Title:
Utilization of FBRM in the Control of CSD in a Batch Cooled Crystallizer

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dc.contributor.advisor Rousseau, Ronald W.
dc.contributor.author Barthe, Stephanie Cecile en_US
dc.contributor.committeeMember Teja, Amyn S.
dc.contributor.committeeMember Martha Gallivan
dc.contributor.department Chemical Engineering en_US
dc.date.accessioned 2006-06-09T18:22:28Z
dc.date.available 2006-06-09T18:22:28Z
dc.date.issued 2006-04-12 en_US
dc.description.abstract Controlling crystal size distribution (CSD) is important to downstream processing and to product quality. It is well-recognized that selective removal functions can be used to influence CSD, for example by manufacturing a product with a larger dominant size or narrower distribution. Early work on the use of feedback control to manipulate the residence time distribution functions of fines in a continuous crystallizer demonstrated the utility of such an approach in handling process upsets and cycling that resulted from system instability. These efforts were extended to batch crystallization, although there remained significant difficulty associated with on-line analysis of the size distribution. The development of new technologies, such as Focused Beam Reflectance Measurement (FBRM), provides a methodology for on-line monitoring of a representation of the crystal population in either batch or continuous crystallization systems. The FBRM technology is based on laser light scattering; properly installed, it allows on-line determination of the chord length distribution (CLD), which is statistically related to the CSD and depends on the geometry of the crystal. The purpose of the present study is to use the FBRM to monitor the evolution of CSD characteristics and to implement a feedback control scheme that provides the flexibility to move the CSD in a preferred direction. Cooling batch crystallizations of paracetamol has been chosen to investigate implementation of the control scheme. The work will show how fines removal and varying cooling rates provide reliable and practical control of crystal size distribution. en_US
dc.description.degree M.S. en_US
dc.format.extent 1183036 bytes
dc.format.mimetype application/pdf
dc.identifier.uri http://hdl.handle.net/1853/10552
dc.language.iso en_US
dc.publisher Georgia Institute of Technology en_US
dc.subject Chord length en_US
dc.subject Batch cooled crystallization
dc.subject FBRM
dc.title Utilization of FBRM in the Control of CSD in a Batch Cooled Crystallizer en_US
dc.type Text
dc.type.genre Thesis
dspace.entity.type Publication
local.contributor.advisor Rousseau, Ronald W.
local.contributor.corporatename School of Chemical and Biomolecular Engineering
local.contributor.corporatename College of Engineering
relation.isAdvisorOfPublication 54a1d094-6cef-41c7-8168-e36b41eaf4f7
relation.isOrgUnitOfPublication 6cfa2dc6-c5bf-4f6b-99a2-57105d8f7a6f
relation.isOrgUnitOfPublication 7c022d60-21d5-497c-b552-95e489a06569
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