Chemical Engineering & Technology

Cover image for Vol. 38 Issue 4

Impact Factor: 2.175

ISI Journal Citation Reports © Ranking: 2013: 39/133 (Engineering Chemical)

Online ISSN: 1521-4125

Associated Title(s): Chemie Ingenieur Technik, ChemBioEng Reviews, Energy Technology

Editors' Choice

Every month, the Editors select two papers referring to current discussions in the scientific, public and economic communities and in view of the potential for further developments. The papers are freely accessible for one month.

Variable Cascade Control Structure for Tubular Reactors

March 13, 2015


Tubular reactors are widely used for the processing of a large number of chemical and petrochemical products. Regulation of the process variables is desired in order to ensure safe operation and high quality of the outflow composition. The primary control objective is the maintenance of safe operation by requiring that the temperatures in the reactor do not exceed some specified maximum values. The practical application of controllers can require large amounts of system information and online measurements. The complexity and model dependency of the resulting feedback controllers can be serious limitations for their application in industrial processes. Galo Urrea-Garcia et al. proposed a variable cascade control structure in order to enhance the robustness and performance properties of linear controllers. The control structure is based on multiple feedback linear proportional-integral cascade controllers driven by the outlet composition and multiple temperature measurements. Because of its adaptive capabilities, the proposed variable control structure is aimed to overcome the possible disagreement between the real and simulated (model-based) processes. This is an important advantage over conventional linear control, and even over advanced control strategies, which exhibit high model dependency.

Galo R. Urrea-García*, Sergio Reséndiz-Camacho, José Álvarez-Ramírez, and Guadalupe Luna-Solano
Variable Cascade Control Structure for Tubular Reactors
Chem. Eng. Technol. 2015, 38 (3), 521–529.
DOI: 10.1002/ceat.201300518