{"id":{"repo_id":"cape-town","oai_identifier":"oai:open.uct.ac.za:11427/22269"},"canonical_url":"https://search.dev.ndltd.org/etd/cape-town/oai:open.uct.ac.za:11427/22269","repository":{"repo_id":"cape-town","name":"University of Cape Town","base_url":"https://open.uct.ac.za/oai/request"},"display":{"title":"Liquid side flow characteristics in a packed absorption column","abstract":"This thesis is primarily concerned with the study of techniques which enable flow conditions in complex geometrical arrangements to be measured and analysed. The liquid side in a packed absorption tower is chosen to illustrate the principles involved. The analysis of disturbance testing involves the evaluation of the moments of the resulting residence time distribution curves. It has in the past been found that this method often produces misleading results due to the magnification of experimental errors. An improved method of moment analysis is introduced in this work in an attempt to lessen this effect. It is also shown that much more useful information can be obtained by measuring the response to a disturbance at a number of selected positions in the bed rather than a single determination at the outlet from the column. Two mathematical models are chosen to describe the observed flow situation. The values of their characteristic parameters, as determined from the disturbance testing, are shown to exhibit a number of interesting features which enhance our knowledge of liquid side flow conditions. Finally, a technique is introduced to study flow behaviour from chemical reaction data. The experimental results obtained are shown to agree very closely with theoretically derived values.","abstract_html":"This thesis is primarily concerned with the study of techniques which enable flow conditions in complex geometrical arrangements to be measured and analysed. The liquid side in a packed absorption tower is chosen to illustrate the principles involved. The analysis of disturbance testing involves the evaluation of the moments of the resulting residence time distribution curves. It has in the past been found that this method often produces misleading results due to the magnification of experimental errors. An improved method of moment analysis is introduced in this work in an attempt to lessen this effect. It is also shown that much more useful information can be obtained by measuring the response to a disturbance at a number of selected positions in the bed rather than a single determination at the outlet from the column. Two mathematical models are chosen to describe the observed flow situation. The values of their characteristic parameters, as determined from the disturbance testing, are shown to exhibit a number of interesting features which enhance our knowledge of liquid side flow conditions. Finally, a technique is introduced to study flow behaviour from chemical reaction data. The experimental results obtained are shown to agree very closely with theoretically derived values.","abstract_has_math":false,"creators":["Bryson, Anthony Watson"],"institution":"Department of Chemical Engineering","degree_name":null,"degree_level":null,"degree_discipline":null,"degree_department":null,"school":null,"contributors":[],"advisors":["Carr, A D"],"committee_chairs":[],"committee_members":[],"year":1965,"date_issued":"1965","date_published":"1965","updated_at":"2026-07-22T22:23:45Z","subjects":[],"languages":["eng"],"rights":[],"rights_urls":[],"identifier_entries":[]},"links":{"outbound_url":"http://hdl.handle.net/11427/22269","outbound_label":"Handle","outbound_source":"dc:identifier.uri"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor.advisor","label":"Advisor","values":["Carr, A D"]},{"key":"dc:creator","label":"Author","values":["Bryson, Anthony Watson"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date.accessioned","label":"Dc Date Accessioned","values":["2016-10-24T03:48:50Z"]},{"key":"dc:date.available","label":"Dc Date Available","values":["2016-10-24T03:48:50Z"]},{"key":"dc:date.issued","label":"Date","values":["1965"]},{"key":"dc:publisher.department","label":"Dc Publisher Department","values":["Department of Chemical Engineering"]},{"key":"dc:publisher.institution","label":"Dc Publisher Institution","values":["University of Cape Town"]},{"key":"dc:type","label":"Dc Type","values":["Doctoral Thesis"]},{"key":"dc:type.qualificationlevel","label":"Dc Type Qualificationlevel","values":["Doctoral"]},{"key":"dc:type.qualificationname","label":"Dc Type Qualificationname","values":["PhD"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language.iso","label":"Language (ISO)","values":["eng"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier.uri","label":"Identifier URI","values":["http://hdl.handle.net/11427/22269"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description.abstract","label":"Abstract","values":["This thesis is primarily concerned with the study of techniques which enable flow conditions in complex geometrical arrangements to be measured and analysed. The liquid side in a packed absorption tower is chosen to illustrate the principles involved. The analysis of disturbance testing involves the evaluation of the moments of the resulting residence time distribution curves. It has in the past been found that this method often produces misleading results due to the magnification of experimental errors. An improved method of moment analysis is introduced in this work in an attempt to lessen this effect. It is also shown that much more useful information can be obtained by measuring the response to a disturbance at a number of selected positions in the bed rather than a single determination at the outlet from the column. Two mathematical models are chosen to describe the observed flow situation. The values of their characteristic parameters, as determined from the disturbance testing, are shown to exhibit a number of interesting features which enhance our knowledge of liquid side flow conditions. Finally, a technique is introduced to study flow behaviour from chemical reaction data. The experimental results obtained are shown to agree very closely with theoretically derived values."]},{"key":"dc:title","label":"Title","values":["Liquid side flow characteristics in a packed absorption column"]}]}],"canonical_facts":{"dc:contributor.advisor":["Carr, A D"],"dc:creator":["Bryson, Anthony Watson"],"dc:date.accessioned":["2016-10-24T03:48:50Z"],"dc:date.available":["2016-10-24T03:48:50Z"],"dc:date.issued":["1965"],"dc:description.abstract":["This thesis is primarily concerned with the study of techniques which enable flow conditions in complex geometrical arrangements to be measured and analysed. The liquid side in a packed absorption tower is chosen to illustrate the principles involved. The analysis of disturbance testing involves the evaluation of the moments of the resulting residence time distribution curves. It has in the past been found that this method often produces misleading results due to the magnification of experimental errors. An improved method of moment analysis is introduced in this work in an attempt to lessen this effect. It is also shown that much more useful information can be obtained by measuring the response to a disturbance at a number of selected positions in the bed rather than a single determination at the outlet from the column. Two mathematical models are chosen to describe the observed flow situation. The values of their characteristic parameters, as determined from the disturbance testing, are shown to exhibit a number of interesting features which enhance our knowledge of liquid side flow conditions. Finally, a technique is introduced to study flow behaviour from chemical reaction data. The experimental results obtained are shown to agree very closely with theoretically derived values."],"dc:identifier.uri":["http://hdl.handle.net/11427/22269"],"dc:language.iso":["eng"],"dc:publisher.department":["Department of Chemical Engineering"],"dc:publisher.institution":["University of Cape Town"],"dc:title":["Liquid side flow characteristics in a packed absorption column"],"dc:type":["Doctoral Thesis"],"dc:type.qualificationlevel":["Doctoral"],"dc:type.qualificationname":["PhD"]},"updated_at":"2026-07-22T22:23:45Z"}