2007
DOI: 10.1002/aic.11308
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Plantwide operation of processes with crystallization

Abstract: in Wiley InterScience (www.interscience.wiley.com).Simple analytical expressions are developed to model the steady-state operation of a chemical plant with a continuous crystallizer. The equations show analytically how uncontrolled variables change with the changing production rate depending on the values of key kinetic parameters and the choice of controlled variables. Because the results are derived, their validity and limitations are more apparent than heuristics that are suggested based on case studies. Fu… Show more

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Cited by 16 publications
(20 citation statements)
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“…The inspiration for this approach is that comprehensive knowledge and experiences are available for controlling the major unit operations. Control design for special unit operations has been the subject of academic and industrial research, (e.g., Ward, et al 2007;Ward, et al 2010;Skogestad 1988Skogestad , 2007Hori and Skogestad, 2007). Although the approach based on combining unit-wise control structures for individual unit operations ignores the plant-wide interactions among them, still this method has wide industrial applications.…”
Section: Complexity Reduction Based On Process Componentsmentioning
confidence: 99%
“…The inspiration for this approach is that comprehensive knowledge and experiences are available for controlling the major unit operations. Control design for special unit operations has been the subject of academic and industrial research, (e.g., Ward, et al 2007;Ward, et al 2010;Skogestad 1988Skogestad , 2007Hori and Skogestad, 2007). Although the approach based on combining unit-wise control structures for individual unit operations ignores the plant-wide interactions among them, still this method has wide industrial applications.…”
Section: Complexity Reduction Based On Process Componentsmentioning
confidence: 99%
“…Other related quantities must use the same basis for consistency; i.e., the volumetric flow rate out of the crystallizer q must have units of (kg solvent)/ s, (m 3 clear solution)/s, or (m 3 suspension)/s, respectively. The previous results of Ward et al 6 do not depend on any particular basis and will work regardless of basis as long as that basis is used consistently. In the present work, however, the equation for the filter model is only strictly valid if the volume of clear solution is used as a basis, as demonstrated in the following derivation of eq 14.…”
Section: Appendix A: Note On Concentration Basis and Filter Model Equmentioning
confidence: 88%
“…More details can be found in Ward et al 6 and in the Webpublished supplement to that paper. Table 8 shows certain key process parameters related to the operation of the crystallizer and filter.…”
Section: Appendix B: Adipic Acid Case Studymentioning
confidence: 94%
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“…The system’s steady state in population balance models is frequently studied for nucleation and crystal growth processes . In the cell duplication context, cell cycle phases may reach steady state with respect to the percentage of cells in each phase ( G % , S % , M % ) but not in the phases themselves (G, S, M) as the absolute count will increase over time as a result of doubling.…”
Section: Model Definitionsmentioning
confidence: 99%