A facile approach to prepare Cu(I) based adsorbents for selective CO adsorption with excellent oxidation resistance ability

Cu(I)-based adsorbents are currently the most commonly used CO adsorbents due to their high adsorption capacity and adsorption selectivity for CO. In order to achieve a facile preparation and improved antioxidant performance of Cu(I)-based adsorbents, in this work, a series of Cu(I) based CO adsorbents were designed and prepared by choosing CuCl₂ as the precursor, ultra-stable Y-type molecular sieves (USY) as the support, and methyl cellulose (MC) as a solid reductant. The MC introduction not only can reduce the precursor CuCl₂ to the active component CuCl, but also play a key role in improving the antioxidant performance of the adsorbent. The optimized adsorbent CuCl(5.0)@USY-MC(8%) exhibits an excellent antioxidant performance, maintaining 76% of CO adsorption capacity of fresh adsorbent after being placed in the air for 24 h. In addition, the adsorbent shows the high adsorption capacity, adsorption selectivity and good cycling stability for CO. The excellent CO adsorption performance as well as good antioxidant ability make the developed adsorbent a promising candidate for the efficient CO adsorption and separation from the gas mixture.