Telemark University College
3901, Porsgrunn, Norway
udara.s.p.arachchige@hit.no; aryalneel4all@yahoo.com
Prof. Morten C. Melaaen
Telemark University College/Tel-Tek
3901, Porsgrunn, Norway
Morten.C.Melaaen@hit.no
Abstract
The CO2 is one of the main pollutants for global warming and climate change effect. In order to carry on power generation by fossil fuel, CCS technologies are required to reduce the environmental impact by CO2 emissions. Currently, chemical absorption is the preferred option for CO2 capture by post combustion.The detailed description of the CO2 removal process using mono-ethylamine (MEA) as a solvent for coal fired power plant is present in this paper. The model is implemented in Aspen Plus and possible chemical reactions were introduced using an electrolyte wizard. The rate based Electrolyte NRTL activity coefficient model is used in the Aspen Plus with 25w/w % MEA solution and 0.25 as lean CO2 loading.
CO2 removal efficiency was specified as a design specification option in Aspen Plus with the variation of Distillate rate in the stripper. With the help of sensitivity analysis, optimum parameters were selected for packed bed absorber and stripper column. The complete removal process with re-circulating solvent back to the absorber is implemented with the sequential modular method in Aspen Plus. The most significant cost related to CO2 capture is the energy requirement for re-generating solvent, i.e. re-boiler duty. Thus, re-circulating solvent with make-up stream is added to the system to get lowest possible energy demand. The re-boiler duty requirement on 85% of CO2 removal was calculated as 4120 kJ/kg CO2 after several iterations. The temperature profiles are used to check the model behaviour.
Fig 1: Process flow diagram for coal fired power plant
nice...hope you will go there to present this
ReplyDeleteHope you will update with some more details related to the different kinds of amines. I think it will be very interesting to read something related to that since your current simulations are dealing with that.
ReplyDeleteCoal Terminals and additional infrastructure are required in the coal supply chain. Coal newsletters and coal prices show developing economies are more likely to increase their investment into & their use of thermal coal & metallurgical coal in coming years because of its affordability and to meet increasing demands for electricity and steel. www.coalportal.com
ReplyDeleteI am new in Aspen plus.Currently working on a simulation process for capturing CO2 by absorption with monoethanolamine(MEA)solvent from flue gas.I am using Radfrac absorption column for designing absorber and stripper columns .Can you help me regarding using of radfrac columns? or send me the model simulation for this process? or any data u have about this simulation. Please email me at dibyenduroy8@gmail.com
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