A METHOD FOR IMPROVING POLYIMIDE HOLLOW FIBER MEMBRANE
A method of reforming a polyimide hollow fiber membrane and a polyimide hollow fiber membrane reformed by the method are provided, wherein the reformed polyimide hollow fiber membrane has an effect of recovering CH4 with a high purity by improving selectivity of CO2/CH4 of biogas, thereby removing C...
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| creator | CHUNG, WOOK JIN PARK, SHIN JUNG CHO, EUL SAENG SIM, EUN YONG ERLI EROS LEE ARNEL B. BELTRAN PARK, JOON SEOK NAMKUNG, EUN ANDREW PREMACIO VIAVA JANE AFRICA GRACE NISOLA KIM, YE KYUNG JEE, CHAN KYU |
| description | A method of reforming a polyimide hollow fiber membrane and a polyimide hollow fiber membrane reformed by the method are provided, wherein the reformed polyimide hollow fiber membrane has an effect of recovering CH4 with a high purity by improving selectivity of CO2/CH4 of biogas, thereby removing CO2 from the biogas. A method of reforming a polyimide hollow fiber membrane comprises the steps of: submerging a polyimide hollow fiber membrane into a cross-linking agent to cross-link the polyimide hollow fiber membrane; and annealing the cross-linked polyimide hollow fiber membrane. The cross-linking agent is a mixture of N-(1-naphthyl)ethylenediamine and dihydrochloride. A reformed polyimide hollow fiber membrane for the separation of CO2 gas from biogas is characterized in that a polyimide hollow fiber membrane that has been reformed and annealed by the method has a CO2/CH4 selectivity range of 62 to 106 according to an annealing temperature of the membrane which has been increased as high as approximately 50% as compared to that of a non-reformed polyimide hollow fiber membrane, and a polyimide hollow fiber membrane that has been reformed by cross-linking and annealing has a CO2/CH4 selectivity range of 112 to 188 which has been incrased according to the annealing temperature of the polyimide hollow fiber membrane. |
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The cross-linking agent is a mixture of N-(1-naphthyl)ethylenediamine and dihydrochloride. A reformed polyimide hollow fiber membrane for the separation of CO2 gas from biogas is characterized in that a polyimide hollow fiber membrane that has been reformed and annealed by the method has a CO2/CH4 selectivity range of 62 to 106 according to an annealing temperature of the membrane which has been increased as high as approximately 50% as compared to that of a non-reformed polyimide hollow fiber membrane, and a polyimide hollow fiber membrane that has been reformed by cross-linking and annealing has a CO2/CH4 selectivity range of 112 to 188 which has been incrased according to the annealing temperature of the polyimide hollow fiber membrane.</description><language>eng ; kor</language><subject>PERFORMING OPERATIONS ; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL ; SEPARATION ; TRANSPORTING</subject><creationdate>2009</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=20090724&DB=EPODOC&CC=KR&NR=20090080255A$$EHTML$$P50$$Gepo$$Hfree_for_read</linktohtml><link.rule.ids>230,308,778,883,25551,76302</link.rule.ids><linktorsrc>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=20090724&DB=EPODOC&CC=KR&NR=20090080255A$$EView_record_in_European_Patent_Office$$FView_record_in_$$GEuropean_Patent_Office$$Hfree_for_read</linktorsrc></links><search><creatorcontrib>CHUNG, WOOK JIN</creatorcontrib><creatorcontrib>PARK, SHIN JUNG</creatorcontrib><creatorcontrib>CHO, EUL SAENG</creatorcontrib><creatorcontrib>SIM, EUN YONG</creatorcontrib><creatorcontrib>ERLI EROS LEE</creatorcontrib><creatorcontrib>ARNEL B. 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A method of reforming a polyimide hollow fiber membrane comprises the steps of: submerging a polyimide hollow fiber membrane into a cross-linking agent to cross-link the polyimide hollow fiber membrane; and annealing the cross-linked polyimide hollow fiber membrane. The cross-linking agent is a mixture of N-(1-naphthyl)ethylenediamine and dihydrochloride. A reformed polyimide hollow fiber membrane for the separation of CO2 gas from biogas is characterized in that a polyimide hollow fiber membrane that has been reformed and annealed by the method has a CO2/CH4 selectivity range of 62 to 106 according to an annealing temperature of the membrane which has been increased as high as approximately 50% as compared to that of a non-reformed polyimide hollow fiber membrane, and a polyimide hollow fiber membrane that has been reformed by cross-linking and annealing has a CO2/CH4 selectivity range of 112 to 188 which has been incrased according to the annealing temperature of the polyimide hollow fiber membrane.</description><subject>PERFORMING OPERATIONS</subject><subject>PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL</subject><subject>SEPARATION</subject><subject>TRANSPORTING</subject><fulltext>true</fulltext><rsrctype>patent</rsrctype><creationdate>2009</creationdate><recordtype>patent</recordtype><sourceid>EVB</sourceid><recordid>eNrjZDBzVPB1DfHwd1Fw8w9S8PQNCPIP8_RzVwjw94n09PV0cVXw8Pfx8Q9XcPN0cg0CqvV1CnL0c-VhYE1LzClO5YXS3AzKbq4hzh66qQX58anFBYnJqXmpJfHeQUYGBpYGBhYGRqamjsbEqQIApF8oqw</recordid><startdate>20090724</startdate><enddate>20090724</enddate><creator>CHUNG, WOOK JIN</creator><creator>PARK, SHIN JUNG</creator><creator>CHO, EUL SAENG</creator><creator>SIM, EUN YONG</creator><creator>ERLI EROS LEE</creator><creator>ARNEL B. 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BELTRAN</au><au>PARK, JOON SEOK</au><au>NAMKUNG, EUN</au><au>ANDREW PREMACIO</au><au>VIAVA JANE AFRICA</au><au>GRACE NISOLA</au><au>KIM, YE KYUNG</au><au>JEE, CHAN KYU</au><format>patent</format><genre>patent</genre><ristype>GEN</ristype><title>A METHOD FOR IMPROVING POLYIMIDE HOLLOW FIBER MEMBRANE</title><date>2009-07-24</date><risdate>2009</risdate><abstract>A method of reforming a polyimide hollow fiber membrane and a polyimide hollow fiber membrane reformed by the method are provided, wherein the reformed polyimide hollow fiber membrane has an effect of recovering CH4 with a high purity by improving selectivity of CO2/CH4 of biogas, thereby removing CO2 from the biogas. A method of reforming a polyimide hollow fiber membrane comprises the steps of: submerging a polyimide hollow fiber membrane into a cross-linking agent to cross-link the polyimide hollow fiber membrane; and annealing the cross-linked polyimide hollow fiber membrane. The cross-linking agent is a mixture of N-(1-naphthyl)ethylenediamine and dihydrochloride. A reformed polyimide hollow fiber membrane for the separation of CO2 gas from biogas is characterized in that a polyimide hollow fiber membrane that has been reformed and annealed by the method has a CO2/CH4 selectivity range of 62 to 106 according to an annealing temperature of the membrane which has been increased as high as approximately 50% as compared to that of a non-reformed polyimide hollow fiber membrane, and a polyimide hollow fiber membrane that has been reformed by cross-linking and annealing has a CO2/CH4 selectivity range of 112 to 188 which has been incrased according to the annealing temperature of the polyimide hollow fiber membrane.</abstract><oa>free_for_read</oa></addata></record> |
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| title | A METHOD FOR IMPROVING POLYIMIDE HOLLOW FIBER MEMBRANE |
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