Tracer fast ascending velocities in a bubble column inferred from carpt-calibration experiments

Mostrar todas las versiones(2)

The numerous applications of bubble columns (BC) in diverse fields of the chemical, petrochemical, biochemical and mineral industries are well known. In addition, the ability of the Computer Automated Radioactive Particle Tracking (CARPT) technique to get features of the liquid and/or the solid moti...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autores principales:	Fraguío, María Sol, Cassanello Fernández, Miryam Celeste, Cardona, María Angélica, Hojman, Daniel, Somacal, Héctor R.
Publicado:	2007
Materias:	Bubble columns Radioactive particle tracking Solid tracers Calibration Experiments Fluidization Fluidized beds Liquids Mineral industry Neutron irradiation Radioactive tracers Radioactivity Velocity Calibration experiments Computer automated radioactive particle tracking Gas-solid risers Heterogeneous flow Neutron bombardments Pneumatic system Tracer velocity
Acceso en línea:	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_97808531_v_n_p327_Fraguio http://hdl.handle.net/20.500.12110/paper_97808531_v_n_p327_Fraguio
Aporte de:	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires

id	paper:paper_97808531_v_n_p327_Fraguio
record_format	dspace
spelling	paper:paper_97808531_v_n_p327_Fraguio2023-06-08T16:37:11Z Tracer fast ascending velocities in a bubble column inferred from carpt-calibration experiments Fraguío, María Sol Cassanello Fernández, Miryam Celeste Cardona, María Angélica Hojman, Daniel Somacal, Héctor R. Bubble columns Radioactive particle tracking Solid tracers Calibration Experiments Fluidization Fluidized beds Liquids Mineral industry Neutron irradiation Radioactive tracers Radioactivity Velocity Calibration experiments Computer automated radioactive particle tracking Gas-solid risers Heterogeneous flow Neutron bombardments Pneumatic system Radioactive particle tracking Tracer velocity Bubble columns The numerous applications of bubble columns (BC) in diverse fields of the chemical, petrochemical, biochemical and mineral industries are well known. In addition, the ability of the Computer Automated Radioactive Particle Tracking (CARPT) technique to get features of the liquid and/or the solid motion in BC and slurry BC has been thoroughly demonstrated (Degaleesan et al., 2001; Devanathan et al., 1990). Furthermore, fast ascending velocities of the tracer found during the prolonged tracking periods have been associated to its motion while entrapped into the wake of passing large bubbles, pursuing the inference of information of the gas phase dynamics (Cassanello et al., 2001; Larachi et al., 1996). For other type of contactors (gas-solid risers and fluidized beds), fast tracer velocities have been related to solid clusters (Mostoufi and Chaouki, 2004; Bhusarapu et al., 2006). Therefore, present work pursues to point out, through calibration experiments, if differences between the actual tracer velocities and the velocities calculated from the reconstructed tracer positions during fast ascending/descending paths are acceptable. With this purpose, the motion of a radioactive tracer attached to a rod moving upwards/downwards, driven by a pneumatic system, is reconstructed from the combined response of eight NaI(Tl) scintillation detectors. The tracer is a PVC particle containing scandium oxide, activated by neutron bombardment to around 30 μCi. The rod is moved at different velocities in the range of 0.1 to 1 m/s and it travels 0.2 m upwards and downwards close to the column centre. A mini-pilot scale BC, 0.1m inner diameter and 1.2m high, is used with batch liquid, tap water, and flowing air at different gas velocities within the homogeneous and the heterogeneous flow regimes. Tracer positions are reconstructed every 0.03 s. Fast velocities are calculated from continuously ascending/descending paths and they are compare to the tracer velocity. © 2007, International Society for Industrial Process Tomography. All rights reserved. Fil:Fraguío, M.S. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Cassanello, M.C. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Cardona, M.A. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Hojman, D. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Somacal, H. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 2007 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_97808531_v_n_p327_Fraguio http://hdl.handle.net/20.500.12110/paper_97808531_v_n_p327_Fraguio
institution	Universidad de Buenos Aires
institution_str	I-28
repository_str	R-134
collection	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic	Bubble columns Radioactive particle tracking Solid tracers Calibration Experiments Fluidization Fluidized beds Liquids Mineral industry Neutron irradiation Radioactive tracers Radioactivity Velocity Calibration experiments Computer automated radioactive particle tracking Gas-solid risers Heterogeneous flow Neutron bombardments Pneumatic system Radioactive particle tracking Tracer velocity Bubble columns
