Composite Sorbent with Honeycomb Structure for Capturing Platinum Catalyst Aerosols

A method for producing a composite sorbent with a honeycomb structure (a system of parallel directed permeable pores) for capturing platinum aerosols in high-temperature catalytic processes is proposed. The composite sorbent is prepared from cordierite ceramics with the addition of active calcium oxide. The calcium oxide precursor is introduced into the molding mass as calcium carbonate powder or by impregnating the matrix material with a solution of calcium nitrate. The mechanism of synthesis of the composite sorbent is investigated. Its physicochemical properties are given. Pilot tests of composite sorbents in an industrial reactor have shown its resistance to technological conditions of ammonia conversion and the ability to capture platinum catalyst aerosols.