Fabrication of a Microtubular La_0.6Sr_0.4Ti_0.2Fe_0.8O_3−δMembrane by Electrophoretic Deposition for Hydrogen Production

Abstract

Microtubular type La0.6Sr0.4Ti0.2Fe0.8O3−δ(LSTF) membranes were prepared by electrophoretic deposition (EPD). The oxygen permeation and hydrogen production behavior of the membranes were investigated under various conditions. LSTF green layer was successfully coated onto a carbon rod and, after heat treatment at 1400°C in air, a dense LSTF tubular membrane with a thickness of 250 mm can be obtained. The oxygen permeation and hydrogen production rate were enhanced by CH4in the permeate side, and the hydrogen production rate by water splitting was 0.22 mL/min·cm2at 1000°C. It is believed that hydrogen production via water splitting using these tubular LSTF membranes is possible.

CFD Simulation of Hydrogen Generation and Methane Combustion Inside a Water Splitting Membrane Reactor

“…The research results of Wang et al [24] and Lee at al. [13] both revealed that, based on the water splitting reaction and oxygen permeation process in a membrane reactor, the hydrogen production rate is twice the oxygen permeation rate:…”

“…If the water splitting reaction is fast enough, then the oxygen permeation process will be the controlling step of the hydrogen production. The studies of Park et al [8] on the La 0.7 Sr 0.3 Cu 0.2 Fe 0.8 O 3-δ (LSCuF−7328) membrane reactor, Hong et al [9] and Habib et al [10] on the La 0.1 Sr 0.9 Co 0.9 Fe 0.1 O 3-δ (LSCoF−1991) membrane reactor, Ben-Mansour et al [11] on the Ba 0.5 Sr 0.5 Co 0.8 Fe 0.2 O x (BSCoF−5582) membrane reactor, Jiang et al [12] on the BaCo x Fe y Zr 1-x-y O 3-δ (BCoFZ) membrane reactor, Lee et al [13] on La 0.6 Sr 0.4 Ti 0.2 Fe 0.8 O 3-δ (LSTF−6428) membrane reactor, and Zhu et al [1] on La 0.9 Ca 0.1 FeO 3-δ (LCF−91) membrane reactor all show that, compared with inert gas, the use of reducing/reacting gas as a sweep gas can improve the oxygen permeability of the membrane reactor, thus leading to a higher hydrogen yield.…”