α-Al2O3 지지체를 이용한 Pd-Ag-Cu 수소 분리막의 제조 및 기체투과 성능

초록

In this experiment, Pd-Ag-Cu membrane was manufactured using electroless plating on an α-Al2O3 support. Pd, Ag and Cu were each coated on the surface of the support through electroless plating and heat treatment was performedfor 18 h at 500°C in H2 in the middle of electroless plating to form Pd alloy. The surface of the Pd-Ag-Cu membrane wasobserved through Scanning Electron Microscopy (SEM), and the thickness of the Pd membrane was measured to be 7.82μm and the thickness of the Pd-Ag-Cu membrane was measured to be 3.54 μm. Energy dispersive X-ray spectroscopy andX-ray diffraction analysis confirmed the formation of a Pd-Ag-Cu alloy with a composition of Pd-78wt%, Ag-8.81wt% andCu-13.19wt%. The gas permeation experiment was conducted under the conditions of 350~450°C and 1~4 bar in H2 singlegas and H2/N2 mixed gas. The maximum H2 flux of the hydrogen separation membrane measured in H2 single gas is 74.16ml/cm2·min at 450°C and 4 bar for the Pd membrane and 113.64 ml/cm2·min at 450°C and 4 bar for the Pd-Ag-Cumembrane. In the case of the separation factor measured in H2/N2 mixed gas, separation factors of 2437 and 11032 weremeasured at 450°C and 4 bar.

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