Optimization of Bohart-Adams Model of the Fixed‑Bed Adsorption Column for Treating Gas from Basra Gas Treating Unit

Abstract

Natural gas is an essential energy source that requires purification before transportation and use. At the Basrah Natural Gas Liquification (BNGL) plant, the gas dehydration unit (GDU) is tasked with minimizing water content to avert hydrate formation, corrosion, and related complications. An adsorption process using molecular sieves is necessary for separation from water vapor.An enhancement on the adsorption stage of the GDU was implemented by fitting Bohart-Adams model over 6 months using both genetic algorithm (GA) for optimization and parametersand gas concentration which include the gas velocity.Via Bohart-Adams model outlook for breakthrough behavior and investigation of the efficiency of adsorbing processThe critical parameters are optimized with a genetic algorithm in Bohart-Adams model -- e.g., adsorption rate constant (????) and saturation concentration (????₀). Optimization greatly reduced the discrepancy between theory and experimental data, improving the model's predictive ability for adsorption behavior.Also, with the aid of GA we were able to find the optimum parameter values that raised the dehydration unit's overall efficiency.The results show that the combined effect of flow rate and water vapor concentration of the breakthrough curve is large. Where the best performance was achieved Water vapor concentrations at 450 to 500 ppmV within a gas stream rate of 100 to 110 million standard cubic feet per day (MMSCFD) did not require any reactivation as occurred during avery successful test having these settings Reactivation was unnecessary under these conditions because it had completely honest behavior.