| 초록 |
CO2 emission from the combustion of fossil fuels in conventional power plants is recognised as one of the main source of global climate change. An absorption process using aqueous amine is the most common CO2 capture process. Despite of many advantages of an amine absorption process,it still needs some hard works such as lowering its operating cost. During an amine absorption process, the distillation process is known as the most high energy consuming and responsible for the main operational cost. In this study, membrane vacuum stripping process was applied to desorption process for the purpose of the reduction of desorption energy in an amine absorption process. 20 wt% of aqueous MEA(monoethanolamine) solution was used as the absorbent and PTFE(polytetrafluoroethylene) which has high chemical, thermal stability was used as a support of composite membrane. PTMSP(poly(1-trimethylsilyl-1-propyne)) knowing large free volume and high permeability was coated on the one side of PTFE support with desired thickness. The stripped CO2 fluxes were checked at various solution temperatures and vacuum pressures. |
