pH control using an identification reactor

Su Whan Sung, In Beum Lee, Dae Ryook Yang

Research output: Contribution to journalArticle

15 Citations (Scopus)

Abstract

pH control plays an important role in chemical processes. However, pH control has been recognized as a very difficult control problem because of its nonlinearities and time-varying characteristics. A new pH control strategy using an identification reactor is proposed to incorporate both the nonlinearities and time-varying characteristics of the pH process. In this study, an equivalent titration curve between the pH value and the scaled total ion concentration of the titrating stream is obtained from the identification reactor, and the pH value is controlled in the main reactor using the obtained equivalent titration curve. A simple stability analysis is used to determine the tuning parameters of the PI controller. Simulation results show that the proposed control strategy can handle both the nonlinearities and time-varying characteristics.

Original languageEnglish
Pages (from-to)2418-2426
Number of pages9
JournalIndustrial and Engineering Chemistry Research
Volume34
Issue number7
Publication statusPublished - 1995 Jul 1

Fingerprint

nonlinearity
Titration
chemical process
stability analysis
ion
Tuning
simulation
reactor
Ions
Controllers
pH-value
parameter

ASJC Scopus subject areas

  • Chemical Engineering (miscellaneous)
  • Environmental Science(all)
  • Polymers and Plastics

Cite this

pH control using an identification reactor. / Sung, Su Whan; Lee, In Beum; Yang, Dae Ryook.

In: Industrial and Engineering Chemistry Research, Vol. 34, No. 7, 01.07.1995, p. 2418-2426.

Research output: Contribution to journalArticle

Sung, Su Whan ; Lee, In Beum ; Yang, Dae Ryook. / pH control using an identification reactor. In: Industrial and Engineering Chemistry Research. 1995 ; Vol. 34, No. 7. pp. 2418-2426.
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