- April, 1998, 8th International Conference on Phase Equilibria and Fluid Properties for Product and Process Design, Noordwijkerhout, The Netherlands
- Series of lectures, May 1998, 3rd International Symposium of the E. S. I. Q. I. E., Instituto Politecnio Nacional, Mexico City, Mexico
- March, 1997, Departments of Chemistry and Chemical Engineering, Brown University, Providence, RI
- June 1997, Department of Chemical Engineering, University of Cape Town, Cape Town, South Africa
- June 1997, Department of Chemistry, University of Natal, Durban, South Africa
- June 1997, South African Chemical Institute, Kwa Zulu-Natal Section, Durban, South Africa
- June 1997, Department of Chemical Engineering, University of Natal, Durban, South Africa
- August, 1997, School of Chemistry, Federal University of Rio de Janerio, Rio de Janerio, Brazil
- August, 1997, PETROBRAS Research Center, Rio de Janerio, Brazil
- August, 1997, Department of Chemical Engineering, Federal University of Bahia, Salvador, Brazil
- October, 1997, Technical Center, Union Carbide Corporation, S. Charleston, WV
- March 1996, Department of Chemical Engineering, University of New South Wales, Sydney, Australia
- April 1996, Department of Chemical Engineering, Monash University, Melbourne, Australia
- April 1996, Department of Chemical Engineering, University of Melbourne, Australia
- April 1996, Department of Chemical Engineering, University of Queensland, Brisbane, Australia
- August 1996, 14th IUPAC Conference on Chemical Thermodynamics, Osaka, Japan
- November 1996, Department of Chemical Engineering, McGill University, Montreal, Canada
- March, 1995, Department of Chemical and Biochemical Engineering, Rutgers University, New Jersey
- June 1995, 7th International Conference on Fluid Properties and Phase Equilibria for Chemical Process Design, Snowmass, Colorado
- July 1995, Separation Technology VI: Advances and Opportunities in Environmental Separations, Snowbird, Utah
- Lecture and two seminars, September and October, 1995, Department of Chemical Engineering, University of California, Berkeley, CA
- September 1995, K. C. Chao Retirement Symposium, Department of Chemical Engineering, Purdue University, West Lafayette, IN
- September 1995, DuPont Company, Wilmington, DE
- October 1995, Department of Chemical Engineering, University of California, Santa Barbara
- November 1995, Department of Chemical Engineering, University of Pittsburgh, Pittsburgh, PA
- January 1994, Department of Chemical and Nuclear Engineering, University of New Mexico, Albuquerque, NM
- February, 1994, Department of Chemical Engineering and Materials Science, University of Minnesota, MN
- April 1994, Verfahrenstechnik II, Technische Universität Hamburg-Harburg, Germany
- May 1994, Department of Chemical Engineering, Seoul National University, South Korea
- May 1994, Department of Chemical Engineering, Pohang Institute of Technology, South Korea
- November, 1994, Department of Chemistry and Biochemistry, University of Delaware, Newark, DE
- January 1993, Institut für Thermodynamik und Reaktiontechnik, Techische Universität Berlin, Germany
- March 1993, Department of Chemical Engineering, Texas A&M University, College Station, Texas
- March 1993, Department of Chemical Engineering, University of Maryland, College Park, MD
- March 1993, Department of Chemical Engineering, Oklahoma State University, Tulsa, Oklahoma
- April, 1992, Department of Chemical Engineering, City College of New York, New York
- April, 1992, Union Carbide Corporation Technical Center, S. Charleston, WV
- April, 1992, Air Products and Chemicals Co., Allentown, PA
- July, 1992, University of Lyon, Lyon, France
- July, 1992, 6th International Conference on Phase Equilibria and Fluid Properties in the Chemical Industry, Cortina d’Ampezzo, Italy
