Method and system for purification of natural gas using membranes
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United States of America Patent
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Dec 29, 2020
Grant Date -
Jun 8, 2017
app pub date -
Dec 2, 2016
filing date -
Dec 3, 2015
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Abstract
Natural gas may be purified by removing C3+ hydrocarbons and CO2 in respective one or more separation units to yield conditioned gas lower in C3+ hydrocarbons and CO2 in comparison to the un-conditioned natural gas. Notably, the feed gas need not be subjected to joule-thomson expansion and molecular sieve dehydration performed by conventional processes. Rather, any water-rich reject stream from the separation unit(s) is dried downstream with a smaller compressor and smaller molecular sieve or gas separation membrane dehydration unit before it may be re-injected deep underground or deep under the sea bed.
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