{"id":{"repo_id":"vt","oai_identifier":"oai:vtechworks.lib.vt.edu:10919/114712"},"canonical_url":"https://search.dev.ndltd.org/etd/vt/oai:vtechworks.lib.vt.edu:10919/114712","repository":{"repo_id":"vt","name":"Virginia Tech","base_url":"https://vtechworks.lib.vt.edu/oai/request"},"display":{"title":"A kinetic study of the interaction between atomic oxygen and aerosols","abstract":"This study was concerned with the effects of aerosols on the kinetics of disappearance of atomic oxygen. Atomic oxygen was generated by a 2450 MHz microwave discharge, and the kinetics of disappearance measured in a fast flow system using N02 titration. The recombination coefficient, for heterogeneous wall recombination was determined for clean Pyrex, H2SO4 coated wall, and (NH4)2SO4 coated wall. The values of γ were 4.97 x 10-5, 2.05 x 10-5, and 1.90 x 10-5 respectively. A rapid exothermic chemical reaction was found to occur between atomic oxygen and NH4C1; the products, as determined by mass spectrometry, were NH3, NO, H2O, HC1. An NH4Cl aerosol was generated by gas phase reaction of NH3(g) with HCl(g), The aerosol particles were approximately spherical and nearly monodisperse with a mean diameter of 1.6 ± .2 μm. The rate constant {kAERO) for the disappearance of atomic oxygen in the presence of an NH4Cl aerosol was measured. For an aerosol concentration of 4.75 x 103 µg/m3. a value of kAERO = 2.75 ± .5 sec-1 was found,","abstract_html":"This study was concerned with the effects of aerosols on the kinetics of disappearance of atomic oxygen. Atomic oxygen was generated by a 2450 MHz microwave discharge, and the kinetics of disappearance measured in a fast flow system using N0<sub>2</sub> titration. The recombination coefficient, for heterogeneous wall recombination was determined for clean Pyrex, H<sub>2</sub>SO<sub>4</sub> coated wall, and (NH<sub>4</sub>)<sub>2</sub>SO<sub>4</sub> coated wall. The values of γ were 4.97 x 10<sup>-5</sup>, 2.05 x 10<sup>-5</sup>, and 1.90 x 10<sup>-5</sup> respectively. A rapid exothermic chemical reaction was found to occur between atomic oxygen and NH<sub>4</sub>C1; the products, as determined by mass spectrometry, were NH<sub>3</sub>, NO, H<sub>2</sub>O, HC1. An NH<sub>4</sub>Cl aerosol was generated by gas phase reaction of NH<sub>3</sub>(g) with HCl(g), The aerosol particles were approximately spherical and nearly monodisperse with a mean diameter of 1.6 ± .2 μm. The rate constant {k<sub>AERO</sub>) for the disappearance of atomic oxygen in the presence of an NH<sub>4</sub>Cl aerosol was measured. For an aerosol concentration of 4.75 x 10<sup>3</sup> µg/m<sup>3</sup>. a value of k<sub>AERO</sub> = 2.75 ± .5 sec<sup>-1</sup> was found,","abstract_has_math":false,"creators":["Akers, Francis I. (Francis Irving)"],"institution":"Virginia Polytechnic Institute and State University","degree_name":"M.S.","degree_level":"masters","degree_discipline":"Chemistry","degree_department":"Chemistry","school":null,"contributors":[],"advisors":[],"committee_chairs":[],"committee_members":[],"year":1974,"date_issued":"1974","date_published":"1974","updated_at":"2026-07-22T22:19:22Z","subjects":[],"languages":["en"],"rights":["In Copyright"],"rights_urls":["http://rightsstatements.org/vocab/InC/1.0/"],"identifier_entries":[]},"links":{"outbound_url":"http://hdl.handle.net/10919/114712","outbound_label":"Handle","outbound_source":"dc:identifier.uri"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor.department","label":"Department","values":["Chemistry"]},{"key":"dc:creator","label":"Author","values":["Akers, Francis I. (Francis Irving)"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date.accessioned","label":"Dc Date Accessioned","values":["2023-04-20T14:53:50Z"]},{"key":"dc:date.available","label":"Dc Date Available","values":["2023-04-20T14:53:50Z"]},{"key":"dc:date.issued","label":"Date","values":["1974"]},{"key":"dc:publisher","label":"Institution","values":["Virginia Polytechnic Institute and State University"]},{"key":"dc:type","label":"Dc Type","values":["Thesis"]},{"key":"dc:type.dcmitype","label":"Dc Type Dcmitype","values":["Text"]},{"key":"thesis:degree_discipline","label":"Discipline","values":["Chemistry"]},{"key":"thesis:degree_level","label":"Degree Level","values":["masters"]},{"key":"thesis:degree_name","label":"Degree Name","values":["M.S."]