Dr. Ahmed H. Tobgy received his B.Sc., with Distinction and Honors, and his M.Sc. in Chemical Engineering from Cairo University, Egypt. He earned his Ph.D. in Chemical Engineering from Exeter University, UK. He taught in the Chemical Engineering Departments of several universities. and was an Honorary Research Fellow at Exeter University. He specializes in chemical reaction engineering and simulation with particular reference to mixing, direct reduction of iron ores and leaching of copper ores. He is a Senior Member of the AIChE, Senior Member of the ACS, Member of the Egyptian Association of Engineering Professions, and Member of the Jordan Engineers Association. He has a broad academic experience in teaching, research and in teaching the use of computer packages, libraries and programs of particular relevance to chemical engineers.
· B.Sc., Chemical Engineering, Cairo University, Egypt, 1960.
· M.Sc., Chemical Engineering, Cairo University, Egypt, 1964;
Thesis Title: Reduction of Egyptian Iron Ores in the Fluidized State
· Ph.D., Chemical Engineering, Exeter University, UK, 1977;
Thesis Title: Modelling of Unpremixed Feed Reactors Using Residence Time Information
· American Institute of Chemical Engineers
· American Chemical Society
· Egyptian Association of Engineering Professions
· Jordan Engineers Association
Military Factory No. 18, Abou-Zaabal (Egypt): Summer 1958. Training in Unit Processes and Operations related to Explosives Manufacture and Extraction of Essential Oils by Steam Distillation.
VÖEST, Linz (Austria): Summer 1959. Training in the Blast Furnace, Slag Wool, and Steel sections and in the production of Coke and By-Product Chemicals.
Alexandria University (Egypt): Demonstrator of Chemical Engineering, 1960-61. Assisted in teaching laboratory and recitation sections in various courses.
Cairo University (Egypt): Demonstrator of Chemical Engineering, 1960-64. Assisted in the teaching of different courses and simultaneously engaged in a research on "Reduction of Egyptian Iron Ores in the Fluidized State", leading to an M.Sc. degree.
Azzel Co. Ltd., Dokki, Cairo (Egypt): Partner, 1960-64. Participated in all phases of design calculations, equipment sizing and selection, installation, starting-up, etc., through commercial operation of units for the manufacture of Slag Wool, Phenol-Formaldehyde Resin and Air-Blown Bitumen.
London University (England): Research, 1964-66. Conducted research on "Residence Time Distribution in Unpacked Tubes and the Effect of Various Pipe Fittings on it" at University College, and attended various post-graduate courses and seminars at both the University College and the Imperial College of Science and Technology.
Exeter University (England): Research and Teaching, 1966-77. Conducted research on various topics related to the development of methodologies for the characterization, optimization, and modelling of mixing effects on the performance of chemical reactors; Engaged on a limited scale in undergraduate and postgraduate instruction in the fields of Chemical Reaction Engineering and the Application of Statistical and Computer Techniques in Chemical Engineering.
University of Jordan (Jordan) 1977 - Present:
Engaged in Teaching, Research, and Serving the University, Profession and Community.
Examples of Services to The University of Jordan, Profession and Community
Undertook mainly in 1977-79, with another faculty member and two academic consultants appointed by the University, the special task of academic and laboratory planning for establishing a new Chemical Engineering Department. Undergraduate instruction started in the Department in October 1978 and the first batch of students graduated in June 1982. The task included devising a contemporary curriculum which takes into account the state of development of Jordan, designing the Chemical Engineering Laboratories, and preparing lists of needed equipment.
Prepared requests for financial and technical aid, submitted in 1979 to both the Federal Republic of Germany and the European Economic Community, for establishing the new Faculty of Engineering & Technology (F.E.T).
Prepared in 1980-81 for the visits to the F.E.T. by the American Professors Accreditation Committee.
Prepared in 1981 the proposals for the Second Phase of E.E.C. Grant for starting graduate studies in Chemical Engineering Department, establishing Graduate Studies Engineering Library, and improving the Audio-Visual Aids Center.
Prepared the five years 1981/86 Chemical Engineering Department recruitment plan for faculty members, Teaching/ Research Assistants, Laboratory Engineers, and Technicians.
