Ray, W. Harmon

Ogunnaike, B. A. and W. Harmon Ray. Process Dynamics, Modeling, and Control. Oxford University Press (1994).
Ray, W.H. Advanced Process Control. McGraw-Hill, 400 pp. (1980). Reprinted in paperback by Butterworths, 1989. Also translated and published in Russian and in Chinese.
Ray, W.H. and J. Szekely. Process Optimization - with Applications in Metallurgy and Chemical Engineering. John Wiley and Sons, 400 pp. (1973)

Selected Publications

Lo, Dennis P. and W. H. Ray. “Kinetic Modeling and Prediction of Polymer Properties for Ethylene Polymerization over Nickel-Diimine Catalysts”. I&EC Research, 44, 5932-5949 (2005)
Wells, G. J. and W. H. Ray. “Mixing Effects on Performance and Stability of Low-density Polyethylene Reactors ”. AIChE Journal, 51, 3205-3218, (2005)
Banaszak, Brian, D. P. Lo, T. Widya, W. H. Ray, J. J. de Pablo, A. Novak, and Juraj Kosek, “Ethylene and 1-Hexene Sorption in LLDPE under Typical Gas Phase Reactor Conditions: A priori Simulation and Modeling for Prediction of Experimental Observations”, Macromolecules, 37, 9139-9150 (2004)
Zhang, M. and W. H. Ray. “Modeling of “Living” Free-Radical Polymerization Processes. I. Batch, Semi batch, and Continuous Tank Reactors”. Journal of Applied Polymer Science, 86, 1630-1662 (2002).
Yao, Zhen and W. H. Ray. “Modeling and Analysis of New Processes for Polyester and Nylon Production”. AIChE Journal, 47, 401-412 (2001).
Beers, Kenneth C. and W. H. Ray. “A Linkage Moment Approach to Modeling Condensation Polymerization with Multiple Monomers. I. Linear Polymers”. Journal of Applied Polymer Science, 79, 246-265 (2001).
Villa, Carlos M. and W. H. Ray. “Nonlinear Dynamics Found in Polymerization Processes – A Review”. Chemical Engineering Science, 55, 2, 275-290 (1999).
Mallon, Frederick K. and W. H. Ray. “Modeling of Solid-State Polycondensation. II. Reactor Design Issues”. Journal of Applied Polymer Science, 69, 1775-1788(1998).
Shaffer, W. K. A. and W. H. Ray. “Polymerization of Olefins Through Heterogeneous Catalysis. XVIII. A Kinetic Explanation for Unusual Effects”. Journal of Applied Polymer Science, 65, 1053-1080 (1997)
Debling, J. A., J. J. Zacca and W. H. Ray. “Reactor Residence-Time Distribution Effects on the Multistage Polymerization of Olefins. Part III. Multi-layered Products - Impact Polypropylene”. Chemical Engineering Science, 52, 12, 1969-2001 (1997).
Hyanek, I., J. Zacca, F. Teymour, and W. H. Ray. “Dynamics and Stability of Polymerization Process Flow Sheets”. I&EC Research, 34, 11, 3872-3877 (1995)
Semino, Daniele and W. H. Ray. “Control of Systems Described by Population Balance Equations - II. Emulsion Polymerization with Constrained Control Action”. Chemical Engineering Science, 50, 11, 1825-1839 (1995)
Gay, David H. and W. H. Ray. “Identification and Control of Distributed Parameter Systems by Means of the Singular Value Decomposition”. Chemical Engineering Science, 50, 10, 1519-1539 (1995)
Paquet, D. A., Jr. and W. H. Ray. “Tubular Reactors for Emulsion Polymerization: I. Experimental Investigation”. AIChE Journal, 40, 1, 73-87 (1994)
Scott, G. M. and W. H. Ray. “Experiences with Model-Based Controllers Based on Neural Network Process Models”. J. Proc. Cont. 3, 3 179-196 (1993)
Jacobsen, L. L. and W. H. Ray. “Unified Modeling for Polycondensation Kinetics”. J. Macromolecular Science Reviews in Macromolecular Chemistry and Physics, C32 (3 & 4), 407-519 (1992).
Jerome, N. F. and W. H. Ray. "Model-Predictive Control of Linear Multivariable Systems Having Time Delays and Right-Half-Plane Zeros." Chemical Engineering Science, 47, 4, 763-785 (1992)
Hutchinson, R. A. and W. H. Ray. "Polymerization of Olefins through Heterogeneous Catalysis. VIII. Monomer Sorption Effects". J. of Applied Polymer Sci., Vol. 41, 51-81 (1990)
