investigation of hydrate formation conditions of simulated flue gas in tbab solution with potential application in co2 capture in steel industry

The rising amount of co2 in the atmosphere is one of the most urgent environmental issues of our age. in order to reduce anthropogenic co2 emissions, carbon capture and storage (ccs) can be applied to large point sources like steel-making plants; in recent years, the new approach of hydrate-based co2 capture (hbcc) from flue gas has attracted considerable attention. information on the hydrate equilibrium conditions of flue gas is the prerequisite for this method. in this study, semi-clathrate hydrate equilibrium conditions for the simulated flue gas (co2-n2 mixture) in tbab solution, as a good promoter for hbcc, were modeled in the temperature range of 281-288.1 k. the co2 concentration in the gas mixture was varied in the range of 15-40 mol%, and the tbab concentration was varied in the range of 5-10 wt.%. the results clearly showed the promoting effect of tbab on the hydrate equilibrium conditions. the modelling results showed good agreement with experimental data, with an average absolute percentage deviation of 9.5. also, the model had better accuracy at lower co2 concentrations.