Prepared documents for the supply of Phase I Laboratory Equipment for the Chemical Engineering Department, and followed-up the delivery and commissioning of the equipment.
Ordered a large number of Chemical Engineering Books, Journals, and Audio-Courses, in order to improve the University resources.
Prepared and submitted to the E.E.C. Specialist (Dr. D. Jennings) a list of the digital computer software requirements for the Chemical Engineering Department.
Attended several important meeting, 1977-present, at the invitation of the Dean of the F.E.T. to participate in discussing and/or formulating plans pertaining to the development of the F.E.T. and the Chemical Engineering Department.
Participated in organizing and attended several University of Jordan sponsored Annual Festivals, Workshops and Seminars.
Acted as an active member of the Organization and Scientific Committees of the First International Chemical Engineering Conference, University of Jordan 2001.
Served several times, since 1979, as a member of the Ministry of Industry & Trade and University of Jordan Specifications and Standardization Committees.
Consulted by the Ministry of Higher Education and the Jordan Engineering Association on the Academic qualification of several engineers who got their undergraduate and/or graduate degrees from abroad.
Acted as the Academic Advisor of several hundred Undergraduate and Graduate Students.
Reviewed many Manuscripts submitted for publication in International and Local Journals.
Reviewed several research proposals submitted to some Arab Universities.
By appointment of the Ministry of Higher Education and Research, acted as the Chairman of the Accreditation Requirements Committee, of Private (non- Governmental) Chemical Engineering Departments.
Acted as a Member or Chairman of Chemical Engineering Departmental/University Committees to prepare the Self- Study report and other requirements for the Assessment/ Accreditation of the Department by the QAA and the ABET organizations
Acted several times as a Member or Chairman of many University, Faculty or Department level Committees.
Acted twice as the Assistant Dean for Computer Affairs, Faculty of Engineering and Technology.
Advisor and Responsible Staff Member/Contact Person for software of particular importance to chemical engineers:
- Numerical Algorithms Group – NAG FORTRAN Numerical Library, and NAG Toolbox for MATLAB.
- Aspen Technology, Inc. – Aspentech HYSYS software, and Aspen University Package for Process Engineering.
- Honeywell, Inc. – UniSim Design Process Simulation Software package.
Selected Books that Cite the Publications of Dr. A. H. Tobgy
1. Levenspiel, O., Chemical Reaction Engineering, 2nd Ed., Wiley, 1972.
2. Rodrigues, A. E., Carlo, J. M., and Sweed, N. H. (Editors), Multiphase Chemical Reactors. Volume 1 - Fundamentals, Sijthoff & Noordhoff, 1981.
3. Mann, R., Gas-Liquid Contacting in Mixing Vessels, The Institution of Chemical Engineers, 1983.
4. Nauman, E. B., and Buffham, B. A., Mixing in Continuous Flow Systems, Wiley, 1983.
5. Westerterp, K. R., van Swaaij, W. P. M., and Beenackers, A. A. C. M., Chemical Reactor Design and Operation, Wiley, 1984.
6. Bisio, A., and Kabal, R. L., Scaleup of Chemical Processes: Conversion from Laboratory Scale Tests to Successful Commercial Size Design, Wiley, 1985.
7. de Lasa, H. I. (Editor), Chemical Reactor Design and Technology, Sijthoff & Noordhoff, 1985.
8. Cheremisinoff, N. P. (Editor), Encyclopedia of Fluid Mechanics. Volume 1: Flow Phenomena and Measurement, Gulf Pub. Co., 1986.
9. Cheremisinoff, N. P. (Editor), Encyclopedia of Fluid Mechanics. Volume 2: Dynamics of Single Fluid Flows and Mixing, Gulf Pub. Co., 1986.
10. Tavare, N. S., Industrial Crystallization: Process Simulation, Analysis, and Design, Plenum Press, 1995.
11. Bałdyga, J., and Bourne, J. R., Turbulent Mixing and Chemical Reactions, Wiley, 1999.
12. Doraiswamy, L. K., Organic Synthesis Engineering, Oxford University Press, 2001.
13. Jones, A. G., Crystallization Process Systems, Butterworth-Heinemann, 2002.
14. Ranade, V. V., Computational Flow Modeling for Chemical Reactor Engineering, Academic Press, 2002.
15. Fox, R. O., Computational Models for Turbulent Reacting Flows, Cambridge University Press, 2003.
Christensen, D., Nijenhuis, J., van Ommen, Jr, and Coppens, M-O (2008). Residence times in fluidized beds with secondary gas injection. Powder Technology, 180: 321-331.
