Process simulation of CHF3/N2 separation by pressure swing adsorption using SIFSIX-3-Ni
The adsorption column was filled with SIFSIX-3-Ni(MOF)as the adsorbent.The purification process of CHF3 from CHF3/N2 mixture by pressure swing adsorption(PSA)was simulated by a two-bed six-step model using Aspen adsorption.The effects of adsorption pressure,feed flow rate,adsorption time,pressure equalization time,blow down time and vacuum degree on the purity and recovery of CHF3 were studied.The optimum process simulation conditions have been achieved when the adsorption pres-sure,feed flow rate,adsorption time,pressure equalization time,blow down time and vacuum degree are 1.5 bar,0.6 m3·h-1,165 s,22 s,95 s,0.1 bar,respectively.Under this condition,the purity of CHF3 is above 99％and the recovery is above 90％.
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