Applied Thermodynamics of Fluids
Lingua: inglese
Editore: RSC Publishing, 2010
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Codice articolo CX-9781847558060
- Titolo
- Applied Thermodynamics of Fluids
- Autore
- Goodwin, Anthony R H
- Editore
- RSC Publishing
- Anno di pubblicazione
- 2010
- Condizione
- New
- Rilegatura
- HRD
- Lingua
- inglese
- ISBN 10
- 1847558062
- ISBN 13
- 9781847558060
- Peso dell'articolo
- 1026 grammi
Published under the auspices of both IUPAC and its affiliated body, the International Association of Chemical Thermodynamics (IACT), this book will serve as a guide to scientists or technicians who use equations of state for fluids. Concentrating on the application of theory, the practical use of each type of equation is discussed and the strengths and weaknesses of each are addressed. It includes material on the equations of state for chemically reacting and non-equilibrium fluids which have undergone significant developments and brings up to date the equations of state for fluids and fluid mixtures. Applied Thermodynamics of Fluids addresses the needs of practitioners within academia, government and industry by assembling an international team of distinguished experts to provide each chapter. The topics presented in the book are important to the energy business, particularly the hydrocarbon economy and the development of new power sources and are also significant for the application of liquid crystals and ionic liquids to commercial products. This reference will be useful for post graduate researchers in the fields of chemical engineering, mechanical engineering, chemistry and physics.
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Applied Thermodynamics of Fluids
By A. R. H. Goodwin, J. V. Sengers, C. J. PetersThe Royal Society of Chemistry
All rights reserved.
Contents
List of Contributors, xix,
Experimental Thermodynamics Series, xxi,
Acknowledgments, xxiii,
Chapter 1 Introduction Anthony R. H. Goodwin, Jan V. Sengers and Cornelis J. Peters, 1,
Chapter 2 Fundamental Considerations Angel Martín Martínez and Cor J. Peters, 5,
Chapter 3 The Virial Equation of State J. P. Martin Trusler, 33,
Chapter 4 Cubic and Generalized van der Waals Equations of State Ioannis G. Economou, 53,
Chapter 5 Mixing and Combining Rules Anthony R. H. Goodwin and Stanley I. Sandler, 84,
Chapter 6 The Corresponding-States Principle James F. Ely, 135,
Chapter 7 Thermodynamics of Fluids at Meso and Nano Scales Mikhail A. Anisimov and Christopher E. Bertrand, 172,
Chapter 8 SAFT Associating Fluids and Fluid Mixtures Clare McCabe and Amparo Galindo, 215,
Chapter 9 Polydisperse Fluids Dieter Browarzik, 280,
Chapter 10 Thermodynamic Behaviour of Fluids near Critical Points Hassan Behnejad, Jan V. Sengers and Mikhail A. Anisimov, 321,
Chapter 11 Phase Behaviour of Ionic Liquid Systems Maaike C. Kron and Cor J. Peters, 368,
Chapter 12 Multi-parameter Equations of State for Pure Fluids and Mixtures Eric W. Lemmon and Roland Span, 394,
Chapter 13 Equations of State in Chemical Reacting Systems Selva Pereda, Esteban Brignole and Susana Bottini, 433,
Chapter 14 Applied Non-Equilibrium Thermodynamics Signe Kjelstrup and Dick Bedeaux, 460,
Subject Index, 499,
CHAPTER 1
Introduction
ANTHONY R. H. GOODWIN, JAN V. SENGERS AND CORNELIS J. PETERS
In the series Experimental Thermodynamics the first and only volume concerned with equations of state for fluids and fluid mixtures was Volume V.5 This volume, which was published during 2000 in two parts, provided descriptions of equations of state, over an entire range of approaches and range of variables for their wide use in science, engineering and industry. Reference 5 included methods required to develop equations of state, including their theoretical bases and practical uses along with their strengths and limitations. Furthermore, the volume contained not only equations of state for simple fluids and fluid mixtures, but also for and more important classes of complex fluids and mixtures. In particular, the volume included associating fluids, ionic fluids, poly-disperse systems, polymers, and micelle-forming and other self-organizing systems. However, some subject matter of importance to the practitioner was omitted including equations of state specifically for chemically reacting fluids and methods applicable to non-equilibrium thermodynamics.
