Effect of Condensable Impurities in CO2/CH4 Gas Feeds on Carbon Molecular Sieve Hollow-Fiber Membranes

摘要: The presence of vapor impurities in gas streams presents problems for both polymeric and carbon materials. For natural processing applications, it is suspected that condensable hydrocarbons can cause significant performance declines polymer membranes. This paper investigates the effect these on molecular sieve (CMS) hollow-fiber Toluene n-heptane were separately used as representative aromatic paraffinic impurities, respectively, 10% CO2/90% CH4 feed streams. Shell-side pressures up to 900 psia temperatures 35 50 °C used. Experimental results reveal CMS membranes maintained CO2/CH4 selectivity with a maximum 20% reduction CO2 permeance during exposure feeds containing comparison “clean” without impurities. Furthermore, simple situ regeneration procedure moderate heating (70−90 °C) dry N2 purge resulted almost c...