Issue 6/2021 - High stability hybrid conductor ceramic membrane successfully developed

High-stability hybrid conductor ceramic membrane was successfully developed

Recently, researchers from the Qingdao Institute of Bioenergy and Bioprocess of the Chinese Academy of Sciences have developed a new titanium-based biphasic hybrid conductor oxygen permeable membrane, which can be used as a membrane reactor for hydrogen purification and preparation process
.
This study solves the problem of poor stability of ceramic membrane materials under reducing atmosphere, and promotes the development of
ceramic membrane hydrogen production technology.

Compared with chemically unstable iron-based duplex films, this new titanium-based duplex hybrid conductor oxygen permeable film maintains its original phase structure and micromorphology after 100 hours of treatment under an atmosphere containing water vapor and high concentration of hydrogen, and shows excellent anti-reduction stability
.
The biphasic oxygen permeable membrane has good oxygen permeability under reducing atmosphere, and can be used as a membrane reactor for hydrogen purification and preparation process
.
Driven by the low-purity hydrogen combustion reaction, CO-free hydrogen
can be efficiently obtained on the side of the water decomposition reaction of the membrane reactor.
The experimental results show that the titanium-based duplex film can run stably for a long time, and the membrane material shows good stability
under the actual chemical reaction conditions.

The dense ceramic membrane with oxygen ion-electron hybrid conductivity has 100% selectivity for the transmission of oxygen, coupling the high-temperature water splitting reaction and industrial by-product hydrogen combustion reaction on both sides of the ceramic oxygen permeable membrane reactor, the combustion of low-purity hydrogen can promote the in-situ removal of oxygen generated by water splitting on the other side of the ceramic membrane, so as to efficiently promote water decomposition, directly obtain CO-free hydrogen, which can be used as fuel directly for hydrogen fuel cells
.