New high temperature sealing technique and permeability data for hollow fiber BSCF perovskite membranes

Reactive air brazing for sealing mixed ionic electronic conducting hollow fibre membranes

“…O 2 permeation measurements were performed during temperature cycling. The values of the atmospheric nitrogen leak into the argon sweep, remained low as previously reported values for glass-ceramic sealant[16,24] and a separate LSCF/Al 2 O 3 RAB joint (shown in Supplementary material). For very low argon sweep flow rates (20 and 40 ml min À1 ), atmospheric nitrogen leak values for the BCFZ-FeCrAlloy-Al 2 O 3 joint were up to four times higher than those of the LSCF-FeCrAlloy-Al 2 O 3 joint (the highest values not displayed).…”

Mixed Ionic-Electronic Conducting Membranes (MIEC) for Their Application in Membrane Reactors: A Review

“…The first one, used in many membrane reactor works [198,200,202], consists commonly of a specific glass composite applied between membrane and support and can be classified as a non-electronic conductive method (see Figure 15). Different types of glass with some specific modifications depending on the type of oxygen membrane used have been described in the literature [240][241][242]. As reported by Chen et al [243], the main drawback of this technique is the likely pollution of the MIEC membrane, which leads to a decrease in the oxygen permeation through the MIEC material in long-term experiments.…”

Influence of (CoO, CaO, B 2 O 3 ) additives on thermal and dielectric properties of BaO–Al 2 O 3 –SiO 2 glass–ceramic sealant for OTM applications

“…First of all, the huge problem of the sealing between the oxygen membrane and the reactor module is to carry out experimental tests in a safe and leak-free reactor. This aspect has been highlighted as an important improvement objective in the field [1] and [19]. However, detailed discussion on this crucial aspect is often missing in the literature.…”

“…In fact, the sealing of the glass-ceramic with the metallic and ceramic elements, necessary for obtaining a hermetic joint, still remains a critical point in generating a device of oxygen separation from air [1].…”