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Natural gas separation using nitrogen-selective membranes of modest selectivity
Natural gas separation using nitrogen-selective membranes of modest selectivity
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机译:使用选择性中等的氮选择性膜分离天然气
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摘要
A process for treating natural gas or other methane-rich gas to remove excess nitrogen and optionally excess carbon dioxide, water vapor or hydrogen sulfide. The invention relies on gas separation by membranes, using nitrogen/methane selective membranes. The membranes are characterized by having the capability to exhibit a nitrogen/methane selectivity between about 2 and 5 at a temperature higher than about −25° C. The gas may be brought to pipeline specification for nitrogen, and acid gases if present, without requiring the use of amine scrubbing or other acid gas removal technique.
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