Process for reliquefying a methane-rich fraction
A process for reliquefying a methane-rich fraction, especially boil-off gas, is described. In this process, a) the methane-rich fraction (1) is compressed (C1) to a pressure at least 20% above the critical pressure of the fraction to be compressed, b) liquefied and subcooled (E2), c) decompressed (V...
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| creator | Bauer, Heinz Franke, Hubert Bub, Andreas |
| description | A process for reliquefying a methane-rich fraction, especially boil-off gas, is described. In this process, a) the methane-rich fraction (1) is compressed (C1) to a pressure at least 20% above the critical pressure of the fraction to be compressed, b) liquefied and subcooled (E2), c) decompressed (V1) to a pressure between 5 and 20 bar, and d) separated into a gaseous nitrogen-rich (4) and a liquid nitrogen-depleted fraction (7), and e) the nitrogen-depleted fraction (7) is decompressed (V2) to a pressure between 1.1 and 2.0 bar, f) wherein the gaseous fraction (8) obtained is added to the methane-rich fraction (1) without being warmed up and compressed, and g) the liquid product fraction (9) which is obtained in the decompression of the low-nitrogen fraction has a nitrogen content of ≤ 1.5 mol%. |
| format | Patent |
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In this process, a) the methane-rich fraction (1) is compressed (C1) to a pressure at least 20% above the critical pressure of the fraction to be compressed, b) liquefied and subcooled (E2), c) decompressed (V1) to a pressure between 5 and 20 bar, and d) separated into a gaseous nitrogen-rich (4) and a liquid nitrogen-depleted fraction (7), and e) the nitrogen-depleted fraction (7) is decompressed (V2) to a pressure between 1.1 and 2.0 bar, f) wherein the gaseous fraction (8) obtained is added to the methane-rich fraction (1) without being warmed up and compressed, and g) the liquid product fraction (9) which is obtained in the decompression of the low-nitrogen fraction has a nitrogen content of ≤ 1.5 mol%.</description><language>eng</language><subject>ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE ORUNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL ; BLASTING ; CHEMISTRY ; COMBINED HEATING AND REFRIGERATION SYSTEMS ; FIRELIGHTERS ; FUELS ; FUELS NOT OTHERWISE PROVIDED FOR ; HEAT PUMP SYSTEMS ; HEATING ; LIGHTING ; LIQUEFACTION SOLIDIFICATION OF GASES ; LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS ; LIQUEFIED PETROLEUM GAS ; LUBRICANTS ; MANUFACTURE OR STORAGE OF ICE ; MECHANICAL ENGINEERING ; METALLURGY ; MIXTURES BY PRESSURE AND COLD TREATMENT ; NATURAL GAS ; PEAT ; PETROLEUM, GAS OR COKE INDUSTRIES ; REFRIGERATION OR COOLING ; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BYSUBCLASSES C10G, C10K ; TECHNICAL GASES CONTAINING CARBON MONOXIDE ; WEAPONS</subject><creationdate>2017</creationdate><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=20170413&DB=EPODOC&CC=AU&NR=2013257026B2$$EHTML$$P50$$Gepo$$Hfree_for_read</linktohtml><link.rule.ids>230,308,776,881,25542,76289</link.rule.ids><linktorsrc>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=20170413&DB=EPODOC&CC=AU&NR=2013257026B2$$EView_record_in_European_Patent_Office$$FView_record_in_$$GEuropean_Patent_Office$$Hfree_for_read</linktorsrc></links><search><creatorcontrib>Bauer, Heinz</creatorcontrib><creatorcontrib>Franke, Hubert</creatorcontrib><creatorcontrib>Bub, Andreas</creatorcontrib><title>Process for reliquefying a methane-rich fraction</title><description>A process for reliquefying a methane-rich fraction, especially boil-off gas, is described. 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In this process, a) the methane-rich fraction (1) is compressed (C1) to a pressure at least 20% above the critical pressure of the fraction to be compressed, b) liquefied and subcooled (E2), c) decompressed (V1) to a pressure between 5 and 20 bar, and d) separated into a gaseous nitrogen-rich (4) and a liquid nitrogen-depleted fraction (7), and e) the nitrogen-depleted fraction (7) is decompressed (V2) to a pressure between 1.1 and 2.0 bar, f) wherein the gaseous fraction (8) obtained is added to the methane-rich fraction (1) without being warmed up and compressed, and g) the liquid product fraction (9) which is obtained in the decompression of the low-nitrogen fraction has a nitrogen content of ≤ 1.5 mol%.</abstract><oa>free_for_read</oa></addata></record> |
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| subjects | ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE ORUNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL BLASTING CHEMISTRY COMBINED HEATING AND REFRIGERATION SYSTEMS FIRELIGHTERS FUELS FUELS NOT OTHERWISE PROVIDED FOR HEAT PUMP SYSTEMS HEATING LIGHTING LIQUEFACTION SOLIDIFICATION OF GASES LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS LIQUEFIED PETROLEUM GAS LUBRICANTS MANUFACTURE OR STORAGE OF ICE MECHANICAL ENGINEERING METALLURGY MIXTURES BY PRESSURE AND COLD TREATMENT NATURAL GAS PEAT PETROLEUM, GAS OR COKE INDUSTRIES REFRIGERATION OR COOLING SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BYSUBCLASSES C10G, C10K TECHNICAL GASES CONTAINING CARBON MONOXIDE WEAPONS |
| title | Process for reliquefying a methane-rich fraction |
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