Buffham, B. A., Nauman, E. B. (2004). Extremes of conversion in continuous-flow reactors. Chemical Engineering Science, 59(14): 2831-2839.
Michioka, T., Komori, S (2004). Large-eddy simulation of a turbulent reacting liquid flow. AIChE Journal, 50(11): 2705-2720.
Alkhaddar, R. M., Higgins, P. R., Phipps, D. A., and Ryg, O. H. (2002). The experimental and residence time distribution estimation of the decomposition of hydrogen peroxide within hydrodynamic vortex separator. 9th International Conference on Urban Drainage, Portland, Oregon, USA, 8-13 Sep 2002.
Chatterjee, A., and Ghosh, T. (2002). The fast reaction asymptote of the coalescence-redispersion model. Chemical Engineering Communications, 189(7): 985-994.
Venneker, B. C. H., Derksen, J. J., and van den Akker, H. E. A. (2002). Population balance modeling of aerated stirred vessels based on CFD. AIChE Journal, 48(4): 673-685.
Zauner, R., and Jones, A. G. (2002). On the influence of mixing on crystal precipitation processes - application of the segregated feed model. Chemical Engineering Science, 57(5): 821-831.
Fang, J. Z., and Lee, D. J. (2001). Micromixing efficiency in static mixer. Chemical Engineering Science, 56(12): 3797-3802
Ehlers, S. T., Elgeti, K., Menzel, T., and Wiessmeier, G. (2000). Mixing in the offstream of a microchannel system. Chemical Engineering and Processing, 39: 291-298.
Kaminskii, V. A., and Rabinovich, A. B. (2000). Closures in the moment method for modeling complex chemical reactions in turbulent flows. Theoretical Foundations of Chemical Engineering, 34(2): 172-179.
Tavare, N. S. (2000). Mixing, reaction and precipitation: an interplay in continuous crystallizers with unpremixed feeds. European Conference on Mixing, Proceedings of the European Conference, 10th, Delft, Netherlands, July 2-5, 2000: 395-405.
Barresi, A. A., Marchisio, D., and Baldi, G. (1999). On the role of micro- and mesomixing in a continuous couette-type precipitator. Chemical Engineering Science, 54(13-14): 2339-2349.
Kaminskii, V. A., Rabinovich, A. B., and Egorov, M. V. (1999). Macrokinetics of diffusion- controlled processes. Zhurnal Fizicheskoi Khimii, 73(2): 245-252.
Liu, C. I., and Lee, D. J. (1999). Micromixing effects in a couette flow reactor. Chemical Engineering Sscience, 54(13-14): 2883-2888.
El-Hamouz, A. M., and Mann, R. (1998). Effect of micro-mixing on the yield of intermediates in triplet consecutive/competitive reactions. Canadian Journal of Chemical Engineering, 76(3): 650-656.
Valerio, S.,Vanni, M., Barresi, A. A., and Baldi, G. (1998). Engineering modelling of turbulent flows in chemical engineering applications. Trends in Chemical Engineering, 5: 1-44.
Lin, W. W., and Lee, D. J. (1997). Micromixing effects in aerated stirred tank. Chemical Engineering Science, 52(21-22): 3837-3842.
Zhang, S. X., and Ray, W. H. (1997). Modeling of imperfect mixing and its effects on polymer properties. AIChE Journal, 43(5): 1265-1277.
Fournier, M. C., Falk, L., and Villermaux, J. (1996). A new parallel competing reaction system for assessing micromixing efficiency - experimental approach. Chemical Engineering Science, 51(22): 5053-5064.
Kamiwano, M., Kaminoyama, M, and Nishi, K. (1996). Measurement of turbulent mixing state in a tubular flow reactor equipped with an agitating object. Kagaku Kogaku Ronbunshu, 22(2): 334-341.
