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  1. boxofnox

    presence of nitrogen in permeate side

    I work in a lab where I am developing membrane based CO2 separation processes. The feed to the membrane is 90%CH4-10%CO2 gas mixture pressurized at 10 atm. The membrane selectively permeates CO2 and some CH4. The permeate side is at atm. pressure and its composition is analyzed using GC by...
  2. boxofnox

    porapak q column for hexane

    Hello: I am not too sure whether my question comes under this forum. I want to analyze hexane, heptane and toluene using porapak q column in my GC fitted with TCD. Does anyone have idea about their typical elution/retention time with porapak q column? Cheers,
  3. boxofnox

    GC sampling under vacuum

    Hello: I am trying to build a membrane based bench-top lab scale facility for measuring gas permeabilities and selectivities for mixed gases (90vol% CH4-10%CO2) by keeping permeate side under vacuum. I intend to analyze these gases at permeate side by GC. Since it will be under vacuum, I am...

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