| 초록 |
Palladium based membranes, which are permselective to hydrogen separation, were used for the hydrogen purification for improving conversions by shifting the reaction equilibrium . In this studies, the enhancement effect of H2 production and separation was investigated by adopting the Pd-membrane at the top of the fluidized-bed WGS reactor. At the preliminary test, the separation capability of H2(Pure), binary mixtures of H2/CO2(60/40%) and a ternary mixture of H2/CO/CO2 (40/40/20%) was measured with the composite membrane at 300 oC and 2∼3 bar. As a result, H2 permeation inhibition was observed due to the presence of both CO and CO2 in the mixtures. The operation conditions of WGS/membrane hybrid system were 250∼400 oC and 2∼3 bar, H2O/Carbon(S/C) ratios were between 1 and 2.5. A maximum CO conversion of 94.5 % was achieved at S/C=2.5, 300 oC and 2.5 bar. CO conversion using Pd based membrane reactor at an appropriate condition was over 10∼15 % greater than that without the membrane reactor. |
