文摘
Adsorption isotherms of pure C<sub>2sub>H<sub>4sub> and C<sub>3sub>H<sub>6sub> were measured on 11 adsorbents and at pressures up to 0.8 MPa using a volumetric method. The Brunauer–Emmett–Teller (BET) surface area of the adsorbents had a significant effect on adsorption capacities of both C<sub>2sub>H<sub>4sub> and C<sub>3sub>H<sub>6sub>. The metal organic framework MIL-101 had the highest BET surface area and the highest adsorption capacity. For zeolite molecular sieves 5A, the C<sub>2sub>H<sub>4sub> adsorption capacity was higher than that of C<sub>3sub>H<sub>6sub>, which is opposite to the results for most adsorbents. The isosteric heats of C<sub>3sub>H<sub>6sub> on AC-1, 5A, MIL-101, ZIF-8, and SG-1 were higher than those of C<sub>2sub>H<sub>4sub>. The C<sub>3sub>H<sub>6sub>/C<sub>2sub>H<sub>4sub> separation selectivities were calculated using the ideal solution theory, and the activated carbon AC-1 had the highest separation selectivity of 8.8.
