烯烃

Development of Composite Hollow Fiber Membranes for Olefin Off-gas Recoverypolydimethylsiloxane;composite hollow fiber;olefin;condensable gases;In this study, composite hollow fiber membranes were developed for the recovery of olefin monomers in polyolefin industry off-gases. Polyetherimide (PEI) hollow fiber support membranes were fabricated from spinning solutions containing PEI, NMP and polyethylene glycol (PEG). The influence of dope solution and inner coagulant composition on the permeation properties and structure of hollow fiber supports was examined.

Permeation Behavior of Olefin/Nitrogen Gases through Siloxane based Polymeric MembranesPolydimethylsiloxane;Olefin;Nitrogen;Off-gas;Membrane;For the olefin recovery from polyolefin off-gas, the permeation behaviors of olefins and nitrogen were investigated through three kinds of PDMS membranes - cross-linked PDMS membranes, a polysiloxaneimide membrane, and oligo-PDMS modified PDMS membranes.