(91c) Theoritical and Experimental Analysis of CO2 Removal from Natural Gas-Effects of Different Operating Conditions

In this study, first of all CO₂ removal from natural gas (NG) system has been simulated by Aspen plus. Process optimization has been done by Aspen sensitivity analysis to ensure best performance for each unit.  Effects of different operating conditions including pressure and NG composition on CO₂ capture have been investigated. Change in methane, ethane and propane affect CO₂ capture and CO₂ /methane mole fractions in vapor stream. It is demonstrated that change in heavier part of NG will have significant effect on capture percentage. By increasing pressure to 400 psi, CO₂ capture of 99.4% has been achieved. The results from modeling have been verified by experimental demonstration.  Last but not the least, total capital cost and utilities’ cost have been compared.