Gas separation systems and methods using membranes

摘要

A gas separation method includes contacting a membrane filter with gas feed, permeating the gas from the gas feed through the membrane, and producing filtered gas from the filter. The filtered gas is produced from the filter as a result of the membrane removing any hydrocarbons containing six or more carbon atoms to produce a total of 0.001 ppm w/w or less. A gas separation method includes feeding gas into a filter containing a hollow fiber membrane that exhibits the property of resisting degradation due to exposure to hydrocarbons containing six or more carbon atoms. The filter exhibits a pressure drop across the membrane of less than 5 psi. The method includes feeding the filtered gas into a gas separation module that exhibits a susceptibility to degradation from exposure to hydrocarbons containing six or more carbon atoms.

主权项

1. A gas separation method comprising:
feeding a pressurized gas feed into a filter containing a membrane, contaminants in the pressurized gas including hydrocarbons containing six or more carbon atoms; contacting the membrane with the gas feed, permeating the gas from the gas feed through the membrane, and producing filtered gas from the filter as a result of the membrane removing any hydrocarbons containing six or more carbon atoms to produce a total of 0.001 ppm w/w or less, the filter exhibiting a pressure drop across the membrane of less than 5 pounds/inch2 (psi); and feeding the filtered gas into a gas separation module and producing gas enriched in a component of the gas feed from the gas separation module.