An overview on control strategies for CO2 capture using absorption/stripping system

•Basic/advanced process control strategies for CO2 removal via absorption/stripping.•Plant operability via proper control of overall water balance and fluid inventories.•Plant performance via CO2 capture rate, reboiler temperature, energy performance.•Advanced MPC to account for constraints on the controlled and manipulated variables. CO2 removal via absorption/stripping system using chemical solvents is a widely acknowledged technology for CO2 capture, either from natural gas or post-combustion processes. It offers higher capture efficiency. However, one of its main drawbacks is the high energy consumption in the regeneration step. Besides, for solvent-based absorption/stripping plant, the units feature nonlinearities as well as high process interactions. Hence, control strategies are crucial in the operational optimization of process set-point changes and disturbance rejections as well as reduction in the operational costs of such systems. Process control systems are key in processing plants as they direct production processes, minimise variations and regulate product consistency. In this paper, an overview on the related efforts that have been carried out in terms of basic and advanced process control strategies are reviewed to provide further understanding on the key features that are required to optimize the operation of the absorption/stripping system.