title: Supercritical CO2 desorption of activated carbon loaded with 2,2,3,3-tetrafluoro-1-propanol in a rotating packed bed.
abstract: Desorption of activated carbon loaded with 2,2,3,3-tetrafluoro-1-propanol (TFP) by supercritical carbon dioxide in a rotating packed bed was investigated in this study. The experimental data show that the time required to achieve complete desorption of TFP from activated carbon in a rotating packed bed was much lower than that in a static packed bed. The reduction of desorption time is attributed to the presence of centrifugal force. The supercritical CO2 desorption efficiency in a rotating packed bed was observed to increase with increasing rotation speed, pressure, and C02 flow rate. To enhance desorption efficiency, a smaller activated carbon particle size was suggested. At low operating pressures such as 8.96 and 11.72 MPa, a better desorption efficiency was found to occur at lower temperatures in a temperature range of 305-335 K. However, at high operating pressures such as 15.86 MPa, a temperature of 315 K was found to be more appropriate for desorption, as compared to other temperatures. Due to a reduction of packed bed volume and an increase in desorption efficiency, supercritical CO2 desorption in a rotating packed bed is suggested for recovering TFP from the exhaust gases.
authors.affiliation: Department of Chemical Engineering, National Tsing Hua University, Hsinchu, Taiwan 30013, ROC. cstan@mx.nthu.edu.tw
authors.forename: Chung-Sung
authors.initials: CS
authors.lastname: Tan
authors.forename: Pei-Lun
authors.initials: PL
authors.lastname: Lee
mesh_terms: D000327:Adsorption; D000393:Air Pollutants / Q000737:chemistry*; D000397:Air Pollution / Q000517:prevention & control; D002244:Carbon / Q000737:chemistry*; D002245:Carbon Dioxide / Q000737:chemistry*; D003247:Conservation of Natural Resources / Q000379:methods*; D005466:Fluorocarbons / Q000737:chemistry*; D010316:Particle Size; D011312:Pressure; D020005:Propanols / Q000737:chemistry*; D013696:Temperature
chemical_list: D000393:Air Pollutants; D005466:Fluorocarbons; D020005:Propanols; D002245:Carbon Dioxide; D002244:Carbon; C519792:2,2,3,3-tetrafluoro-1-propanol