Metallic sealants increase flux and change selectivity in supported molten-salt membranes

Abstract

Metallic sealants are widely used with high-temperature membranes. Here we show that their use in supported molten-salt membranes results in order-of-magnitude differences in CO₂ flux and introduces O₂ co-permeation. The ‘short-circuiting’ effect they introduce has important implications for the design of future experiments, and the interpretation of past work.