Selective CO adsorbent CuCl/AC prepared using CuCl2 as a precursor by a facile method

Abstract

Activated carbon (AC) supported CuCl (CuCl/AC) has been prepared with CuCl₂ as precursor by a monolayer dispersion method. The samples are investigated for CO adsorption and characterized by inductively coupled plasma optical emission spectrometry, X-ray diffraction, N₂ adsorption/desorption and X-ray photoelectron spectroscopy. The characterization results reveal that CuCl₂ supported on AC can be completely converted to CuCl after activation at 543 K in N₂. The resulting adsorbent displays high CO adsorption capacity, high CO/N₂, CO/CH₄ and CO/CO₂ adsorption selectivities and excellent reversibility, and the adsorption equilibrium isotherms of CO on the adsorbents at temperatures up to 333 K can be well fitted by both the Langmuir and Sips models.