Abstract :
g-MnO2 nano-sieve membrane was synthesized using g-MnO2 nanometer powders by suspending particles sintering method.
The results of BET, AFM, and SEM indicate that g-MnO2 nano-sieve membrane with a thickness of about 2 mm is porous (pore
size 4 nm), and has a smooth surface. The results of XRD and TPR exhibit that the phase transformation which can be suppressed
at La/Mn ¼ 0.15, and the activity of oxygen center of g-MnO2 nano-sieve membrane (La/Mn ¼ 0.15) is slightly lower than that
of g-MnO2 nanometer powders. g-MnO2 nano-sieve membrane shows a higher separation factor of H2/Ar in the range of 50–
300 8C. In addition, the g-MnO2 nano-sieve membrane was applied to the membrane reactor for cyclohexane oxidative
dehydrogenation, and the effect of temperature on cyclohexane conversion was investigated. The result shows that cyclohexane
conversion in the g-MnO2 nano-sieve membrane reactor is higher than that in the conventional packed bed reactor
