کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5423250 | 1507953 | 2010 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Kinetics and thermodynamics of sucrose crystal growth in the presence of a non-ionic surfactant
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی تئوریک و عملی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Batch experiments were carried out to study the effect of Hodag CB6, a non-ionic surfactant, on the growth kinetics of sucrose crystals as a function of supersaturation, impurity concentration and temperature. The growth promoting effect of the added impurity, studied using a recently introduced spiral nucleation model (SNM), was due to the decrease in the surface free energy induced by the added surfactant. The growth process was influenced by both kinetic and thermodynamic effect, the latter being predominant. The coverage of impurity molecules on the sucrose surface followed a Henry type expression according to Langmuir isotherm at studied temperatures. In the case of a pure system, the total active kink density was found to be around 1016 kinks/m2. The active growth sites on the crystal surface were found to be two orders of magnitude lower than the total number of sucrose molecules.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Surface Science - Volume 604, Issues 11â12, 15 June 2010, Pages 981-987
Journal: Surface Science - Volume 604, Issues 11â12, 15 June 2010, Pages 981-987
نویسندگان
K. Vasanth Kumar, F. Rocha,