Characteristics of a zirconia composite membrane fabricated by a laser firing method

Abstract By a method of laser firing, a high zirconia containing (70%) composite membrane on porous ceramic tubing was successfully fabricated. The laser sintered composite membrane was characterized by gas separation/permeation experiments. In the separation experiment of a CO 2 CH 4 gaseous mixture, it was found that the separation factor of CH 4 over CO 2 was 1.15. In the pure gases permeation experiment, it was found that Knudsen diffusion is considered to be predominant in the permeation mechanism for pure gases H 2 , He, CH 4 , N 2 , O 2 , and CO 2 , and the permeation mechanism of H 2 O at lower temperature depends mainly on surface diffusion and on Knudsen diffusion at higher temperature.