Abstract: Based on the principle that compounds can spontaneously disperse to the surfaceof supports to form a monolayer, heating supports of high surface area such as γ-Al₂O₃, 4A,13X, NaYand CuYzeolites etc.with CuCl adsorbents with CuCl highly dispersed on thesurface of the supports can e btained.XRDand EXAFSexperiments have shown that theCuCl is in atomic scale dispersion.The best adsorbents CuCl/NaYand CuCl/CuYcan haveCOcapacity of 90 mL/g support and 100 mL/g support respectively at 20℃ and COpartialpressure of 60 kPa.A CuCl/zeolite adsorbent PU-1 whcih has optimization recipe and suit-able binder has been made in commercial scale.The adsorbent has been used in a PSApro-cess successfully to separate COfrom gas mixtures of CO, H₂,N₂, CH₄ and CO₂. The COproduct has a purity >99% with yield>85%.It has also been used to remove trace COinH₂ or N₂ at >5000 h.The purified gases have CO <1 X 10^-6 mol/L.

Key words: Adsorbent, CO, Adsorptive separation, Monolayer dispersion, Copper zeolite