Abstract
The adsorption and separation of a binary mixture of N2 and HFC-134a (1, 1, 1, 2-tetrafluoroethane) on activated carbon fibers (ACFs) was investigated by experiment and the grand canonical Monte Carlo (GCMC) method. The effects of pore size, pressure and temperature on the selectivity of HFC-134a over N2 on ACF were investigated. Results show that the selectivity of HFC-134a decreases with an increase in pore size, pressure and temperature. The selectivity of HFC-134a on ACF with a pore size distribution reaches 62 at room temperature, indicating that our sample is an excellent candidate for the removal of HFC-134a from air. In particular, the selectivity of HFC-134a over nitrogen on ACF with pores of 0.75 nm in size can reach 230 at 0.41×10^5 Pa and room temperature. Therefore, carbon materials with small pores are recommended to adsorb HFC-134a efficiently.
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