| 초록 |
Bromotrifluoromethane (Halon-1301) and bromochlorodifluoromethane (Halon-1211) have been used as a clean, non-toxic and effective fire extinguishing agents for a long time. However, these compounds are being phased out because of their ozone-depletion potential. HFC-227ea (1, 1, 1, 2, 3, 3, 3-heptafluoropropane, CF3CFHCF3) is known to be one of the promising replacements of Halon-1301 and Halon-1211. It has been proposed to synthesis HFC-227ea by a procedure involving vapor phase or liquid phase reaction between hexafluoropropene and hydrogen fluoride. Therefore, it is necessary to separate products from unreacted raw materials after they leave a reactor. In order to ensure to meet its specification of HFC-227ea, an adsorption operation is employed for separating out hexafluoropropene.To design an adsorption process, thermodynamic data on adsorption equilibria must be known over wide range of temperatures. Until quite recently, however, there is no reliable information concerning adsorption of hexafluoropropene and HFC-227ea on activated carbon at various temperatures. In this regard, the present study has been devoted to the measurement of adsorption isotherms of hexafluoropropene and HFC-227ea on activated carbon at 283, 303, 333, and 363 K.
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