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

Experimentally validated numerical modeling of Eu doped SrCeO3membrane for hydrogen separation

“…In an experimental study carried out by Oh et al [8], it was shown that SrEu 0.1 Ce 0.9 O 3Àd (10ESC)is a suitable candidate for hydrogen permeation membrane, this study also showed that the total conductivity, ambipolar conductivity and conductivities of electrons and protons all increase with temperature in humidified and dry hydrogen. Moreover, it was observed from the results of Li et al [5], that when the membrane is exposed to syngas, because of simultaneous hydrogen removal (permeation through membrane) and production (due to Water Gas Shift (WGS) reaction), the rate of hydrogen production increased with the temperature, which is a contradicting phenomenon from the perspective of thermodynamics. Further to increase the thermodynamic stability of 10ESC, Zirconium is added to develop SrZ 0.2 Ce 0.8Àx Eu x O 3Àd (SCEZ) [9].…”

“…Researchers are focusing on the efficiency and cost effectiveness of methods to produce hydrogen such as the coal and biomass gasification, steam reforming of methane, electrolysis, and solar thermoechemical cycles [1e4]. In the gasification process, high temperature, proton conducting ceramic membranes can be used to separate hydrogen from gasification off gases and to enhance hydrogen yields through the water gas shift reaction at high temperatures, which also avoids issues with the cooling [5]. Due to their very high selectivity for hydrogen and cost effectiveness, they are one of the most promising options [6].…”

Carbon dioxide reforming of methane in a SrCe0.7Zr0.2Eu0.1O3− proton conducting membrane reactor

“…The effect of the membrane was investigated by comparing CO 2 and CH 4 conversion and H 2 production under two reactor configurations [34]: (1) with just Ni catalyst and (2) with Ni catalyst and in-situ H 2 removal. In configuration (1), the permeate side was blocked, no sweep gas was used or H 2 removed.…”

WGS Reaction in Membrane Reactors

“…Li et al [38] first time ever reported mixed protonic-electronic conducting SrCe 0.9 Eu 0.1 O 3Àδ membrane coated on a Ni-SrCeO 3Àδ support. They prepared membrane by conventional solid-state reaction by mixing stoichiometric amounts of SrCO 3 , CeO 2 and Eu 2 O 3 powders, followed by ball milling and calcining at 1300°C.…”