but practical computational methods and further study of interactions with physical processes, such as mixing and transport, are still required. Much has been learned in the past several years about the operating behavior and transport in fluidized beds, and applications with reactions now need to be considered-this could lead to more extensive use for more different processes than at present. Much effort has gone into the development of optimization theory and principles. The present need is to concentrate on practical applications to realize the full potential of the most important methods. T h e session on catalytic reactions emphasized the possible physical interactions which can cause problems in the study and application of catalytic kinetics and need to be carefully evaluated. For two-phase reactors, the main problem again is in the physical contacting of the phases, which can cause widely varying results, especially with the complex reactions; this fact leads to the use of unique reactor types which are often difficult to analyze and design. Catalyst deactivation has only recently been extensively studied rigorously, and there is still a need for information on basic kinetics, the effects on reactor operation, and optimization studies to assess the importance and handling of the problem. Industrial process kinetics contain many of the above problems since the work must often be done in complicated reactors. I n addition, the problem of parameter estimation is very complex in its own right, but from statistical measurement variations and calculation methods. The basic idea of reaction/reactor stability is not difficult, but application in detail to real systems in a simple and workable fashion often is not so evident. The field of biochemical reaction engineering is relatively new, and was considered here for the first time in this type of symposium. We are beginning to grasp some of the essential difficulties of the quantitative kinetics and are using them for more rational reactor design.
In Appreciation . .
.
Joe Stewart devoted a major portion of his professional society activities to the Industrial and Engineering Chemistry Division. Early in his career, he worked his way through the “chairs,” serving in such capacities as secretary, treasurer, and division chairman. After his service as Chairman of the Division, he continued his activities serving as Councilor for many years. He never lost his desire to work in the I&EC Division and was always available for any special committee or task that was needed. Most recently, he served as a member of the special Ad Hoc Committee on INDUSTRIAL AND ENGINEERING CHEMISTRY. At the time of his death, he was still a key executive in the Division serving, in addition to Councilor, as Chairman of the Nominating Committee. I n fact, in his last full day of professional life, he spent hours in this capacity, combing the profession to develop the strongest possible slate of candidates for the upcoming Division election. There are no honors to be awarded or accolades to be paid that can truly indicate his years of loyal and devoted service. He was recipient of the Division Scroll of Honor-the highest award for service in the I&EC Division. Therefore, it seems most fitting that this issue in the final months of publication of INDUSTRIAL AND ENGINEERING CHEMISTRY should be published in memory of Joe Stewart-a sincere, loyal, effective, and devoted worker in the Industrial and Engineering Chemistry Division of the American Chemical Society.
Chairman I H E C Division VOL. 6 2
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First International Symposium on Chemical Reaction Engineering
U. Onken, an author, Farbwerke Hoechst, AG, Germary, and one of the participants, at the registratzon desk with M r s . Bonnie M'atkins, Executive Secretary of the Svmposzunt. Scene was the reception hall of the Carnegie Institution
J . M . Matsen, Esso Research,
N. J .
Left, G. F . Froment, University of Ghent; right, two of the authors, R. W . Coughlin, Lehigh Unioersity, and second from right, R. L. Kabel, Penn State UniL'ersity
From left to right, G. F . Froment, Uniuersity of Ghent, Chairman of the 4th European Symposium on Chemical Reaction Engineering, 1968; D . Thoenes, Twente Uni-
oersi& of Technology, Enschede, Netherlands, Chairman of the 2nd International-5th European Symposium (7972) on C R E ; K . B. Bischoff, Chairman, 1st I S C R E , and M r s . Bischoff; J . G. van de Vitsse, Shell Laboratorium,
and a member of the organizing committee, and iMrs. van de Vusse 8
I N D U S T R I A L A N D E N G I N E E R I N G CHEMISTRY
One attendee thoughtfully putting down a note at coffee break time
Second from right, C. van Heerden, Dutch State Mines, Geleen, a member of the Organizing Committee of the Symposium, talking with a friend in the rotunda of the Carnegie Institution
View through the receftion rooms at the Department of State
First International Symposium on Chemical Reaction Engineering
L e f t , W . R. Brode, immediate Past-President of ACS, and L. G. M g j i e l d , hTational Science Foundation, speaking together at the reception
J@gen Henningsen, Assistant Professor from Technical UniversiQ of Denmark
F. T . W a l l , Executine Director, A C S , and K . B. Bischoff
Usual order, R. M . Salinger, D a w Cornin& V. A . Fauuer, D o w Chemical; D. M . H. Bowen, Managing Editor, Environmental Science 3 Technology; and J . H. S. Haggin, C 3 E h ' staff writer (back to camera)
C. 0. Bennett (left), University of Connecticut, and J . B. Butt, Northwestern University, a Reviewer
V. W. Weekman (left), Mobil R@D and member of the Program Committee, and E. Wicke, Munster University, Germany, one of the Reviewers
R. L. K e q o n , Director of Publications, ACS, talking with R. G. Gould, Group Manager, Books, ACS, and Mrs. Gould
Facing camera left to right, V. H. Edwards, Cornell University, an author; University of Waterloo; and L. E. Erickson, Kansas State University Left, P. N. Rowe, and to his left, J . G. Yates. Both men are from University College, London. Rowe served as a session Chairman and co-author with Yates
Milos Marek,
Forefront left, H. M . Hulbert, Northwestern University, one of the session Chairmen
Stephen Szepe, University of Illinois at Chicago Circle, and right, S. G . Bankof, Northwestern University, both authors VOL. 6 2
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