Volume 48, Issue 5 e70018
Research Article

Development of Process Control Strategy for Acid Gas Sweetening Process

Lei Lian

Lei Lian

Guangdong Provincial Key Lab of Green Chemical Product Technology, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou, 510640 China

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Weiqi Liu

Weiqi Liu

Guangdong Provincial Key Lab of Green Chemical Product Technology, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou, 510640 China

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Yanhui Qiao

Corresponding Author

Yanhui Qiao

School of Chemistry, Guangdong University of Petrochemical Technology, Maoming, 525000 China

E-mail: [email protected]; [email protected]

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Hao Ma

Hao Ma

School of Chemistry, Guangdong University of Petrochemical Technology, Maoming, 525000 China

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Junjiang Teng

Junjiang Teng

School of Chemistry, Guangdong University of Petrochemical Technology, Maoming, 525000 China

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Yanbin Jiang

Corresponding Author

Yanbin Jiang

Guangdong Provincial Key Lab of Green Chemical Product Technology, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou, 510640 China

School of Chemical Engineering, Guangdong University of Petrochemical Technology, Maoming, 525000 China

E-mail: [email protected]; [email protected]

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First published: 14 April 2025

Abstract

This study aims to develop a process control strategy for the acid gas sweetening process based on dynamic simulation, disturbances of ±5 % are introduced in terms of flowrate and composition. The stability and controllability of control system are evaluated using indicators such as integral absolute error (IAE) and deviation in heat duty (∆Q). The results demonstrate that the composition-ratio control scheme for the absorption section combines the advantages of fast response from ratio calculation and precise composition control. Accordingly, the double-temperature control scheme for the regeneration section effectively mitigates overshoot and reduces settling time, resulting in a significant reduction of 31 % for a IAE of H2S concentration in lean solvent and 26 % for the ∆Q, respectively.

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