(258b) Process Intensification through Membrane Separation of Olefins and Paraffins
Compact Membrane Systems (CMS) has developed the OptipermTM membrane, a customized amorphous fluoropolymer (CAF) containing silver ions that selectively transport olefin molecules from a mixture of olefin and paraffin. The technology exploits a reversible complexation reaction mechanism known as facilitated transport. Silver incorporated into the membrane polymer backbone acts as a binding site for the double bond in the olefins transporting them across the membrane as depicted in the cartoon below. Saturated paraffins do not have the same interaction. This difference in affinity allows for olefins to pass through the membrane at a significantly higher rate than do paraffins.
This talk will share the latest field results from both the pilot currently running at the Delaware City Refining Company as well as any results coming out of the RAPID-funded collaboration with Dow Chemical. The DCRC pilot is operating on a stream with a 10-20% concentration of propylene while the Dow Chemical work will focus on higher olefins concentrations of both C2 and C3 streams. This will include performance data, longevity and membrane stability results as well as any learnings from these projects. Thus far, the DCRC pilot has demonstrated over 45 days of stable membrane operation with propylene permeance >75 GPU and selectivity >20 for propylene over propane.