SCI和EI收录∣中国化工学会会刊

中国化学工程学报 ›› 2025, Vol. 88 ›› Issue (12): 198-210.DOI: 10.1016/j.cjche.2025.06.021

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A modeling error compensation control approach for CO2 and H2S absorption in a hollow-fiber membrane contactor

Jorge A. Romero-Bustamante1, Miguel Ángel Gutiérrez-Limón2, Eliseo Hernandez-Martinez1   

  1. 1. Universidad Veracruzana, Facultad de Ciencias Químicas, Circuito Universitario Gonzalo Aguirre Beltrán 91000, Xalapa, Veracruz, Mexico;
    2. Universidad Autónoma Metropolitana-Azcapotzalco, Departamento de Energía, Av San Pablo Xalpa 180, San Martin Xochinahuac, Azcapotzalco, 02200, Ciudad de México, CDMX, México
  • 收稿日期:2025-01-23 修回日期:2025-06-29 接受日期:2025-06-30 出版日期:2026-02-09 发布日期:2025-08-07
  • 通讯作者: Jorge A. Romero-Bustamante,E-mail:jorgromero@uv.mx;Eliseo Hernandez-Martinez,E-mail:elisehernandez@uv.mx

A modeling error compensation control approach for CO2 and H2S absorption in a hollow-fiber membrane contactor

Jorge A. Romero-Bustamante1, Miguel Ángel Gutiérrez-Limón2, Eliseo Hernandez-Martinez1   

  1. 1. Universidad Veracruzana, Facultad de Ciencias Químicas, Circuito Universitario Gonzalo Aguirre Beltrán 91000, Xalapa, Veracruz, Mexico;
    2. Universidad Autónoma Metropolitana-Azcapotzalco, Departamento de Energía, Av San Pablo Xalpa 180, San Martin Xochinahuac, Azcapotzalco, 02200, Ciudad de México, CDMX, México
  • Received:2025-01-23 Revised:2025-06-29 Accepted:2025-06-30 Online:2026-02-09 Published:2025-08-07
  • Contact: Jorge A. Romero-Bustamante,E-mail:jorgromero@uv.mx;Eliseo Hernandez-Martinez,E-mail:elisehernandez@uv.mx

摘要: Hollow fiber membrane contactor (HFMC) units are one of the most promising technologies for improving conventional absorption processes. Traditionally, the optimization and control of this process is based on simplified mathematical models or linearized control proposals that may present limitations. This work introduces a robust control based on modeling error compensation (MEC) applied to CO2 and H2S absorption in a HFMC for natural gas sweetening. The HFMC model considers the concentration distribution in radial and axial coordinates. A classical PI controller and a sliding model controller (SMC) are applied for comparison purposes. Simulation results show that the proposed control MEC is suitable for regulating the sour gas concentration to values that reduce their presence at the HFMC from 0.85% to 0.45% (mol) of CO2 and from 4 to 1.2 μl·L-1 of H2S, independent of external disturbances and setpoint changes. Likewise, MEC’s ability to compensate for modeling uncertainties through a simple and easily implemented design provides robust performance that satisfies international standards in natural gas quality, showing a 40% better performance according to the integral of squared error compared with the SMC controller.

关键词: Robust control, CO2/H2S absorption, HFMC

Abstract: Hollow fiber membrane contactor (HFMC) units are one of the most promising technologies for improving conventional absorption processes. Traditionally, the optimization and control of this process is based on simplified mathematical models or linearized control proposals that may present limitations. This work introduces a robust control based on modeling error compensation (MEC) applied to CO2 and H2S absorption in a HFMC for natural gas sweetening. The HFMC model considers the concentration distribution in radial and axial coordinates. A classical PI controller and a sliding model controller (SMC) are applied for comparison purposes. Simulation results show that the proposed control MEC is suitable for regulating the sour gas concentration to values that reduce their presence at the HFMC from 0.85% to 0.45% (mol) of CO2 and from 4 to 1.2 μl·L-1 of H2S, independent of external disturbances and setpoint changes. Likewise, MEC’s ability to compensate for modeling uncertainties through a simple and easily implemented design provides robust performance that satisfies international standards in natural gas quality, showing a 40% better performance according to the integral of squared error compared with the SMC controller.

Key words: Robust control, CO2/H2S absorption, HFMC