Resumo

HERNANDEZ-MARTINEZ, E.; URREA, R.  e  ALVAREZ-RAMIREZ, J.. Improved cascade control scheme for tubular reactors. Rev. Mex. Ing. Quím [online]. 2008, vol.7, n.3, pp.309-318. ISSN 1665-2738.

Tubular reactors are difficult to operate due the intricate coupling between transport processes, nonlinear chemical kinetics, and their distributed nature. However, due to numerous industrial applications for chemical tubular reactors, the problem of monitoring and controlling them effectively is of great safety and economical importance. In this work, we introduce a new cascade control scheme based on three-temperature measurement distributed along the axial position of the tubular reactor with respect to a weighted average temperature (w_av). The control configuration exploits the information provided by two additional temperatures sensor located at the feed and the output of the tubular reactor. The configuration with w_av improves the behavior of the control scheme by enhancing the disturbance and parameter's uncertainty. Numerical simulations are used to illustrate and compare the control performance.

Palavras-chave : cascade control; average temperature; tubular reactor.