{"id":{"repo_id":"buffalo","oai_identifier":"oai:ubir.buffalo.edu:10477/80055"},"canonical_url":"https://search.dev.ndltd.org/etd/buffalo/oai:ubir.buffalo.edu:10477/80055","repository":{"repo_id":"buffalo","name":"Buffalo","base_url":"https://ubir.buffalo.edu/oai/request"},"display":{"title":"Fundamental Study of Free Volume Characteristics on Membrane H2/CO2 Separation","abstract":"Ph.D.","abstract_html":"Ph.D.","abstract_has_math":false,"creators":["Omidvarkordshouli, Maryam"],"institution":"State University of New York at Buffalo","degree_name":null,"degree_level":null,"degree_discipline":null,"degree_department":null,"school":null,"contributors":["Lin, Haiqing","Chemical and Biological Engineering"],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2019,"date_issued":"2019-07-30T15:12:09Z","date_published":"2019-07-30T15:12:09Z","updated_at":"2026-07-27T19:05:23Z","subjects":["engineering","environmental engineering"],"languages":["eng"],"rights":["Users of works found in University at Buffalo Institutional Repository (UBIR) are responsible for identifying and contacting the copyright owner for permission to reuse. University at Buffalo Libraries do not manage rights for copyright-protected works and cannot assist with permissions.","Copyright retained by author."],"rights_urls":[],"identifier_entries":[]},"links":{"outbound_url":"http://hdl.handle.net/10477/80055","outbound_label":"Handle","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor","label":"Contributor","values":["Lin, Haiqing","Chemical and Biological Engineering"]},{"key":"dc:creator","label":"Author","values":["Omidvarkordshouli, Maryam"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date","label":"Dc Date","values":["2019-07-30T15:12:09Z","2019","2019-05-22 13:41:11"]},{"key":"dc:publisher","label":"Institution","values":["State University of New York at Buffalo"]},{"key":"dc:type","label":"Dc Type","values":["Text","Dissertation"]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["engineering","environmental engineering"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language","label":"Dc Language","values":["eng"]},{"key":"dc:rights","label":"Dc Rights","values":["Users of works found in University at Buffalo Institutional Repository (UBIR) are responsible for identifying and contacting the copyright owner for permission to reuse. University at Buffalo Libraries do not manage rights for copyright-protected works and cannot assist with permissions.","Copyright retained by author."]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["http://hdl.handle.net/10477/80055"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description","label":"Description","values":["Ph.D.","As one of the basic chemicals and green energy sources, hydrogen (H2) is mainly produced from fossil fuels via steam reforming or gasification with carbon dioxide (CO2) as a byproduct. The CO2 must be removed for the H2 to be used, and with a low-cost and energy-efficient H2/CO2 separation technology, the CO2 can be captured for sequestration or utilization. With inherently high energy-efficiency, membrane technology has been extensively investigated for H2/CO2 separation. The key to the success of this technology is membrane materials with high H2 permeability and H2/CO2 selectivity (preferably above 15) at syngas processing temperatures of 100 – 300C. Solubility and diffusivity can be independently tuned to design high-performance membrane materials. The under-valued solubility and solubility selectivity are powerful tools for designing materials with superior separation properties. Chapter 2nd highlights recent achievements of sorption-enhanced materials with superior gas separation performance, including fluorinated polymers for He/gas and gas/CH4 separations, and polar polymers and mixed-matrix materials comprising metal-organic frameworks for olefin/paraffin separations. On the other hand, Diffusivity selectivity is governed by the relative molecular size of penetrants to be separated and the free volume of membrane materials and it has received great attention, yielding a wealth of size-sieving materials reported in the literature. Cross-linking has been extensively utilized to improve Diffusivity selectivity of materials and enhance the separation properties for important industrial gas separations such as H2/CO2, CO2/CH4, and C3H6/C3H8 separations. However, it remains unexplored how the cross-linking influences the physical properties of the polyimides such as Tg, FFV and gas permeability. Chapter 3 critically reviews the strategies utilized to chemically cross-link polyimides (including the reaction via imide rings or DABA functional groups) and the gas separation properties in the resulted polymer networks.","**To request an accessible version of the file(s) associated with this item, contact library@buffalo.edu. Please include the item's persistent URL [http://hdl.handle.net/. . .] in your request.**"]},{"key":"dc:format","label":"Dc Format","values":["application/pdf"]},{"key":"dc:title","label":"Title","values":["Fundamental Study of Free Volume Characteristics on Membrane H2/CO2 Separation"]}]}],"canonical_facts":{"dc:contributor":["Lin, Haiqing","Chemical and Biological Engineering"],"dc:creator":["Omidvarkordshouli, Maryam"],"dc:date":["2019-07-30T15:12:09Z","2019","2019-05-22 13:41:11"],"dc:description":["Ph.D.","As one of the basic chemicals and green energy sources, hydrogen (H2) is mainly produced from fossil fuels via steam reforming or gasification with carbon dioxide (CO2) as a byproduct. The CO2 must be removed for the H2 to be used, and with a low-cost and energy-efficient H2/CO2 separation technology, the CO2 can be captured for sequestration or utilization. With inherently high energy-efficiency, membrane technology has been extensively investigated for H2/CO2 separation. The key to the success of this technology is membrane materials with high H2 permeability and H2/CO2 selectivity (preferably above 15) at syngas processing temperatures of 100 – 300C. Solubility and diffusivity can be independently tuned to design high-performance membrane materials. The under-valued solubility and solubility selectivity are powerful tools for designing materials with superior separation properties. Chapter 2nd highlights recent achievements of sorption-enhanced materials with superior gas separation performance, including fluorinated polymers for He/gas and gas/CH4 separations, and polar polymers and mixed-matrix materials comprising metal-organic frameworks for olefin/paraffin separations. On the other hand, Diffusivity selectivity is governed by the relative molecular size of penetrants to be separated and the free volume of membrane materials and it has received great attention, yielding a wealth of size-sieving materials reported in the literature. Cross-linking has been extensively utilized to improve Diffusivity selectivity of materials and enhance the separation properties for important industrial gas separations such as H2/CO2, CO2/CH4, and C3H6/C3H8 separations. However, it remains unexplored how the cross-linking influences the physical properties of the polyimides such as Tg, FFV and gas permeability. Chapter 3 critically reviews the strategies utilized to chemically cross-link polyimides (including the reaction via imide rings or DABA functional groups) and the gas separation properties in the resulted polymer networks.","**To request an accessible version of the file(s) associated with this item, contact library@buffalo.edu. Please include the item's persistent URL [http://hdl.handle.net/. . .] in your request.**"],"dc:format":["application/pdf"],"dc:identifier":["http://hdl.handle.net/10477/80055"],"dc:language":["eng"],"dc:publisher":["State University of New York at Buffalo"],"dc:rights":["Users of works found in University at Buffalo Institutional Repository (UBIR) are responsible for identifying and contacting the copyright owner for permission to reuse. University at Buffalo Libraries do not manage rights for copyright-protected works and cannot assist with permissions.","Copyright retained by author."],"dc:subject":["engineering","environmental engineering"],"dc:title":["Fundamental Study of Free Volume Characteristics on Membrane H2/CO2 Separation"],"dc:type":["Text","Dissertation"]},"updated_at":"2026-07-27T19:05:23Z"}