Polymer electrolyte membranes containing silver ion for facilitated olefin transport

The concentration effect of solid membranes containing silver polymer electrolytes as olefin carriers for the separation of propylene/propane mixtures was investigated. Solid polymer electrolyte membranes containing silver ions exhibit facilitated transport of propylene. The propylene permeance and its ideal separation factor over propane increased from less than 0.1 GPU to 30 and from ca. 1 to 300, respectively, when the mole ratio of silver to carbonyl group reaches 1. This excellent performance is predominantly attributed to the extraordinary high loading of silver ions in poly(2-ethyl-2-oxazoline) and polyvinyl pyrrolidone solvents.