PREFACE
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THE EQUATION-OF-STATE APPROACH to model and correlate fluid-phase equilibria has been emphasized more and more in the eight years since the first symposium on this topic. In 1979, we edited the volume entitled Equations of State in Engineering and Research (Advances in Chemistry No. 182), which was based on that symposium. Meanwhile, research activities have been continually robust, particularly in building new models and in extending established equations for new and improved applications. The present volume is based on the April 1985 equation-of-state symposium held to present a comprehensive state-of-the-art view of progress in this area. The term "equation of state" is used in a broad sense to include mathematical description of volumetric behavior, derived properties, mixture behavior, and phase equilibrium of fluids. The main thrust continues to be the description of fluid-phase equilibrium, a phenomenon of enduring interest because it is basic to mass transport and separation operations. At the present stage of development, nonpolar fluids are modeled almost exclusively with equations of state, and active research is extending to polar fluids. The twenty-eight chapters in this volume, reporting work and progress on a broad front, are arranged in seven sections. Contributions are made by authors from diverse disciplines, including chemical engineers, physical chemists, and chemical physicists. The division of the volume into sections is not rigorous; some papers can fit easily into more than one section. Nevertheless, the arrangement should serve as a helpful guide to readers in their initial encounter with this substantial collection. We greatly appreciate the encouragement and support of the Division of Industrial and Engineering Chemistry of the American Chemical Society in sponsoring the symposium. Special thanks go to the authors of the papers. In addition to the regular task of preparing their manuscripts, they have gone the extra mile by preparing them in a camera-ready form. Their care and devotion are clear from the quality of the finished product. Robin Giroux of the ACS Books Department worked with us throughout the development of the volume.
K. C. CHAO
ROBERT L. ROBINSON, JR.
School of Chemical Engineering Purdue University West Lafayette, IN 47907
School of Chemical Engineering Oklahoma State University Stillwater, OK 74078 December 2, 1985 ix
Chao and Robinson; Equations of State ACS Symposium Series; American Chemical Society: Washington, DC, 1986.