spellingShingle	Bubble columns Radioactive particle tracking Solid tracers Calibration Experiments Fluidization Fluidized beds Liquids Mineral industry Neutron irradiation Radioactive tracers Radioactivity Velocity Calibration experiments Computer automated radioactive particle tracking Gas-solid risers Heterogeneous flow Neutron bombardments Pneumatic system Radioactive particle tracking Tracer velocity Bubble columns Fraguío, María Sol Cassanello Fernández, Miryam Celeste Cardona, María Angélica Hojman, Daniel Somacal, Héctor R. Tracer fast ascending velocities in a bubble column inferred from carpt-calibration experiments
topic_facet	Bubble columns Radioactive particle tracking Solid tracers Calibration Experiments Fluidization Fluidized beds Liquids Mineral industry Neutron irradiation Radioactive tracers Radioactivity Velocity Calibration experiments Computer automated radioactive particle tracking Gas-solid risers Heterogeneous flow Neutron bombardments Pneumatic system Radioactive particle tracking Tracer velocity Bubble columns
description	The numerous applications of bubble columns (BC) in diverse fields of the chemical, petrochemical, biochemical and mineral industries are well known. In addition, the ability of the Computer Automated Radioactive Particle Tracking (CARPT) technique to get features of the liquid and/or the solid motion in BC and slurry BC has been thoroughly demonstrated (Degaleesan et al., 2001; Devanathan et al., 1990). Furthermore, fast ascending velocities of the tracer found during the prolonged tracking periods have been associated to its motion while entrapped into the wake of passing large bubbles, pursuing the inference of information of the gas phase dynamics (Cassanello et al., 2001; Larachi et al., 1996). For other type of contactors (gas-solid risers and fluidized beds), fast tracer velocities have been related to solid clusters (Mostoufi and Chaouki, 2004; Bhusarapu et al., 2006). Therefore, present work pursues to point out, through calibration experiments, if differences between the actual tracer velocities and the velocities calculated from the reconstructed tracer positions during fast ascending/descending paths are acceptable. With this purpose, the motion of a radioactive tracer attached to a rod moving upwards/downwards, driven by a pneumatic system, is reconstructed from the combined response of eight NaI(Tl) scintillation detectors. The tracer is a PVC particle containing scandium oxide, activated by neutron bombardment to around 30 μCi. The rod is moved at different velocities in the range of 0.1 to 1 m/s and it travels 0.2 m upwards and downwards close to the column centre. A mini-pilot scale BC, 0.1m inner diameter and 1.2m high, is used with batch liquid, tap water, and flowing air at different gas velocities within the homogeneous and the heterogeneous flow regimes. Tracer positions are reconstructed every 0.03 s. Fast velocities are calculated from continuously ascending/descending paths and they are compare to the tracer velocity. © 2007, International Society for Industrial Process Tomography. All rights reserved.
author	Fraguío, María Sol Cassanello Fernández, Miryam Celeste Cardona, María Angélica Hojman, Daniel Somacal, Héctor R.
author_facet	Fraguío, María Sol Cassanello Fernández, Miryam Celeste Cardona, María Angélica Hojman, Daniel Somacal, Héctor R.
author_sort	Fraguío, María Sol
title	Tracer fast ascending velocities in a bubble column inferred from carpt-calibration experiments
title_short	Tracer fast ascending velocities in a bubble column inferred from carpt-calibration experiments
title_full	Tracer fast ascending velocities in a bubble column inferred from carpt-calibration experiments
title_fullStr	Tracer fast ascending velocities in a bubble column inferred from carpt-calibration experiments
title_full_unstemmed	Tracer fast ascending velocities in a bubble column inferred from carpt-calibration experiments
title_sort	tracer fast ascending velocities in a bubble column inferred from carpt-calibration experiments
publishDate	2007
url	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_97808531_v_n_p327_Fraguio http://hdl.handle.net/20.500.12110/paper_97808531_v_n_p327_Fraguio
work_keys_str_mv	AT fraguiomariasol tracerfastascendingvelocitiesinabubblecolumninferredfromcarptcalibrationexperiments AT cassanellofernandezmiryamceleste tracerfastascendingvelocitiesinabubblecolumninferredfromcarptcalibrationexperiments AT cardonamariaangelica tracerfastascendingvelocitiesinabubblecolumninferredfromcarptcalibrationexperiments AT hojmandaniel tracerfastascendingvelocitiesinabubblecolumninferredfromcarptcalibrationexperiments AT somacalhectorr tracerfastascendingvelocitiesinabubblecolumninferredfromcarptcalibrationexperiments
_version_	1768545212188065792

Tracer fast ascending velocities in a bubble column inferred from carpt-calibration experiments

Ejemplares similares