Polymer-Protected Metal Complex for Gas Separation. III. Water-Resistivity of Polystyrene Resin-Supported Aluminium Copper(I) Chloride as Solid Carbon Monoxide Adsorbent

Abstract

Abstract Solid adsorbents of carbon monoxide are prepared from aluminium chloride, copper(I) chloride, and a macroreticular type polystyrene resin by use of various solvents, and their resistivities against water vapor are investigated. The adsorbing capacities of the adsorbents prepared by use of carbon disulfide and dichloromethane remain virtually unchanged even after repeated (3–5 times) contacts of the adsorbents with nitrogen gas containing 10 mol% water with respect to the charged copper(I) chloride (water contents: 5600 and 4600 ppm). The adsorbents obtained with the use of benzene and toluene as preparation solvents, however, exhibit small but gradual decreases in the adsorbing capacities on the repeated contacts with nitrogen gas containing water. Scanning electron microscopy and energy dispersive X-ray microanalysis on the water-resistant adsorbents, prepared with the use of carbon disulfide and dichloromethane, show that the active species for the adsorption, aluminium copper(I) chloride, uniformly distributes in the beads of the polystyrene resin without formation of aggregates. Almost all of aluminium copper(I) chloride is located in the apolar microporosities of the polystyrene resin here, and is effectively protected from water vapor.