Weber, M., and Trepp, C. (1996). Required fuel contents for sewage disposal by means of supercritical wet oxidation (scwo) in a pilot plant containing a wall cooled hydrothermal burner (wchb). Process Technology Proceedings, 12 (High Pressure Chemical Engineering), 565574
Hanks, M. L., and Toor, H. L. (1995). Relative importance of macromixing and micromixing in turbulent, reacting jets. Industrial & Engineering Chemistry Research, 34(10): 3252-3256.
Mann, R., Elhamouz, A. M. (1995). A product distribution paradox on scaling-up a stirred batch reactor. AIChE Journal, 41(4): 855-867
Tavare, N. S. (1995). Mixing, reaction, and precipitation - interaction by exchange with mean micromixing models. AIChE Journal, 41 (12):537-2548.
Crundwell, F K. (1994). Micro-mixing in continuous particulate reactors. Chemical Engineering Science, 49(23): 3887-3896.
Komori, S., Kanzaki, T., and Murakami, Y. (1994). Concentration correlation in a turbulent mixing layer with chemical- reactions. Journal of Chemical Engineering of Japan, 27(6): 742-748.
Roper, D. K., and Lightfoot, E. N. (1994). Mean residence time and variance in steady counterflow separations. Chemical Engineering Science, 49(10): 1621-1630.
Atiqullah, M., Hassan, M. M., and Beg, S. A. (1993). Micromixing effects on a parallel reaction in flow reactors. Chemical Engineering & Technology, 16(4): 243-251.
Stoica, M., and Popescu, M. (1993). Radiotracer techniques used in the chemical-industry. Revista de Chimie, 44(5): 460-468.
Ranade, V. V. (1992). Decoupling of micromixing and macromixing in turbulent reacting flow. AIChE Journal, 38(3): 466-470.
Tavare, N. S. (1992). Mixing, reaction and precipitation - environment micromixing models in continuous crystallizers. 1 Premixed feeds. Computers & Chemical Engineering, 16(10-11): 923-936.
Ranade, V. V., and Bourne, J. R. (1991). Reactive mixing in agitated tanks. Chemical Engineering Communications, 99: 33-53.
Joshi, J. B. , Patil, T. A., Ranade, V. V., et al.. (1990). Measurement of hydrodynamic parameters in multiphase sparged reactors. Reviews in Chemical Engineering, 6(2-3): 73-227.
Call, M. L., and Kadlec, R. H. (1989). Estimation of micromixing parameters from tracer concentration fluctuation measurements. Chemical Engineering Science, 44(6): 1377-1389.
Dutta, A., and Tarbell, J. M. (1989). Closure models for turbulent reacting flows. AIChE Journal, 35(12): 2013-2027.
Tavare, N. S. (1989). Micromixing limits in an MSMPR crystallizer. Chemical Engineering & Technology 12(1): 1-11.
Tavare, N. S. (1989). Multiplicity in continuous crystallizers - adiabatic reactive precipitation. Chemical Engineering Communications, 80: 135-152.
Baldyga, J., and Rohani, S. (1987). Micromixing described in terms of inertial convective disintegration of large eddies and viscous convective interactions among small eddies .1. General development and batch systems. Chemical Engineering Science, 42(11): 2597-2610.
Chatterjee, A., and Tarbell, J. M. (1987). Matched asymptotic solutions of the coalescence redispersion model for unmixed feed stream plug flow reactors. Chemical Engineering Science, 42(6): 1333-1343.
Mehta, R. V., and Tarbell, J. M. (1987). An experimental-study of the effect of turbulent mixing on the selectivity of competing reactions. AIChE Journal, 33(7): 1089-1101.
Zhuang, z. (1987). Residence-time distribution of a system with complex flow. International Chemical Engineering, 27(1): 141-147.
Chang, L. J., Mehta, R.V., and Tarbell, J. M. (1986). An evaluation of models of mixing and chemical-reaction with a turbulence analogy. Chemical Engineering Communications, 42(1-3): 139-155.
Nguyen, L. T., and Suh, N. P. (1986). Processing of polyurethane polyester interpenetrating polymer networks by reaction injection-molding (rim) .1 design of a high-pressure rim system. Polymer Engineering and Science, 26(12): 781-98.