- August, 1992, ASEE Summer School for Chemical Engineering Faculty, Bozeman, Montana
- August, 1992, 12th IUPAC International Conference on Chemical Thermodynamics, Snowbird, Utah
- March, 1991, Department of Chemical Engineering, University of Notre Dame, Notre Dame, Indiana
- March, 1991, Department of Chemical Engineering, University of Connecticut, Storrs, CT
- April, 1991, 12th (European) Seminar on Applied Thermodynamics, Berlin, Germany
- May, 1991, Linde-KCA-Dresden GmbH, Dresden, Germany
- June, 1991, 11th Symposium on Thermophysical Properties, Boulder, CO
- August, 1991, Dow Chemical Company, Midland, MI
- October, 1991, American Petroleum Institute Refining Meeting, Kansas City, MO
- November, 1991, Mobil Research and Development Corporation, Princeton, NJ
- February, 1990, Department of Chemical Engineering, University of South Florida, Tampa, Florida
- February, 1990, Tieftemperature-Thermodynamik Kolloquium, Serfaus, Austria
- (two lectures at separate meetings), March, 1990, Mobil Research and Development Corporation, Paulsboro, NJ
- March, 1990, Union Carbide Corporation Technical Center, S. Charleston, WV
- April, 1990, Department of Chemical Engineering, Michigan State University, East Lansing, Michigan
- July, 1990, Instytut Chemii Fizycznej, Polish Academy of Sciences, Warsaw, Poland
- Series of four lectures, July, 1990, Institut für Thermodynamik und Reaktiontechnik, Technische Universitat Berlin, Berlin, West Germany
- September, 1990, Department of Chemical Engineering, North Carolina State University, Raleigh, North Carolina
- March, 1989, Department of Chemical Engineering, University of Queensland, Queensland, Australia
- May, 1989, Shell Laboratories, Amsterdam, The Netherlands
- June, 1989, Institute du Petrole Francaise, Rueil, Malmaison, France
- series of lectures, June, 1989, Institut fur Thermodynamik und Reactiontechnik, Technische Universitat Berlin (West), Berlin, West Germany
- July, 1989, Department of Physics, Technische Universitat Berlin (West), Berlin, West Germany
- August, 1989, Department of Chemical Engineering, Technical University of Budapest, Budapest, Hungary
- January, 1988, Department of Chemical Engineering, University of California – Los Angeles, Los Angeles, CA
- October, 1988, Aspenworld 88 Conference, Amsterdam, The Netherlands
- October, 1988, Department of Chemical Engineering, Ohio State University, Ohio
- October, 1988, Department of Chemical Engineering, University of Washington, Seattle, WA
- November, 1988, Department of Chemical Engineering, University of Florida, Gainesville, FL
- December, 1988, Fachgebiet Thermodynamik, Gesamthochschule Duisberg, West Germany
- October, 1987, Department of Chemical Engineering, University of Akron, Akron, Ohio
- January and March, 1986, Mobil Research and Development Corporation, Princeton, New Jersey
- January, 1986, Mobil Research and Development Corporation, Dallas, Texas
- August, 1986, Union Carbide Corporation Technical Center, S. Charleston, West Virginia
- November, 1986, Chevron Oil Field Research Company, La Habra, CA
- December, 1986, Department of Chemical Engineering, The Polytechnic Institute of New York, New York
- March, 1985, Department of Chemical Engineering, Massachusetts Institute of Technology, Cambridge, MA
- May, 1985, American Chemical Society Symposium on Equations of State, Miami Beach, Florida
- June, 1985, Ninth Symposium on Thermophysical Properties, Boulder, Colorado
- July, 1985, Departmento Ingenieria Quimica, Universidad Nacional Del Sur and Planta Piloto de Ingenieria Quimica (PLAPIQUI), Bahia Blanca, Argentina
- August, 1985, Instituto de Desarrollo Techologico Para La Industria Quimica (INTEC), Santa Fe, Argentina
