Metastable zone width for secondary nucleation and secondary nucleation inside the metastable zone

• Tipo: Artigo em Revista Científica Internacional
• Data: 2011

Autores

Khaddour, I (Autor) Outra; Rocha, F (Autor) FEUP

Revista

Título: Crystal Research and Technology

Vol. 46 Nº 4

Páginas: 373-382

ISSN: 0232-1300

Editora: Wiley-Blackwell

Indexação

ISI Web of Knowledge - 3 Citações

ISI Web of Science

Scopus - 4 Citações

Classificação Científica

FOS: Ciências exactas e naturais > Química

Outras Informações

ID Authenticus: P-002-SQ5

DOI: 10.1002/crat.201000509

Abstract (EN): This study presents an evaluation of a new method, called zero growth activation free energy, used to determine the metastable zone width for the secondary nucleation case. It predicts the metastable zone width with a maximum error of 5-10%. Estimation of the metastable zone width for different isothermal crystallization conditions can be modeled according to a chosen reference set of growth experiments carried out in the volume diffusion regime at different initial supersaturations, using seed crystals of a certain characteristic size. Moreover, the activation free energy of the secondary nucleation was estimated. The role of the enthalpy of immersion in the formation of secondary nucleation events inside the metastable zone was pointed out, as well as its effect in causing extra-fast growth rate. Furthermore, sucrose crystal surface free energy was estimated. (C) 2011 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 10