sun Honggang Zhao Sergei B Kiselev Clare McCabe

The SAFT-VRX equation of state combines the SAFT-VR equation with a crossover function that smoothly transforms the classical equation into a nonanalytical form close to the critical point. By a combinination of the accuracy of the SAFT-VR approach away from the critical region with the asymptotic scaling behavior seen at the critical point of real fluids, the SAFT-VRX equation can accurately d...

2013
Stephen A. MOSEY Peter C. CHARLTON Ian WELLS

In B-mode imaging, lateral resolution is impeded by the size and shape of the ultrasound beam used to create the image. For improved lateral resolution, a focussing method that utilises a beam model calculated using the Fraunhofer far field approximations to enhance the Synthetic Aperture Focussing Technique (SAFT) is proposed. The Beam Model Weighted Synthetic Aperture Focussing Technique (BMW...

2005
Lixin Sun Honggang Zhao Sergei B. Kiselev Clare McCabe

In previous work, we developed the crossover SAFT–VR equation of state (SAFT–VRX) for pure fluids by following the crossover approach proposed by Kiselev. The SAFT–VRX equation was shown to be very accurate in the prediction of PVT and phase behaviour for both nonassociating and associating fluids. In particular, simple expressions for the potential model parameters for the n-alkane homologous ...

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