MEA Based Carbon Dioxide Capture Simulation And Analysis

Greenhouse gases mainly contain CO2,steam and NO,and CO2 was considered to being a key effect on the global warming.The reduction of C02 has been regarded as a key technology to slow down the global warming.MEA-based Post-combustion CO2 capture technology has been considered as one of the most feasible and viable technologies to mitigate C02 emissions since it can be easily integrated with existing fossil-fired power plants and newly-built power plants.Thus,in this work,a model describing the steady-state and dynamic operation of a commercial-scale post-combustion C02 capture plant has been developed.The proposed steady-state CO2 capture model has been used to perform a techno-economic analysis and to evaluate the process performance to changes in key design parameters,i.e.the heights of the absorber and stripper.The results from this analysis indicate that annualized cost is the lowest when the heights of the absorber and stripper columns are increased by 20%compared to other scenarios.The deign condition when the height of both columns were increased by 20%was therefore regarded as an economic case.The proposed economic model has also been used to evaluate the dynamic performance under various scenarios,e.g.changes in the reboiler heat duty and flue gas flow rate.The result shows that the transient behavior of economic model has little difference with the base case when 10%of reboiler duty was introduced to the system.The C02 capture rate and CO2 mass flow rate in the production stream have longer settling times compared to other process variables.In addition,the flue gas flow rate varies throughout the day due to the changing in the electricity demands.Thus,in the present study,the 10%of ramp change in the flue gas flow rate was introduced to evaluate the performance of transient behavior.The results show that the carbon capture rate reduced significantly if the reboiler duty remains the same.The insights gained through this analysis will be instrumental to design basic and advanced control strategies for the C02 capture plant.