Hydrogen permeation studies of composite supported alumina-carbon molecular sieves membranes: Separation of diluted hydrogen from mixtures with methane

One alternative for the storage and transport of hydrogen is blending a low amount (up to 15 or 20%) into existing natural gas grids. When demanded, can be then separated, close end users using membranes. In this work, composite alumina carbon molecular sieves membranes (Al-CMSM) supported on tubular porous have been prepared characterized. Single permeation studies showed that H2/CH4 separation properties at 30 °C are well above Robeson limit polymeric H2 H2–CH4 mixture gases, containing 5–20% show purity depends content in feed operating temperature. best scenario investigated samples 10% with an inlet pressure 7.5 bar permeated 0.01 °C, obtained was 99.4%.