Title :
Strong Acid Equivalent Control of pH Processes: An Experimental Study
Author :
Wrig, Raymond A. ; Soroush, Masond ; Kravaris, Costas
Author_Institution :
Department of chemical Engineering, The University of Michigan, Ann Arbor, MI 48109; The Dow Chemical Company, 1400 Building, Midland, MI 48667
Abstract :
The control of pH is widely recognized as a difficult problem. The Strong Acid Equivalent approach for control of pH processes consists of defining an alternate equivalent control objetive, the Strong Acid Equivalent, which is linear in the states and using a linear control law in terms of this new control objective. The Strong Acid Equivalent is then calculated on line from pH measurements given a nominal titration curve of the inlet stream. A laboratory system has been built to implement this method. Experimental results for the hydrochloric acid / sodium hydroxide and acetic acid / sodium hydroxide systems are given. The results show the control which can be achieved with the Strong Acid Equivalent method.
Keywords :
Adaptive control; Chemical processes; Cities and towns; Control system synthesis; Control systems; Laboratories; Level control; Mathematical model; Process control; Programmable control;
Conference_Titel :
American Control Conference, 1991
Conference_Location :
Boston, MA, USA
Print_ISBN :
0-87942-565-2