},{"key":"thesis:institution_name","label":"Thesis Institution Name","values":["Virginia Polytechnic Institute and State University"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language.iso","label":"Language (ISO)","values":["en"]},{"key":"dc:rights","label":"Dc Rights","values":["In Copyright"]},{"key":"dc:rights.uri","label":"Rights URI","values":["http://rightsstatements.org/vocab/InC/1.0/"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier.uri","label":"Identifier URI","values":["http://hdl.handle.net/10919/114712"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description.abstract","label":"Abstract","values":["This study was concerned with the effects of aerosols on the kinetics of disappearance of atomic oxygen. Atomic oxygen was generated by a 2450 MHz microwave discharge, and the kinetics of disappearance measured in a fast flow system using N02 titration. The recombination coefficient, for heterogeneous wall recombination was determined for clean Pyrex, H2SO4 coated wall, and (NH4)2SO4 coated wall. The values of γ were 4.97 x 10-5, 2.05 x 10-5, and 1.90 x 10-5 respectively. A rapid exothermic chemical reaction was found to occur between atomic oxygen and NH4C1; the products, as determined by mass spectrometry, were NH3, NO, H2O, HC1. An NH4Cl aerosol was generated by gas phase reaction of NH3(g) with HCl(g), The aerosol particles were approximately spherical and nearly monodisperse with a mean diameter of 1.6 ± .2 μm. The rate constant {kAERO) for the disappearance of atomic oxygen in the presence of an NH4Cl aerosol was measured. For an aerosol concentration of 4.75 x 103 µg/m3. a value of kAERO = 2.75 ± .5 sec-1 was found,"]},{"key":"dc:description.degree","label":"Dc Description Degree","values":["M.S."]},{"key":"dc:format.mimetype","label":"Dc Format Mimetype","values":["application/pdf"]},{"key":"dc:title","label":"Title","values":["A kinetic study of the interaction between atomic oxygen and aerosols"]}]}],"canonical_facts":{"dc:contributor.department":["Chemistry"],"dc:creator":["Akers, Francis I. (Francis Irving)"],"dc:date.accessioned":["2023-04-20T14:53:50Z"],"dc:date.available":["2023-04-20T14:53:50Z"],"dc:date.issued":["1974"],"dc:description.abstract":["This study was concerned with the effects of aerosols on the kinetics of disappearance of atomic oxygen. Atomic oxygen was generated by a 2450 MHz microwave discharge, and the kinetics of disappearance measured in a fast flow system using N02 titration. The recombination coefficient, for heterogeneous wall recombination was determined for clean Pyrex, H2SO4 coated wall, and (NH4)2SO4 coated wall. The values of γ were 4.97 x 10-5, 2.05 x 10-5, and 1.90 x 10-5 respectively. A rapid exothermic chemical reaction was found to occur between atomic oxygen and NH4C1; the products, as determined by mass spectrometry, were NH3, NO, H2O, HC1. An NH4Cl aerosol was generated by gas phase reaction of NH3(g) with HCl(g), The aerosol particles were approximately spherical and nearly monodisperse with a mean diameter of 1.6 ± .2 μm. The rate constant {kAERO) for the disappearance of atomic oxygen in the presence of an NH4Cl aerosol was measured. For an aerosol concentration of 4.75 x 103 µg/m3. a value of kAERO = 2.75 ± .5 sec-1 was found,"],"dc:description.degree":["M.S."],"dc:format.mimetype":["application/pdf"],"dc:identifier.uri":["http://hdl.handle.net/10919/114712"],"dc:language.iso":["en"],"dc:publisher":["Virginia Polytechnic Institute and State University"],"dc:rights":["In Copyright"],"dc:rights.uri":["http://rightsstatements.org/vocab/InC/1.0/"],"dc:title":["A kinetic study of the interaction between atomic oxygen and aerosols"],"dc:type":["Thesis"],"dc:type.dcmitype":["Text"],"thesis:degree_discipline":["Chemistry"],"thesis:degree_level":["masters"],"thesis:degree_name":["M.S."],"thesis:institution_name":["Virginia Polytechnic Institute and State University"]},"updated_at":"2026-07-22T22:19:22Z"}