Since the year 2000, there have been over 15,000 publications in the academic scientific and engineering archival literature that in some form or other are concerned with equations of state. In addition, equations of state for chemically reacting and non-equilibrium fluids have received additional theoretical and practical attention and now deserve more detailed explanations than hitherto provided.
Both developments in the field and the desire to provide the content omitted in the previous volume motivated this text entitled Applied Thermodynamics of Fluids. The change in title also reflects a greater emphasis that has been placed on the application of theory, without recourse to derivations of the constitutive equations, while retaining the fundamental aspects. The volume includes thermodynamics at the nano and meso scale in Chapter 7, chemically reacting systems in Chapter 13 and the application of non-equilibrium thermodynamics in Chapter 14. This volume is intended to address the needs of practitioners within academia, government and industry. However, chapters from reference 5 regarding self-assembled systems and analytical solvable integral equations have been omitted in this work and as have in both volumes the use of computer simulations for the calculation of thermodynamic properties. The latter would deserve an in-depth coverage of its own and because of size limitations along with a recent special issue of Fluid Phase Equilibria and other publications reporting the Industrial Fluid Property Simulation Challenges, it was decided not to include the topic in the present volume.
Some chapters from Volume V5 have been revised and updated and are included here because of their fundamental importance to the topic: these appear in this text as Chapter 2, regarding Fundamental Considerations that is essential to determine the validity of any method adopted, Chapter 3, entitled Virial Equation of State, Chapter 4 concerned with Cubic and Generalized van der Waals Equations, Chapter 5, Mixing and Combining Rules, Chapter 6 on Corresponding States. Significantly greater prominence has been is given to Statistical Associating Fluid Theory (SAFT) in Chapter 8, while Chapter 9 provides and update on Poly-disperse fluids, Chapter 10 is concerned with the more general topic of Critical Behaviour, Chapter 11 reports on Ionic Fluids and Chapter 12 on the Multi-parameter Equations of State.
Applied Thermodynamics is published under the auspices of the Physical and BioPhysical Division (I) of the International Union of Pure and Applied Chemistry as a project proposed by the International Association of Chemical Thermodynamics (IACT) in its capacity as an organization affiliated with IUPAC. Consequently, throughout the text we have adopted the quantities, units and symbols of physical chemistry defined by IUPAC in the text commonly known as the Green Book. We have also adopted the ISO guidelines for the expression of uncertainty and vocabulary in metrology. Values of the fundamental constants and atomic masses of the elements have been obtained from references 21 and 22, respectively.
CHAPTER 2Fundamental Considerations
ANGEL MARTÍN MARTÍNEZ AND COR J. PETERS
2.1 Introduction
This chapter provides a thermodynamic toolbox and contains most of the important basic relations that are used in other chapters. The scope is restricted almost exclusively to the second law of thermodynamics and its consequence, but the treatment is still intended to be exemplary rather than definitive. New results are not presented as befits a discussion of fundamentals which are necessarily invariant with time.
2.2 Basic Thermodynamics
The state of a system may be described in terms of a small number of variables. For a phase in the absence of any external field, the second law of thermodynamics may be written as
[MATHEMATICAL EXPRESSION NOT REPRODUCIBLE IN ASCII] (2.1)
