Development of SiN based ceramic membrane

Abstract

Hydrogen is mainly made by steam methane-reforming at high temperature. The efficiency of this reaction could be improved by selectively separating out hydrogen from the reactor. We have succeeded in production of molecular sieve membranes starting from Si-N organic precursor, polysilazane. The processing of microporous membranes were carried out by the controlled pyrolysis of polysilazane. High-temperature gas permeation studies were performed using the membranes and H2/N2 selectivity values above 100 were measured.