{"id":{"repo_id":"njit","oai_identifier":"oai:digitalcommons.njit.edu:dissertations-1618"},"canonical_url":"https://search.dev.ndltd.org/etd/njit/oai:digitalcommons.njit.edu:dissertations-1618","repository":{"repo_id":"njit","name":"NJIT","base_url":"https://digitalcommons.njit.edu/do/oai/"},"display":{"title":"Study of vapor/gas permeation using thin immobilized liquid membrane","abstract":"To improve liquid membrane selectivity and stability for removal of vapor and gases from a gas stream, a thin immobilized liquid membrane (ILM) has been studied. Low vapor pressure liquid solvent/solutions were immobilized in part of the micropores of a hydrophilic, hydrophobic or ceramic hollow fiber substrate. To prepare such thin ILMs, three approaches were used: evaporation of the a volatile solvent; acrylic acid-grafted hollow fibers providing a thin hydrophilic layer; pressurization technique. For removal of volatile organic compound (VOC), a thin ILM of silicone oil incorporated in the micropores of a hydrophobic hollow fiber with a silicone rubber coating yielded a highly VOC-enriched permeate and increased separation factor. The same ILM was stable over an extended period (6 months - 2 years) demonstrating the potential utility of such an ILM-based hollow fiber device for VOC-N_2/air separation. A mathematical model was successfully developed to describe the VOC-N_2 permeation-separation in a hollow fiber permeator having this special type of membrane containing a thin ILM. Grafting method used for the preparation of a thinner ILM resulted in various hollow fibers having different hydrophilic layer thickness. These fibers were used to study the effect of various glycerol-based and aqueous liquid membranes immobilized in the thin hydrophilized part of the fiber. Glycerol-based ILMs resulted in low CO_2 permeances in the range of 1*10^{-6} cm^3/cm^2*s*cmHg for enclosed atmosphere application; aqueous based ILMs has much better performance. A pressurization technique was used to prepare a thin ILM in porous hydrophilic and ceramic substrates. It was shown that when appropriate asymmetric hollow fibers substrates were used, increase in CO_2 permeance was achieved.","abstract_html":"To improve liquid membrane selectivity and stability for removal of vapor and gases from a gas stream, a thin immobilized liquid membrane (ILM) has been studied. Low vapor pressure liquid solvent/solutions were immobilized in part of the micropores of a hydrophilic, hydrophobic or ceramic hollow fiber substrate. To prepare such thin ILMs, three approaches were used: evaporation of the a volatile solvent; acrylic acid-grafted hollow fibers providing a thin hydrophilic layer; pressurization technique. For removal of volatile organic compound (VOC), a thin ILM of silicone oil incorporated in the micropores of a hydrophobic hollow fiber with a silicone rubber coating yielded a highly VOC-enriched permeate and increased separation factor. The same ILM was stable over an extended period (6 months - 2 years) demonstrating the potential utility of such an ILM-based hollow fiber device for VOC-N_2/air separation. A mathematical model was successfully developed to describe the VOC-N_2 permeation-separation in a hollow fiber permeator having this special type of membrane containing a thin ILM. Grafting method used for the preparation of a thinner ILM resulted in various hollow fibers having different hydrophilic layer thickness. These fibers were used to study the effect of various glycerol-based and aqueous liquid membranes immobilized in the thin hydrophilized part of the fiber. Glycerol-based ILMs resulted in low CO_2 permeances in the range of 1*10^{-6} cm^3/cm^2*s*cmHg for enclosed atmosphere application; aqueous based ILMs has much better performance. A pressurization technique was used to prepare a thin ILM in porous hydrophilic and ceramic substrates. It was shown that when appropriate asymmetric hollow fibers substrates were used, increase in CO_2 permeance was achieved.","abstract_has_math":false,"creators":["Obuskovic, Gordana"],"institution":null,"degree_name":"Doctor of Philosophy in Chemical Engineering - (Ph.D.)","degree_level":null,"degree_discipline":"Chemical Engineering","degree_department":null,"school":null,"contributors":["Kamalesh K. Sirkar","Piero M. Armenante","Dana E. Knox"],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2003,"date_issued":"2003-01-31T08:00:00Z","date_published":"2003-01-31T08:00:00Z","updated_at":"2026-07-24T03:22:52Z","subjects":["Immobilized liquid membrane","Vapor permeation","Gas permeation","Chemical Engineering"],"languages":[],"rights":[],"rights_urls":[],"identifier_entries":[]},"links":{"outbound_url":"https://digitalcommons.njit.edu/dissertations/563","outbound_label":"Repository record","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor","label":"Contributor","values":["Kamalesh K. Sirkar","Piero M. Armenante","Dana E. 