This equation shows that the change dU in the energy U may be described in terms of simultaneous changes dS in the entropy S, dV in the volume V, and dni in the amount of substance ni of the i components. It is often convenient to eliminate the size of the phase by writing eq 2.1 in terms of intensive variables. For example, division by the total amount n
[MATHEMATICAL EXPRESSION NOT REPRODUCIBLE IN ASCII] (2.2)
gives
[MATHEMATICAL EXPRESSION NOT REPRODUCIBLE IN ASCII] (2.3)
where the subscript m denotes a molar quantity and the mole fraction of component i is defined by
xi = ni/N, (2.4)
Equation 2.1, or eq 2.3 for intensive variables, is the fundamental expression of the second law of thermodynamics. However, entropy, in particular, is not a very convenient experimental variable and, consequently, alternative forms have been derived from the fundamental eq 2.1. Introduction of the following characteristic functions:
H = U + pV, (2.5)
A = U - TS, (2.6)
and
G = U + pV - TS = H - TS = A + pV. (2.7)
For enthalpy, Helmholtz and Gibbs functions and use of Legendre transformations with the fundamental eq 2.1 gives the following alternative forms of the second law
[MATHEMATICAL EXPRESSION NOT REPRODUCIBLE IN ASCII] (2.8)
[MATHEMATICAL EXPRESSION NOT REPRODUCIBLE IN ASCII] (2.9)
and
[MATHEMATICAL EXPRESSION NOT REPRODUCIBLE IN ASCII] (2.10)
Another modification of eq 2.1, frequently used in statistical mechanics, is
[MATHEMATICAL EXPRESSION NOT REPRODUCIBLE IN ASCII] (2.11)
or, as the Gibbs-Duhem equation, in the study of phase equilibria
[MATHEMATICAL EXPRESSION NOT REPRODUCIBLE IN ASCII] (2.12)
From eq 2.1 and eqs 2.8 to 2.10 we find the following:
[MATHEMATICAL EXPRESSION NOT REPRODUCIBLE IN ASCII] (2.13)
where the subscript [??]j means that the amount of substance nj of all the components are constant except for component i. The quantity µi is the chemical potential of species i. In terms of intensive variables these equations are
[MATHEMATICAL EXPRESSION NOT REPRODUCIBLE IN ASCII] (2.14)
[MATHEMATICAL EXPRESSION NOT REPRODUCIBLE IN ASCII] (2.15)
[MATHEMATICAL EXPRESSION NOT REPRODUCIBLE IN ASCII] (2.16)
[MATHEMATICAL EXPRESSION NOT REPRODUCIBLE IN ASCII] (2.17)
and
[MATHEMATICAL EXPRESSION NOT REPRODUCIBLE IN ASCII] (2.18)
For a system of constant composition, eq 2.1 and eqs 2.8 to 2.10 reduce to
dU = TdS - pdV, (2.19)
dH = TdS + Vdp, (2.20)
da = -SdT - pdV, (2.21)
and
dG = -SdT + Vdp, (2.22)
A large number of thermodynamic relations may be derived from the above equations by conventional manipulations. Table 2.1 summarizes the most frequently used equations.
2.2.1 Homogeneous Functions
A homogeneous function F of the first order in any number of the variables x, y, z, ... is defined by:
[MATHEMATICAL EXPRESSION NOT REPRODUCIBLE IN ASCII] (2.23)
where λ is an arbitrary number. If each independent variable is made λ times larger, the function F increases λ times. For large enough systems, all extensive thermodynamic functions are homogeneous and of the first order in amount of substance ni at fixed temperature and pressure. For homogeneous functions of the first order, Euler's theorem on homogeneous functions applies:
[MATHEMATICAL EXPRESSION NOT REPRODUCIBLE IN ASCII] (2.24)
Equation 2.24 relates the value of the function to the values of its derivatives. For λ = 1, eq 2.24 reduces to:
[MATHEMATICAL EXPRESSION NOT REPRODUCIBLE IN ASCII] (2.25)
By applying Euler's theorem to the various characteristic functions U = U (S, V, n1, n2, ···), H = H (S, p, n1, n2, ···), A = A (V, T, n1, n2, ···), G = G (p, T, n1, n2, ···), respectively, the following expressions result:
[MATHEMATICAL EXPRESSION NOT REPRODUCIBLE IN ASCII] (2.26)
[MATHEMATICAL EXPRESSION NOT REPRODUCIBLE IN ASCII] (2.27)
[MATHEMATICAL EXPRESSION NOT REPRODUCIBLE IN ASCII] (2.28)
and
[MATHEMATICAL EXPRESSION NOT REPRODUCIBLE IN ASCII] (2.29)
For further details on Euler's theorem see references 1 to 3.
