| 摘要 |
A natural gas stream derived from a landfill and containing impurities including siloxane impurities is purified by a PSA process to produce a methane-rich product stream which is substantially free of siloxane impurities. A methane-rich vent stream having a pressure less than the product stream is formed that is also free of siloxanes and can be used as a fuel stream to run a compressor for the PSA process.
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