Takao, M., Yamasaki, H., and Murakami, Y. (1986). Aanalysis of mixing process for miscible fluids with monte-carlo method in stirred-tank reactor. Kagaku Kogaku Ronbunshu, 12(1): 109-113.
Tarbell. J. M., and Mehta, R. V. (1986). Mechanistic models of mixing and chemical-reaction with a turbulence analogy. Physicochemical Hydrodynamics, 7(1): 17-32.
Tavare, N. S. (1986). Mixing in continuous crystallizers. AIChE Journal, 32(5): 705-732.
Garside, J., and Tavare, N. S. (1985). Mixing, reaction and precipitation - limits of micromixing in an MSMPR crystallizer. Chemical Eengineering Science, 40(8): 1485-1493.
Kim, T.-O, Kan, W.-K. (1985). Liquid mixing characteristics in a continuous flow stirred tank reactor. Korean Chemical Engineering Research (ISSN: 0304-128x) 23(3): 189-189.
David, R., and Lintz, H. G. (1984). Study of mixing in continuous reactors using chemical-reactions. Chemie Ingenieur Technik, 56(2): 104-110.
Radhakrishnan, K., and Pratt, D. T. (1984). A coalescence dispersion model for turbulent flame stability. AIAA Journal, 22(3): 388-393.
Zwietering, T. N. (1984). A backmixing model describing micromixing in single-phase continuous-flow systems. Chemical Engineering Science, 39(12): 1765-1778.
Mehta, R. V., Tarbell, J. M. (1983). 4-environment model of mixing and chemical-reaction .1 Model development. AIChE Journal, 29(2): 320-329..
Mehta, R. V., Tarbell, J. M. (1983). 4-environment model of mixing and chemical-reaction .2 Comparison with experiments. AIChE Journal, 29 (2): 329-337.
Ou, J. J., and Ranz, W. E. (1983). Mixing and chemical-reactions - chemical selectivities. Chemical Engineering Science, 38(7): 1015-1019.
Pohorecki, R., and Baldyga, J. (1983). New model of micromixing in chemical reactors .1 general development and application to a tubular reactor. Industrial & Engineering Chemistry Fundamentals, 22(4): 392-397.
Villermaux, J. (1983). Mixing in chemical reactors. ACS Symposium Serie,s 226: 135-186.
Villermaux, J., and David, R. (1983). Recent advances in the understanding of micromixing phenomena in stirred reactors. Chemical Engineering Communications, 21(1-3): 105-122.
Patnaik, P. R., and Spiram, M. (1982). A 3-parameter model for the distributed feed reactor. Chemical Engineering Communications, 15(1-4): 125-131.
Buffham, B. A., and Kropholler, H. W. (1981). Residence-time distributions for systems having many connections with their environments. Industrial & Engineering Chemistry Fundamentals, 20(1): 102-104.
Nauman, E. B. (1981). Mixing effects on reactor modeling and scaleup 3. Residence time distributions and micromixing. Chemical Engineering Communications, 8(1-3): 53-131.
Tavlarides. L. L. and Stanatoudis. M. (1981). The analysis of interphase reactions and mass transfer in liquid-liquid dispersions. In Drew, T. B. (Editor), Advances in Chemical Engineering, 11: 199-275.
Valderrama, J. O., and Gordon, A. L. (1981). A 2-parameter model for partial segregation - application to flow reactors with premixed and unmixed feed. Chemical Engineering Science, 36(5): 839-844.
Zhuang, Z. W. (1981). Model for flow system having multiple inlet and outlet streams. Scientia Sinica, 24(5): 626-638.
Klein, J. P., and David, R.,and Villermaux, J. (1980). Interpretation of experimental liquid-phase micromixing phenomena in a continuous stirred reactor with short residence times. Industrial & Engineering Chemistry Fundamentals, 19(4): 373-379.
Levenspiel, O. (1980). The coming-of-age of chemical reaction engineering. Chemical Engineering Science, 35(9): 1821-1839.
Ritchie, B. W. (1980). Simulating the effects of mixing on the performance of un-premixed flow chemical reactors. Canadian Journal of Chemical Engineering 58(5): 626-633.