2.2.2 Thermodynamic Properties from Differentiation of Fundamental Equations
The quantities U = U (S, V, n1, n2, ···, xi), H = H (S, p, n1, n2, ···, xi), A = A(V, T, n1, n2, ···, xi), and G = G (p, T, n1, n2, ·· , xi) are examples of thermodynamic potentials from which all properties of a system can be obtained without the need for integration. For example, eq 2.10 gives directly the heat capacity at constant pressure
[MATHEMATICAL EXPRESSION NOT REPRODUCIBLE IN ASCII] (2.30)
and the isothermal compressibility
[MATHEMATICAL EXPRESSION NOT REPRODUCIBLE IN ASCII] (2.31)
Avoiding integration is often advantageous in theoretical applications of thermodynamics because there are no constants of integration. On the other hand, very often the derivatives needed involve variables that are difficult to measure experimentally. Even with the Gibbs function surface, which is closely linked to the convenient experimental variables of temperature, pressure and composition, differences in the Gibbs function can be studied only at equilibrium. At constant composition the characteristic functions U = U (S, V, n1, n2, ···, xi), H = H (S, p, n1, n2, ···, xi), A = A (V, T, n1, n2, ···, xi), and G = G (p, T, n1, n2, ···, xi) reduce to U = U (S, V), H = H (S, p), A = A (V, T) and G = G (p, T). By differentiation of these functions and use of eqs 2.5 and 2.19 to 2.21, the value of any thermodynamic property can be expressed in terms of the derivatives of each characteristic function. Table 2.2 summarizes the most relevant results. Further details can be found elsewhere.
2.3 Deviation Functions
Almost all definitions of molar properties for mixtures lack an unambiguous definition in the sense that they can be related directly to measurable properties. Therefore, it is common practice to compare an actual mixture property with its corresponding value obtained from an arbitrary model, for instance, an equation of state. This approach leads to the introduction of deviation functions. For a general mixture molar property Mm, the deviation function is defined by:
[MATHEMATICAL EXPRESSION NOT REPRODUCIBLE IN ASCII] (2.32)
An important aspect in this definition is the choice of the independent variables. Many analytical equations of state are expressions explicit in pressure: that is, temperature, molar volume (or density) and composition x = x1, x2, ···, xi are the natural independent variables. Therefore, eq 2.32 can be rewritten into:
[MATHEMATICAL EXPRESSION NOT REPRODUCIBLE IN ASCII] (2.33)
where n denotes the amounts n1, n2, ·· , ni. The value of M obtained from the model is evaluated at the same values of the independent variables as used for the mixture property. Alternatively, temperature, pressure and composition may be a suitable choice as independent variables for deviation functions, for example:
[MATHEMATICAL EXPRESSION NOT REPRODUCIBLE IN ASCII] (2.34)
In this case the value of M obtained from the model is evaluated at the same values of T, p and n as used for the actual mixture property. Both approaches are interrelated as follows:
[MATHEMATICAL EXPRESSION NOT REPRODUCIBLE IN ASCII] (2.35)
In this equation, pr is the reference pressure at which the molar volume of the mixture obtained from the model is equal to the molar volume of the actual mixture at the same temperature and composition as the mixture. A necessary feature of the model is that such a pr exists.
2.3.1 Residual Functions
As pointed out in the previous section, the calculation of deviation functions requires a choice of an appropriate model. If the model system is chosen to be an ideal gas mixture, which is an obvious choice for fluid mixtures, then the deviation functions are called residual functions. With temperature, volume and composition as independent variables eq 2.33 becomes:
[MATHEMATICAL EXPRESSION NOT REPRODUCIBLE IN ASCII] (2.36)
or with T and p as independent variables
[MATHEMATICAL EXPRESSION NOT REPRODUCIBLE IN ASCII] (2.37)
which is a particular form of eq 2.34. The two sets of residual functions are related by eq 2.35 in the form:
[MATHEMATICAL EXPRESSION NOT REPRODUCIBLE IN ASCII] (2.38)
where the reference pressure pr=RT/Vm is sufficiently low for the thermodynamic property M of the real fluid to have the ideal-gas value.
Some thermodynamic properties (U, H, CV and Cp) of an ideal gas are independent of pressure, while others like S, A and G are not. Consequently, from eq 2.37, it can be easily seen that the following equations hold:
UR(T, V, n) = UR(T, p, n), (2.39)
HR(T, V, n) = HR(T, p, n), (2.40)
CRV(T, V, n) = CRV(T, p, n), (2.41)
CRp(T, V, n) = CRp(T, p, n), (2.42)
[MATHEMATICAL EXPRESSION NOT REPRODUCIBLE IN ASCII] (2.43)
[MATHEMATICAL EXPRESSION NOT REPRODUCIBLE IN ASCII] (2.44)
and
[MATHEMATICAL EXPRESSION NOT REPRODUCIBLE IN ASCII] (2.45)
where Z=pV/nRT and is known as the compression or compressibility factor.
