Key Words:HIGH CO/CO2 SELECTIVITY; CO ADSORPTION; CAPACITY; SEPARATION; MEMBRANE; N-2; H-2; AC
Abstract:Cu(I) based adsorbents are effective materials for selectively adsorbing and separating CO from mixed gases. Currently, for the fabrication of Cu(I) based adsorbents using divalent copper salts as precursors, the commonly used reducing gases of H 2 and CO are expensive, and their strong reduction ability can easily lead to excessive reduction of Cu 2 + ions to elemental copper. Herein, a series of Cu(I) based ultrastable Y (USY) zeolite adsorbents (CuCl@USY) were facilely prepared using CuCl 2 as the precursor and various easily available solid species as reducing agents. Activated carbon was screened as a suitable solid reducing agent, and the precursor CuCl 2 were successfully activated to active components CuCl and dispersed well on the surface of Y zeolite support at 643 K in the N 2 atmosphere. The optimized CuCl@USY adsorbent exhibits an excellent CO adsorption capacity of 2.92 mmol/g at 303 K and 500 kPa. In addition, the adsorbent displays the high CO adsorption selectivity towards CO 2 , CH 4 and N 2 . The excellent CO adsorption performance as well as the good reusability and regeneration ability make the prepared CuCl@USY a promising adsorbent for the efficient CO adsorption and separation from gas mixture.
Volume:700
Issue:
Translation or Not:no