[article]
| Titre : |
Simple kinetic expressions to study the transport process during the growth of crystals in solution |
| Type de document : |
texte imprimé |
| Auteurs : |
K. Vasanth Kumar, Auteur |
| Année de publication : |
2010 |
| Article en page(s) : |
pp. 11236–11240 |
| Note générale : |
Industrial chemistry |
| Langues : |
Anglais (eng) |
| Mots-clés : |
Simple--Kinetic--Expressions--Study--Transport--Process--during--Growth--Crystals--Solution |
| Résumé : |
First- and second-order kinetic expressions are proposed to explain the growth of crystals in solutions limited by diffusion and integration kinetics, respectively. The experimental growth kinetic data of sucrose crystals at 30 and 40 °C were fitted to the kinetic expressions by a linear regression method. A linear second-order expression proposed based on the Burton−Cabrera−Frank (BCF) model was found to be useful in identifying the transition in kinetics from the diffusion to the kinetic regime during the crystal growth process. A parameter, Atcritical (product of crystal area and time) was defined according to a second-order kinetic expression. The growth process was found to be limited by diffusion and surface reaction kinetics for At Atcritical, respectively. An initial reaction rate was defined according to a second-order surface reaction kinetics. The mass-transfer coefficient during the growth of crystals increases with increasing temperature, whereas the reaction kinetic constant was found to decrease with increasing temperature. The total adsorption energy for the growth of sucrose crystals in the diffusion and kinetic regime during was found to be >95 kJ/mol according to the derived expressions. |
| ISSN : |
0888-5885 |
| En ligne : |
http://pubs.acs.org/doi/abs/10.1021/ie900823x |
in Industrial & engineering chemistry research > Vol. 48 N° 24 (Décembre 2009) . - pp. 11236–11240
[article] Simple kinetic expressions to study the transport process during the growth of crystals in solution [texte imprimé] / K. Vasanth Kumar, Auteur . - 2010 . - pp. 11236–11240. Industrial chemistry Langues : Anglais ( eng) in Industrial & engineering chemistry research > Vol. 48 N° 24 (Décembre 2009) . - pp. 11236–11240
| Mots-clés : |
Simple--Kinetic--Expressions--Study--Transport--Process--during--Growth--Crystals--Solution |
| Résumé : |
First- and second-order kinetic expressions are proposed to explain the growth of crystals in solutions limited by diffusion and integration kinetics, respectively. The experimental growth kinetic data of sucrose crystals at 30 and 40 °C were fitted to the kinetic expressions by a linear regression method. A linear second-order expression proposed based on the Burton−Cabrera−Frank (BCF) model was found to be useful in identifying the transition in kinetics from the diffusion to the kinetic regime during the crystal growth process. A parameter, Atcritical (product of crystal area and time) was defined according to a second-order kinetic expression. The growth process was found to be limited by diffusion and surface reaction kinetics for At Atcritical, respectively. An initial reaction rate was defined according to a second-order surface reaction kinetics. The mass-transfer coefficient during the growth of crystals increases with increasing temperature, whereas the reaction kinetic constant was found to decrease with increasing temperature. The total adsorption energy for the growth of sucrose crystals in the diffusion and kinetic regime during was found to be >95 kJ/mol according to the derived expressions. |
| ISSN : |
0888-5885 |
| En ligne : |
http://pubs.acs.org/doi/abs/10.1021/ie900823x |
|
Simple kinetic expressions to study the transport process during the growth of crystals in solution in Industrial & engineering chemistry research, Vol. 48 N° 24 (Décembre 2009)
