Effects of impurities on crystal growth in sucrose crystallization

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

The presence of glucose is found to enhance growth rate of sucrose crystals using a photomicroscopic technique in an isothermal, continuous-flow chamber. A model is presented to describe the enhanced growth phenomenon studied here. This model assumes that the growth rate increases with increasing surface coverage(θ) by impurity adsorbed on the crystal surface, and an effectiveness factor(α) is introduced to take into account the growth promoting ability of the impurity adsorbed on the crystal surface. As the diffusion process proceeds very fast in this work, the adsorption process of the impurity on the crystal surface is assumed to reach the equilibrium state and the Langmuir adsorption isotherm is applied to relate the fractional coverage of the impurity on the crystal surface with the impurity concentration in solution. In the end, α and the Langmuir constant(K) are determined by fitting the experimental data with the proposed model. This is an extended study of the previous work by the authors (Shiau, 2003).

Original languageEnglish
Title of host publication2005 AIChE Spring National Meeting, Conference Proceedings
Pages3049
Number of pages1
StatePublished - 2005
Event2005 AIChE Spring National Meeting - Atlanta, GA, United States
Duration: 10 04 200514 04 2005

Publication series

Name2005 AIChE Spring National Meeting, Conference Proceedings

Conference

Conference2005 AIChE Spring National Meeting
Country/TerritoryUnited States
CityAtlanta, GA
Period10/04/0514/04/05

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