Simulation Comparison Between Equilibrium and Rate-Based Approach for CO₂ Removal Via Promoted K₂CO₃ with Glycine

¹ CO 2 Research center (CO2RES), Universiti Teknologi PETRONAS (UTP), Seri Iskandar, Perak, Malaysia
² Faculty of Chemical and Natural Resources Engineering, Universiti Malaysia Pahang (UMP), Kuantan, Pahang, Malaysia

^* Corresponding author: haslindazabiri@utp.edu.my

Abstract

The main limitation of rate-based approach in Aspen Plus is the unavailability of the method under dynamic analysis. Hence, to support the development of the integrated process of natural gas treatment at a higher scale, a comprehensive equilibrium and rate-based simulations of CO₂ removal via potassium carbonate promoted with glycine (PCGly) is conducted. The purpose of this study is to observe the efficiency of the equilibrium-based model to represent the CO₂ removal system before the dynamic simulation can be developed. The validation is conducted based on published experimental data and the result shows that at steady state, the equilibrium-based method is able to predict the CO₂ removal as satisfactorily as the rate-based approach. The error deviation between both methods is 2.11 % and through this study, it is shown that the equilibrium-based method is able to simulate the CO₂-PGly system efficiently. Thus, this would enable further investigation of the CO₂-PGly system under dynamic simulation using the equilibrium-based method.