| Abstract: | A Ni-P amorphous alloy/ceramic membrane with high selectivity and permeability for hydrogen was prepared by a novel technique
of local electroless Ni-plating with metal-activated paste. The separation factor obtained is higher for H2/Ar compared with γ-Al2O3/ceramic composite membrane. In addition, two kinds of Ni-P alloy/ceramic composite membranes, as-prepared and crystallized
ones, were applied to the membrane reactor of ethanol dehydrogenation, and the effect of the reaction temperature, argon sweeping
rate and space time on ethanol conversion and yield of acetaldehyde was investigated. The results demonstrated that ethanol
conversion in an as-prepared Ni-P amorphous alloy membrane reactor was significantly higher than that in a Ni-P alloy membrane
reactor after crystallization, owing to an original structure of as-prepared Ni-P membrane. Meanwhile, the morphology of the
membrane was observed by SEM. The crystallized process of non-supported Ni-P alloy membrane was detected by XRD. The surface
composition and valence state of the membrane before and after reaction was investigated by XPS.
This revised version was published online in July 2006 with corrections to the Cover Date. |
