{"id":{"repo_id":"uiuc","oai_identifier":"oai:www.ideals.illinois.edu:2142/26415"},"canonical_url":"https://search.dev.ndltd.org/etd/uiuc/oai:www.ideals.illinois.edu:2142/26415","repository":{"repo_id":"uiuc","name":"University of Illinois - Urbana-Champaign","base_url":"https://www.ideals.illinois.edu/oai-pmh"},"display":{"title":"Development of a micro-FID using a diffusion flame","abstract":"A micro-flame ionization detector (micro-FID) was developed operating with a diffusion flame with a folded flame structure. Unlike conventional FIDs, an air-hydrogen diffusion flame was developed and tested in an encapsulated structure of Quartz-Macor®-Quartz layers. Diffusion flames are generally known to be more controllable and stable than premixed flames, which fits our purpose for the micro-FID, where the stability plays an important role for many applications. Various Macor designs including a burner cavity and a micro-channel were tested to obtain highest output sensitivity over methane test samples. In order to gauge sensitivity of the device, collected electric charge per mole (C/mol) was calculated and taken as a reference value of ionization efficiency. The result was 1.959x10-2 C/mol for methane which was about 34 times higher compared to the result obtained using a counter-flow flame, which was 5.73x10-4 C/mol for methane, while one of the commercial macro FIDs has 10-1 C/mol. This result shows that the micro-FID using the folded flame structure enhances ionization with less leakage of the analytes than the classical counter-flow flame design.","abstract_html":"A micro-flame ionization detector (micro-FID) was developed operating with a diffusion flame with a folded flame structure. Unlike conventional FIDs, an air-hydrogen diffusion flame was developed and tested in an encapsulated structure of Quartz-Macor®-Quartz layers. Diffusion flames are generally known to be more controllable and stable than premixed flames, which fits our purpose for the micro-FID, where the stability plays an important role for many applications. Various Macor designs including a burner cavity and a micro-channel were tested to obtain highest output sensitivity over methane test samples. In order to gauge sensitivity of the device, collected electric charge per mole (C/mol) was calculated and taken as a reference value of ionization efficiency. The result was 1.959x10-2 C/mol for methane which was about 34 times higher compared to the result obtained using a counter-flow flame, which was 5.73x10-4 C/mol for methane, while one of the commercial macro FIDs has 10-1 C/mol. This result shows that the micro-FID using the folded flame structure enhances ionization with less leakage of the analytes than the classical counter-flow flame design.","abstract_has_math":false,"creators":["Kim, Jihyung"],"institution":"University of Illinois at Urbana-Champaign","degree_name":"M.S.","degree_level":"Thesis","degree_discipline":"Mechanical Engineering","degree_department":null,"school":null,"contributors":["Shannon, Mark A."],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2011,"date_issued":"2011-08-26T15:35:01Z","date_published":"2011-08-26T15:35:01Z","updated_at":"2026-07-22T22:25:27Z","subjects":["micro flame ionization detector"],"languages":["en"],"rights":["Copyright 2011 Jihyung Kim"],"rights_urls":[],"identifier_entries":[]},"links":{"outbound_url":"http://hdl.handle.net/2142/26415","outbound_label":"Handle","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor","label":"Contributor","values":["Shannon, Mark A."]},{"key":"dc:creator","label":"Author","values":["Kim, Jihyung"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date","label":"Dc Date","values":["2011-08-26T15:35:01Z","2013-08-27T10:00:28Z","2011-08"]},{"key":"thesis:degree_discipline","label":"Discipline","values":["Mechanical Engineering"]},{"key":"thesis:degree_level","label":"Degree Level","values":["Thesis"]},{"key":"thesis:degree_name","label":"Degree Name","values":["M.S."]},{"key":"thesis:institution_name","label":"Thesis Institution Name","values":["University of Illinois at Urbana-Champaign"]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["micro flame ionization detector"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language","label":"Dc Language","values":["en"]},{"key":"dc:rights","label":"Dc Rights","values":["Copyright 2011 Jihyung Kim"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["http://hdl.handle.net/2142/26415"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description","label":"Description","values":["A micro-flame ionization detector (micro-FID) was developed operating with a diffusion flame with a folded flame structure. Unlike conventional FIDs, an air-hydrogen diffusion flame was developed and tested in an encapsulated structure of Quartz-Macor®-Quartz layers. Diffusion flames are generally known to be more controllable and stable than premixed flames, which fits our purpose for the micro-FID, where the stability plays an important role for many applications. Various Macor designs including a burner cavity and a micro-channel were tested to obtain highest output sensitivity over methane test samples. In order to gauge sensitivity of the device, collected electric charge per mole (C/mol) was calculated and taken as a reference value of ionization efficiency. The result was 1.959x10-2 C/mol for methane which was about 34 times higher compared to the result obtained using a counter-flow flame, which was 5.73x10-4 C/mol for methane, while one of the commercial macro FIDs has 10-1 C/mol. This result shows that the micro-FID using the folded flame structure enhances ionization with less leakage of the analytes than the classical counter-flow flame design.","Item withdrawn by Mark Zulauf (zulauf@illinois.edu) on 2011-07-21T12:26:24Z Item was in collections: University of Illinois Theses & Dissertations (ID: 1) No. of bitstreams: 2 Kim_Jihyung.doc: 5334528 bytes, checksum: c58ec6507140428f782f8078bba20f1c (MD5) Kim_Jihyung.pdf: 1089333 bytes, checksum: 21f47a80c0209c56b606aa9a0dc7f4dc (MD5)","Made available in DSpace on 2011-08-26T15:35:01Z (GMT). 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