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Low vapor pressure liquid solvent/solutions were immobilized in part of the micropores of a hydrophilic, hydrophobic or ceramic hollow fiber substrate. To prepare such thin ILMs, three approaches were used: evaporation of the a volatile solvent; acrylic acid-grafted hollow fibers providing a thin hydrophilic layer; pressurization technique. For removal of volatile organic compound (VOC), a thin ILM of silicone oil incorporated in the micropores of a hydrophobic hollow fiber with a silicone rubber coating yielded a highly VOC-enriched permeate and increased separation factor. The same ILM was stable over an extended period (6 months - 2 years) demonstrating the potential utility of such an ILM-based hollow fiber device for VOC-N_2/air separation. A mathematical model was successfully developed to describe the VOC-N_2 permeation-separation in a hollow fiber permeator having this special type of membrane containing a thin ILM. Grafting method used for the preparation of a thinner ILM resulted in various hollow fibers having different hydrophilic layer thickness. These fibers were used to study the effect of various glycerol-based and aqueous liquid membranes immobilized in the thin hydrophilized part of the fiber. Glycerol-based ILMs resulted in low CO_2 permeances in the range of 1*10^{-6} cm^3/cm^2*s*cmHg for enclosed atmosphere application; aqueous based ILMs has much better performance. A pressurization technique was used to prepare a thin ILM in porous hydrophilic and ceramic substrates. It was shown that when appropriate asymmetric hollow fibers substrates were used, increase in CO_2 permeance was achieved."]},{"key":"dc:title","label":"Title","values":["Study of vapor/gas permeation using thin immobilized liquid membrane"]}]}],"canonical_facts":{"dc:contributor":["Kamalesh K. Sirkar","Piero M. Armenante","Dana E. Knox"],"dc:creator":["Obuskovic, Gordana"],"dc:description.abstract":["To improve liquid membrane selectivity and stability for removal of vapor and gases from a gas stream, a thin immobilized liquid membrane (ILM) has been studied. Low vapor pressure liquid solvent/solutions were immobilized in part of the micropores of a hydrophilic, hydrophobic or ceramic hollow fiber substrate. To prepare such thin ILMs, three approaches were used: evaporation of the a volatile solvent; acrylic acid-grafted hollow fibers providing a thin hydrophilic layer; pressurization technique. For removal of volatile organic compound (VOC), a thin ILM of silicone oil incorporated in the micropores of a hydrophobic hollow fiber with a silicone rubber coating yielded a highly VOC-enriched permeate and increased separation factor. The same ILM was stable over an extended period (6 months - 2 years) demonstrating the potential utility of such an ILM-based hollow fiber device for VOC-N_2/air separation. A mathematical model was successfully developed to describe the VOC-N_2 permeation-separation in a hollow fiber permeator having this special type of membrane containing a thin ILM. Grafting method used for the preparation of a thinner ILM resulted in various hollow fibers having different hydrophilic layer thickness. These fibers were used to study the effect of various glycerol-based and aqueous liquid membranes immobilized in the thin hydrophilized part of the fiber. Glycerol-based ILMs resulted in low CO_2 permeances in the range of 1*10^{-6} cm^3/cm^2*s*cmHg for enclosed atmosphere application; aqueous based ILMs has much better performance. A pressurization technique was used to prepare a thin ILM in porous hydrophilic and ceramic substrates. It was shown that when appropriate asymmetric hollow fibers substrates were used, increase in CO_2 permeance was achieved."],"dc:identifier":["https://digitalcommons.njit.edu/dissertations/563"],"dc:subject":["Immobilized liquid membrane","Vapor permeation","Gas permeation","Chemical Engineering"],"dc:title":["Study of vapor/gas permeation using thin immobilized liquid membrane"],"dc:type":["Dissertation"],"thesis:degree_discipline":["Chemical Engineering"],"thesis:degree_name":["Doctor of Philosophy in Chemical Engineering - (Ph.D.)"]},"updated_at":"2026-07-24T03:22:52Z"}