Dissolution kinetics of crystalline alpha-glucose in 2-methyl 2-butanol

M.V. Flores, J.M. Engasser, P.J. Halling

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

The purpose of the present study is the development of a kinetic model to predict and understand the dissolution of crystalline alpha-glucose in 2-methyl 2-butanol. The model takes into account three processes that might control the dissolution rate of alpha-glucose crystals. The first step, the detachment of alpha-glucose molecules from the solid surface at the solid-liquid interface, is characterised by k(R), the time-independent rate constant for interfacial reaction. The second step, the mass transport of alpha-glucose from the solid-liquid interface to the bulk solution across the boundary layer, is characterised by k(T)(L(t)), the rate constant for transport which depends on the particle size, L(t), and hence on time. The third step is the mutarotation of alpha-glucose in solution, characterised by the forward mutarotation kinetic constant, k(1). The constants k(R) and k(1), are obtained by fitting the model to the experimental data of alpha- and beta-glucose concentration in the bulk as a function of time. k(T)(L(t)) is estimated using correlations based on geometry, operational conditions and alpha-glucose particle size. The particle size distribution of the primary solid particles was experimentally determined. The model fits well the experimental results, and reveals that, for stirring speeds between 300 and 700 rpm, both transport and interfacial reaction share the control of the dissolution rate of alpha-glucose in 2-methyl 2-butanol.
LanguageEnglish
Pages245-252
Number of pages7
JournalBiochemical Engineering Journal
Volume22
Issue number3
DOIs
Publication statusPublished - Feb 2005

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Butenes
Glucose
Dissolution
Crystalline materials
Kinetics
Particle Size
Surface chemistry
Rate constants
Particle size
Alpha Particles
tert-amyl alcohol
Liquids
Particle size analysis
Particles (particulate matter)
Boundary layers
Theoretical Models
Mass transfer
Crystals
Molecules
Geometry

Keywords

  • alpha-glucose crystals
  • kinetic model

Cite this

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abstract = "The purpose of the present study is the development of a kinetic model to predict and understand the dissolution of crystalline alpha-glucose in 2-methyl 2-butanol. The model takes into account three processes that might control the dissolution rate of alpha-glucose crystals. The first step, the detachment of alpha-glucose molecules from the solid surface at the solid-liquid interface, is characterised by k(R), the time-independent rate constant for interfacial reaction. The second step, the mass transport of alpha-glucose from the solid-liquid interface to the bulk solution across the boundary layer, is characterised by k(T)(L(t)), the rate constant for transport which depends on the particle size, L(t), and hence on time. The third step is the mutarotation of alpha-glucose in solution, characterised by the forward mutarotation kinetic constant, k(1). The constants k(R) and k(1), are obtained by fitting the model to the experimental data of alpha- and beta-glucose concentration in the bulk as a function of time. k(T)(L(t)) is estimated using correlations based on geometry, operational conditions and alpha-glucose particle size. The particle size distribution of the primary solid particles was experimentally determined. The model fits well the experimental results, and reveals that, for stirring speeds between 300 and 700 rpm, both transport and interfacial reaction share the control of the dissolution rate of alpha-glucose in 2-methyl 2-butanol.",
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Dissolution kinetics of crystalline alpha-glucose in 2-methyl 2-butanol. / Flores, M.V.; Engasser, J.M.; Halling, P.J.

In: Biochemical Engineering Journal, Vol. 22, No. 3, 02.2005, p. 245-252.

Research output: Contribution to journalArticle

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