Stevens, C. J. and W. H. Ray. "The Mathematical Modeling of Bulk and Solution Polymerization in a Tubular Reactor". ACS Symposium Series No. 404; Computer Applications in Applied Polymer Science II: Automation, Modeling, and Simulation, Chapter 28. American Chemical Society (1989)
Rawlings, J.B. and W.H. Ray. "Emulsion Polymerization Reactor Stability:Simplified Model Analysis." AIChE J., 33, l663-l677 (l987).
Hutchinson, R.A. and W.H. Ray. "Polymerization of Olefins Through Heterogeneous Catalysis. VII. Particle Ignition and Extinction Phenomena." J. Appl. Poly. Sci., 34, 657-676 (l987)
Choi, K.-Y. and W.H. Ray. "The Dynamic Behavior of Fluidized Bed Reactors for Solid Catalysed Gas Phase Olefin Polymerization." Chem. Eng. Sci., 40, 2261 (1985)
Schork, F.J and W.H. Ray. "On-line Measurement of Surface Tension and Density with Applications to Emulsion Polymerization." J. Appl. Poly. Sci., 28, 407 (1983)
Jensen, K.F. and W.H. Ray. "The Bifurcation Behavior of Tubular Reactors." Chem. Eng. Sci., 37, 199 (1982)
Ogunnaike, B.A. and W.H. Ray. "Computer-aided Multivariable Control System Design for Processes with Time Delays." Computers and Chem. Eng., 6, 311 (1982)
Greiss, F.K. and W.H. Ray. "State Estimation and Feedback Control of Process having Moving Boundaries - An Experimental Study." Proceedings 1979 Joint Automatic Control Conference (June 1979). Also published in Automatica, 16, 157 (1980)
Lausterer, G.K., W.H. Ray and H.R. Martens. "The Real Time Application of Distributed Parameter State Estimation Theory to a Two Dimensional Heated Ingot." Proceedings 2nd IFAC Symposium on Distributed Parameter Control Systems, Coventry, England (June 1977); Also Automatica, 14, 335 (1978).
Uppal, A., W.H. Ray and A.B. Poore. "The Classification of the Dynamic Behavior of Continuous Stirred Tank Reactors - Influence of Reactor Residence Time." Chemical Engineering Science, 31, 205 (1976)
Uppal, A., W.H. Ray and A. Poore. "On the Dynamic Behavior of Continuous Stirred Tank Reactors." Chem. Eng. Sci., 29, 967 (1974)
Ajinkya, M.B., M. Köhne, H.F. Mäder and W.H. Ray. "The Experimental Implementation of a Distributed Parameter Filter." Automatica, 11, 571 (1975)
Min, K.W. and W.H. Ray. "On the Mathematical Modelling of Emulsion Polymerization Reactors." J. Macro. Sci-Revs. Macro. Chem., C11, 177 (1974)
Ray, W.H. "On the Mathematical Modelling of Polymerization Reactors." J. Macromol. Sci.-Revs. Macromol. Chem., C8, 1-56 (1972)
Soliman, M.A. and W.H. Ray. "Optimal Feedback Control for Linear-quadratic Systems Having Time Delay." Int. J. Control, 15, 609-627 (1972)
Ogunye, A.F. and W.H. Ray. "The Optimization of Cyclic Tubular Reactors with Catalyst Decay." IEC Proc. Des. Dev., 10, 410-416 (1971)
Ray, W.H. "Periodic Operation of Polymerization Reactors." IEC Proc.Des. Dev., 7, 422-426 (1968)

Selected Awards, Honors and Societies

J. Simon Guggenheim Memorial Fellowship (1973-74)
Arthur K. Doolittle Award, Organics Coatings and Plastics Division of the American Chemical Society (1981)
Automatica Prize Paper Award, International Federation of Automatic Control (1981)
Professional Progress Award, AIChE (1982)
Education Award, American Automatic Control Council (1989)
Elected to the National Academy of Engineering (1991)
Bellman Control Heritage Award, American Automatic Control Council (2000)
DSc (honoris causa) University of Minnesota (2001)
DEng (honoris causa), University of Waterloo, Canada, (2003)
Gerhard Damköhler Medaille, DECHEMA/GVC, Germany (2006)

Summary

My current research interests are in the area of chemical reaction engineering with an emphasis on polymerization processes. These interests also extend to the monitoring, dynamics, and control of chemical processes. Current activities include some research, writing, teaching, and consulting.

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Date last modified: 02-Nov-2006
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