SELECTIVATION OF ADSORBENTS FOR GAS SEPARATION

摘要

Systems and methods are provided for improving separation of gas phase streams using an adsorbent, such as 8-member ring zeolite adsorbents or DDR type zeolite adsorbents. Suitable gas phase streams can include at least one hydrocarbon, such as methane or a hydrocarbon containing at least one saturated carbon-carbon bond, and at least one additional component, such as CO2 or N2. The selectivity of the adsorbent is improved by selectivating the adsorbent with one or more barrier compounds. The presence of the barrier compounds is believed to alter the relative ability of potential adsorbates to enter into and/or move within the pores of the adsorbent.

主权项

1. A method for performing a gas separation, comprising:
contacting an adsorbent or membrane comprising an 8-member microporous material with a barrier compound under effective conditions to selectivate the adsorbent or membrane, the barrier compound having a minimum dimension of at least about 4.05 Angstroms and a maximum dimension of about 25 Angstroms or less; contacting the selectivated adsorbent or membrane with an input gas stream containing a first component and a second component to form a first gas stream enriched in the first component relative to the input gas stream; and collecting a second gas stream enriched in the second component relative to the input gas stream.