- August, 1985, Instituto Petroquimico Argentina (IPA), Buenos Aires, Argentina
- September, 1985, IUPAC/CODATA Meeting, Paris, France
- October, 1985, Instituto Superior Technico, University of Lisbon, Lisbon, Portugal
- October, 1985, Department of Chemical Engineering, University of Texas, Austin, Texas
- October, 1985, Department of Chemical Engineering, The Pennsylvania State University, State College, Pennsylvania
- November, 1985, Professional Progress Award Lecture, 1985 National Meeting of the American Institute of Chemical Engineers, Chicago, Illinois
- March, 1984, Department of Chemical Engineering, University of Massachusetts, Amherst, MA
- April, 1984, Department of Chemical Engineering, University of Washington, Seattle, WA
- April, 1984, Department of Chemical Engineering, University of Virginia, Charlottesville, VA
- April, 1984, Department of Chemical Engineering, Virginia Polytechnic Institute and State University, Blacksburg, VA
- September, 1984, Department of Chemical Engineering, Brigham Young University, Salt Lake City, Utah
- December, 1984, Department of Chemical Engineering, University of California, Berkeley, CA
- August, 1983, Union Carbide Corporation, Technical Center, S. Charleston, West Virginia
- October, 1983, ARCO Chemical Company, Newtown Square, Pennsylvania
- January, 1982, Departmento Ingenieria Quimica, Universidad Autonoma Metropolitana-Ixtapalapa, Mexico City, Mexico
- January, 1982, Instituto Mexicano del Petroleo, Mexico City, Mexico
- March, 1982, University of Delaware Chapter, Sigma Xi, Newark, DE
- May, 1982, University of Delaware, Undergraduate Honors Program, Newark, DE
- August, 1982, ASEE Summer School for Chemical Engineering Faculty, Santa Barbara, California
- August, 1982, Undergraduate Honors Program and Honor Societies Lecture, University of Delaware, Newark, DE
- September, 1982, Joint Meeting of the CIESC-AIChE, Beijing, China
- November, 1982, Department of Chemical Engineering, Lehigh University, Bethlehem, PA
- December, 1982, International Seminar of Chemical Engineering Education, Research & Training in Developing Countries, Calcutta, India
- February, 1981, Fachgebiet Thermodynamik, Gesamthochschule, Duisburg, West Germany
- February, 1981, Institut fur Thermo-und Fluiddynamik, Ruhr-Universitat, Bochum, West Germany
- Series of five lectures, February – June, 1981, Institut fur Thermodynamik und Anlagentechnik, Technische Universitat Berlin, Berlin, West Germany
- March, 1981, Iwan N. Stranski-Institut fur Physikalische und Theoretische Chemie, Technische Universitat Berlin, Berlin, West Germany
- March, 1981, Tieftemperatur-Technik-Kolloquium of the Technische, Universitat Berlin (West), Obertauern, Austria
- Series of three lectures, April, 1981, Wolfson Department of Chemical Engineering, The Technion-Israel Institute of Technology, Haifa, Israel
- April, 1981, Linde Weksgruppe TVT, Munich, West Germany
- May, 1981, The Chemical Center, University of Lund, Lund, Sweden
- May, 1981, Institut fur Physikalische Chemie und Elektrochemie, Universitat Karlsruhe, Karlsruhe, West Germany
- May, 1981, BASF Aktiengesellschaft, Ludwigshafen, West Germany
- May, 1981, Institut fur Technische Thermodynamik, Universitat Kaiserslautern, Kaiserslautern, West Germany
- June, 1981, Institut fur Technische Chemie, Universitat Erlangen-Nurberg, West Germany
- June, 1981, Institut fur Technische Thermodynamik und Technische Verfahrenstechnik, Universitat Stuttgart, Stuttgart, West Germany
- July, 1981, Lehrstuhl fur Chemie, Universitat Regensburg, Regensburg, West Germany
- October, 1981, Department of Chemical Engineering, Cornell University, Ithaca, NY
- November, 1981, Department of Chemical Engineering, Princeton University, Princeton, NJ
