High temperature SrCe0.9Eu0.1O3−δ proton conducting membrane reactor for H2 production using the water–gas shift reaction

The water–gas shift (WGS) reaction is used to shift the CO/H2 ratio prior to Fischer–Tropsch synthesis and/or to increase H2 yield. A WGS membrane reactor was developed using a mixed protonic–electronic conducting SrCe0.9Eu0.1O3−δ membrane coated on a Ni–SrCeO3−δ support. The membrane reactor overcomes the thermodynamic equilibrium limitations. A 46% increase in CO conversion and total H2 yield was achieved at 900 °C under 3% CO and 6% H2O, resulting in a 92% single pass H2 production yield and 32% single pass yield of pure permeated H2.