Helium separation through polymeric membranes: selectivity targets Current membranes' selectivity can recovery helium from the NRU exit gas Membranes are suited for 90% purification stage, based on energy duty comparison Gas separation membranes have the potential to recovery and purify helium from natural gas
Helium separation using membrane technology: Recent advances and . . . By varying SiO 2 amount and polyimide types, CMS membranes with a helium permeability of up to 6300 Barrer were obtained with moderate ideal He CH 4 selectivity It suggests a new methodology of incorporating porous fillers into CMS matrices to improve gas permeability and selectivity
Polyimide Membrane Materials with Multiple Trifluoromethyl . . . Membrane technology, especially the options using highly selective and permeable materials, is the preferred alternative to conduct direct helium enrichment from natural gas In this work, the monomers containing multiple trifluoromethyl groups, including 4,4′-(hexafluoroisopropylidene) diphthalic anhydride (6FDA) and 2,2′-bis
Review of helium separation from natural gas by membranes In mixed-gas separation tests, the membrane maintained outstanding performance, with a helium permeability of 1765 Barrer and a He CH₄ selectivity of 4114 at 20 bar The significant enhancement in selectivity was attributed to increased diffusion selectivity, driven by the formation of C–F bonds within the micropores, which improved the
Polymer materials for solving actual problems of membrane gas separation Membrane gas separation using polymeric membranes is one of rapidly developing energy-conserving technologies This review describes the scope of membrane gas separation problems and demonstrates the relevance of membrane methods for their solu-tion The basic concepts and regularities of diffusion gas transfer
Optimal design of non-phase change integration process for helium . . . The PI glassy polymer membrane exhibited good permeability and selectivity for helium extraction from natural gas In the process optimization analysis, the PI membrane was used to study the effect of recovery on the process
Permeability of Hollow Microspherical Membranes to Helium Specially treated cenospheres have displayed high efficiency as membranes for selective extraction of helium This work is devoted to the study of the sorption characteristics of various hollow microspherical membranes to reveal particles most suitable for applicat
SEPURAN® Noble Membrane I Efficient helium recovery Evonik's SEPURAN® Noble membrane has been especially developed for helium recovery and purification enabling highly pure helium to be efficiently produced even when inlet concentrations of helium are very low