- March, 1980, International Conference on Phase Equilibria and Fluid Properties in the Chemical Industry, Berlin, West Germany
- June, 1980, Technical Center, Union Carbide Corporation, S. Charleston, WV
- July, 1980, Engineering Foundation Conference on the Foundations of Computer-Aided Chemical Process Design, Henniker, New Hampshire
- December, 1980, Department of Chemical Engineering, University of Rochester, Rochester, NY
- December, 1980, Chevron Oil Field Research Corporation, La Habra, California
- December, 1980, Tau Beta Pi, Delaware Alpha Chapter International Banquet, Delaware
- January, 1979, Institute of Physical Chemistry, Polish Academy of Sciences, Warsaw, Poland
- March, 1979, Department of Chemical Engineering, University of Illinois, Chicago, IL
- October, 1979, Department of Chemical Engineering, Carnegie-Mellon University, Pittsburgh, PA
- October, 1979, Department of Chemical and Petroleum Engineering, University of Pittsburgh, Pittsburgh, PA
- November, 1979, Department of Chemical Engineering, The Johns Hopkins University, Baltimore, MD
- April, 1978, Department of Chemical and Biochemical Engineering, University of Pennsylvania, Philadelphia, PA
- April, 1978, Department of Chemical Engineering, North Carolina State University, Raleigh, NC
- September, 1978, National Physical Laboratory Conference Chemical Thermodynamic Data on Fluids and Fluid Mixtures, Teddington, England
- “Structure and Motion of Liquids”, Faraday Society Discussion No. 66, September, 1978, University of Kent at Canterbury, Canterbury, England
- November, 1978, Department of Chemical Engineering, Purdue University, West Lafayette, IN
- November, 1978, Department of Chemical Engineering, University of Minnesota, Twin Cities, Minnesota
- December, 1978, 40th Statistical Mechanics Meeting, Rutgers University, Piscataway, NJ
- April, 1977, National Bureau of Standards Meeting on the Estimation of the Properties of Fluid Mixtures, Gaithersburg, Maryland
- October, 1977, Department of Chemical Engineering, Columbia University, New York, NY
- May, 1976, Mechanical and Aerospace Engineering Department, University of Delaware, Newark, DE
- January, 1975, Chemistry Division, Oak Ridge National Laboratory, Oak Ridge, TN
- March, 1975, Department of Chemical Engineering, Rice University, Houston, TX
- March, 1975, Department of Chemical Engineering, University of Houston, Houston, TX
- September, 1975, Chemistry Department, University of Delaware, Newark, DE
- January, 1974, Laboratoire de Physique Theoretique des Liquides, Universite Paris VI, Paris, France
- April, 1974, Physics Department, University of Surrey at Guilford, Surrey, England
- May, 1974, Department of Chemistry and Chemical Engineering and Chemical Technology, Imperial College of Science and Technology, London, England
- May, 1974, Theoretical Physics Department, University of Newcastle Upon Tyne, Newcastle, United Kingdom
- December, 1974, Department of Chemical Engineering, State University of New York at Buffalo, Buffalo, NY
- November, 1972, Department of Chemical Engineering, University of Pennsylvania, Philadelphia, PA
- January, 1973, Boltzmann Centennial Seminar, Brown University, Providence, RI
- December, 1973, Materials Physics Division, Atomic Energy Research Establishment, Harwell, England
- April, 1972, Department of Chemical Engineering, City College of New York, New York
- April, 1970, Department of Chemical Engineering, University of Florida, Gainesville, FL
- February, 1967, Department of Chemical Engineering, The Johns Hopkins University, Baltimore, MD
- March, 1967, Department of Chemical Engineering, University of Delaware, Newark, DE
- March, 1966, Department of Chemical Engineering, University of California, Davis, Davis, California