کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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160147 | 457064 | 2005 | 8 صفحه PDF | دانلود رایگان |
We compared experimental and model data for the facilitated transport of CO2 from a CO2–air mixture across an aqueous solution of diethanolamine (DEA) via a hollow fiber, contained liquid membrane (HFCLM) permeator. A two-step carbamate formation model was devised to analyze the data instead of the one-step mechanism used by previous investigators. The effects of DEA concentration, liquid membrane thickness and feed CO2 concentration were also studied. With a 20% (wt) DEA liquid membrane and feed of 15% CO2 in CO2–air mixture at atmosphere pressure, the permeance reached 1.51E−8 mol/m2 s Pa with a CO2/N2 selectivity of 115. Model predictions compared well with the experimental results at CO2 concentrations of industrial importance. Short-term stability of the HFCLM permeator performance was examined. The system was stable during 5-days of testing.
Journal: Chemical Engineering Science - Volume 60, Issue 24, December 2005, Pages 6868–6875