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Inferential Composition Control of a Distillation Column Using Active Disturbance Rejection Control with Soft Sensors

Lookup NU author(s): Fahad Al Kalbani, Dr Jie ZhangORCiD



This work is licensed under a Creative Commons Attribution 4.0 International License (CC BY 4.0).


© 2023 by the authors.This paper presents the integration of active disturbance rejection control (ADRC) with soft sensors for enhancing the composition control performance in a distillation column. Static and dynamic soft sensors are developed to estimate the top and bottom product compositions using multiple tray temperatures. In order to cope with the collinearity issues in tray temperature measurements, static and dynamic principal component regression is used in developing the soft sensors. The soft sensor outputs are introduced as the feedback signals to ADRC. This control scheme is termed as “inferential ADRC control”. Static control offsets are eliminated through mean updating in the soft-sensor models. The effectiveness of the proposed control scheme is demonstrated on a benchmark simulated methanol-water distillation column.

Publication metadata

Author(s): Al Kalbani F, Zhang J

Publication type: Article

Publication status: Published

Journal: Sensors

Year: 2023

Volume: 23

Issue: 2

Online publication date: 16/01/2023

Acceptance date: 13/01/2023

Date deposited: 01/02/2023

ISSN (print): 1424-8239

ISSN (electronic): 1424-8220

Publisher: MDPI AG


DOI: 10.3390/s23021019


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Funder referenceFunder name
EU FP7 (Ref: PIRSES-GA-2013-612230)
Petroleum Development of Oman