(Continues...)
Excerpted from Applied Thermodynamics of Fluids by A. R. H. Goodwin, J. V. Sengers, C. J. Peters. Copyright © 2010 International Union of Pure and Applied Chemistry. Excerpted by permission of The Royal Society of Chemistry.
All rights reserved. No part of this excerpt may be reproduced or reprinted without permission in writing from the publisher.
Excerpts are provided by Dial-A-Book Inc. solely for the personal use of visitors to this web site.
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in limited circumstances with your explicit written consent; and/or
where we need to carry out our legal obligations and in line with our policies; and/or
where it is needed in the public interest (such as for equal opportunities monitoring or in relation to our occupational pension scheme), and in line with our policies; and/or
where it is needed to assess your working capacity on health grounds, subject to appropriate confidentiality safeguards.
Less commonly, we may process this type of information where it is needed in relation to legal claims or where it is needed to protect your (or someone else’s) interests and you are not capable of giving your consent, or where you have already made the information public. We may also process such information about our people (or former people) in the course of our legitimate business activities with the appropriate safeguards.
The special categories of personal data may be used in the following ways:
in relation to leaves of absence, to comply with employment and other laws;
in relation to your physical or mental health, or disability status, to ensure your health and safety in the workplace and to assess your fitness to work, to monitor, manage and administer benefits and absences;
in relation to your race, national or ethnic origin, religious, philosophical or moral beliefs, or your sexual life or sexual orientation, to ensure meaningful equal opportunity monitoring and reporting.
DISCLOSURE:
Personal data may be transferred to service providers who support the operation of our business (such as payroll service providers), to other third parties reasonably necessary in the conduct of our business (including insurers, professional advisors, regulators). These third parties may be acting as processor, or controller of personal data in their own right.
In respect of all disclosures of personal data, we will only share the personal information which is necessary for the particular purpose for which it is provided, or where we have another legitimate interest in doing so, and we will ensure that the personal data is appropriately protected.
RETENTION PERIOD:
We will keep personal data only for as long as is necessary to fulfil the purposes for which we collected it, including for the purposes of satisfying any legal, accounting or reporting requirements. We will normally keep personal data of applicants who we do not employ for six months after we receive it.
We will keep personal data of employees throughout your employment and normally for a minimum of six years after your employment ends.
Changes to your personal data
It is very important that the personal information that we hold about you is accurate and current. Please tell us if your personal information changes during your relationship with us.
Data Security
We have put in place measures to prevent your personal data from being accidentally lost, used or accessed in an unauthorised way, altered or disclosed. In addition, we limit access to your personal data to those of our people and other third parties who have a business need to know. They will only process your personal data on our instructions and where they have agreed to treat the information confidentially and to keep it secure. We have put in place procedures to deal with any suspected data security breach and will notify you and the ICO of a suspected breach where we are legally required to do so.
Where we store your personal data
We principally store data, both electronically and on file, at our office.
Personal data may be transferred outside of the EEA by processors acting on our behalf. For transfers to countries not considered adequate by the EC, we will ensure that personal data is adequately protected, as required by the GDPR. This would include by use of the Standard Contractual Clauses adopted by the EC to protect personal data.
Your rights
Under certain circumstances, you have the right by law to request:
access to your personal data. This enables you to ask to receive a copy of the personal data that we hold about you and to check that we are lawfully processing it.
correction of the personal data that we hold about you.
erasure of your personal data.
object to processing of your personal data where we are relying on our legitimate interest and there is something about your particular situation which makes you want to object to processing on this ground. You also have the right to object where we are processing your personal information for direct marketing purposes.
restriction of processing of your personal data.
transfer of your personal data to another party.
Links from our website
Our website may, from time to time, contain links to and from the websites of third parties that we permit to make such links. If you follow a link to any of these websites, please note that these websites have their own privacy policies and that we do not accept any responsibility or liability for these policies. We recommend that you check these policies before you submit any personal data to these websites.
CHANGES TO THIS PRIVACY POLICY
Any changes we may make to our privacy policy in the future will be posted on our website, so please ensure that you are viewing the correct version.
Please contact us if you have any questions, comments or requests regarding this Privacy Policy.
Last amended May 2021.