Azzopardi, B. J. . (1979). Measurement of drop sizes. International Journal of Heat and Mass Transfer, 22(9): 1245-1279.
Valibekov, Y. V., Ovsyannikov, A. A. , Polak, L. S., et al. (1979). Stochastic-model for the turbulent mixer of a plasma-chemical reactor 1 formulation of a model based on empirical-data. High Energy Chemistry 13(6): 451-456.
David, R., and Villermaux, J. (1977). Micromixing effects on complex reactions in a CSTR. Reply to the comments of D. P. Rao. Chemical Eengineering Science, 32(2): 236.
Rys, P. (1977). Selectivity of chemical-reactions disguised by diffusion .1 Chemical selectivity disguised by mixing. Angewandte Chemie - International Edition in English 16(12): 807-817.
Costa, P., Canepa, B., and Trevissoi., C. (1976). LD converter as a chemical reactor for 3-phase systems with partial segregation. Quaderni Dell Ingegnere Chimico Italiano, 12(3): 70-79.
Hill, J. C. (1976). Homogeneous turbulent mixing with chemical reaction annual. Review of Fluid Mechanics, 8: 135-161.
Truong, K. T., and Methot, J. C. (1976). Segregation effects on consecutive competing reaction in a CSTR. Canadian Journal of Chemical Engineering, 54(6): 572-577.
Aubry, C., and Villermaux, J. (1975).
Presentation of imperfect mixing of 2 currents of reagents in continuous stirred reactor. Chemical Engineering Science, 30(5-6): 457-464.
David, R., and Villermaux, J. (1975). Micromixing effects on complex reactions in a CSTR. Chemical Engineering Science, 30(11): 1309-1313.
Goto, S., and Matsubara, M. (1975). Generalized 2-environment model for micromixing in a continuous-flow reactor .1. Construction of model. Chemical Engineering Science, 30(1): 61-70.
Parimi, K, and Harris, T. R. (1975). Identification of residence time models by reacting tracer experiments. Canadian Journal of Chemical Engineering, 53(2): 175-183.
Gordeev, L. S., and Kafarov, V.V. (1974). influence of segregation on a chemical-reaction of pseudo first order in a stirred reactor with one circulation circuit .1 Journal of applied chemistry of the USSR 47(10): 2309-2313.
Rao, D. P., and Rao, A. R. (1974). micromixing effects on complex reactions in a CSTR. Chemical Engineering Science, 29(8): 1809-1813.
Zoulalian, A., and Villermaux, J. (1974). Influence of chemical parameters on micromixing in a continuous stirred tank reactor. ACS Advances in Chemistry Series, 133: 348-361.
Costa, P., and Carberry, J. J. (1973). Some remarks on role of segregation in design of a CSTR. Chemical Engineering Science, 28(12): 2257-2259.
Trambouze, P. (1973). Homogeneous reactors and liquid-liquid reactors - mixing and distribution of residence time. Revue de L' Institut Francais du Petrole, 28(1): 77-93.
Trevisso,.C., and Barbini, G. (1973). Chemical-reactions conditioned by reagent mixed by turbulent motion in homogeneous tubular-flow reactors. Atti Della Accademia Nazionale Dei Lincei Rendiconti-Classe di Scienze Fisiche-Matematiche & Naturali, 54(3): 457-464.
Honors and Awards
Distinguished Undergraduates Prize, awarded by the Egyptian Government, 1956-60.
Honorary Research Fellow in Chemical Engineering
Department, University of Exeter (England), 1977-78.
Assigned by the Jordan University to be the University Technical Representative and Contact Staff Member in the Software Licensing Contracts between the University of Jordan and Aspen Technology, Inc., Honeywell, Inc., and Numerical Algorithms Group (NAG) Limited. These three companies supply the University with the Aspentech's HYSYS software, Aspen University Package for Process Engineering, UniSim Design Process Simulation Software, NAG Fortran Library, and NAG Toolbox for MATLAB.
Several of the research publications and methodologies ofDr A H Tobgy are appreciated and cited in many International Refereed Journals, Textbooks and Encyclopedias.