Highly efficient recovery of hydrogen from dilute H2-streams using BaCe0.7Zr0.1Y0.2O3-d/Ni-BaCe0.7Zr0.1Y0.2O3-d dual-layer hollow fiber membrane

BaCe0.7Zr0.1Y0.2O3-delta/Ni-BaCe0.7Zr0.1Y0.2O3-delta dual-layer hollow fiber membranes are prepared by a co-spinning/co-sintering method, which is a simple and practical technique to integrate the electrolyte (BaCe0.7Zr0.1Y0.2O3-delta) and the electrode (Ni-BaCe0.7Zr0.1Y0.2O3-delta). A galvanic hydrogen pump is assembled by using this dual-layer hollow fiber membrane for hydrogen separation from dilute H-2 streams, in which the hydrogen permeation can be moderately controlled by the applied voltage. At 550 degrees C and 2 V voltage, a hydrogen flux of 2.15 mL center dot min(-1)center dot cm(-2) and a hydrogen recovery rate of 81% are obtained when the feed is low concentration (13 vol%) H-2 stream. The one-step manufacturing method of integrating electrolytes and electrodes can be regarded as a more efficient method for the mass production of micro-tubular galvanic hydrogen pumps.

Automated summary

BaCe0.7Zr0.1Y0.2O3-delta/Ni-BaCe0.7Zr0.1Y0.2O3-delta dual-layer hollow fiber membranes prepared by a co-spinning/co-sintering method can moderately control hydrogen permeation and achieve high hydrogen recovery rate in low concentration hydrogen streams.