Download School of Chemical Engineering and Materials Science

SCHOOL OF CHEMICAL, BIOLOGICAL & MATERIALS
ENGINEERING
The University of Oklahoma
Norman, Oklahoma
2004 – 2005 Seminar Series
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DR. WARREN D. SEIDER
PROFESSOR
DEPARTMENT OF CHEMICAL AND BIOLMOLECULAR ENGINEERING
UNIVERSITY OF PENNSYLVANIA
PHILADELPHIA PENNSYLVANIA
Will present a seminar on
“A GAME THEORETIC APPROACH TO
MULTI-OBJECTIVE PROCESS DESIGNS”
A method of designing processes that are inherently safe is introduced. In cases where safety
is not threatened (e.g., in isothermal fermentation reactors), but product compositions can
rapidly degrade, this method provides designs that insure high product quality (e.g., in
pharmaceuticals processes). Using game theory, the method accounts for the tradeoffs in
profitability, controllability, safety and/or product quality, and flexibility. For nonlinear processes
that are hard to control, that is, have an unstable and/or non-minimum phase steady state, over
a wide range of operating conditions, extended bifurcation diagrams (EBDs) are introduced.
When a steady state is non-minimum-phase, the process may exhibit inverse response. The
steady states of processes are classified on the basis of instability and non-minimumphaseness to segregate the operating regimes into distinct zones. Local optimal designs, one
corresponding to each zone, are obtained first. These are compared with other local optimal
designs at alternate operating conditions, and/or process reconfigurations, to obtain the global
optimal design using game theory. Four indices, profitability, controllability, safety and/or
product quality, and flexibility, characterize the optimality of a design. A novel index for safe
operation and/or product quality at a steady state is formulated as a function of the eigenvalues
of the Jacobian of the process model and the Jacobian of the process zero dynamics, both
evaluated at the steady state, providing a quantitative measure of instability and non-minimum
phase behavior. The application of the proposed method to an isothermal continuous stirredtank reactor (CSTR) with van der Vusse reactions, an exothermic CSTR, and an anaerobic
fermentor with substrate and product inhibition, is presented.
THURSDAY, MARCH 3, 2005
COOKIES AND COFFEE -- 2:30 P.M.
SEMINAR -- 3:00 P.M.
SARKEYS ENERGY CENTER, ROOM M-204
THIS IS A REQUIRED SEMINAR FOR CHE 5971