کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
6588263 1423228 2018 29 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Theoretical modeling of transient reaction-diffusion dynamics in electrokinetic Y-shaped microreactors
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
Theoretical modeling of transient reaction-diffusion dynamics in electrokinetic Y-shaped microreactors
چکیده انگلیسی
We perform a theoretical study on transient reaction-diffusion kinetics in an electrokinetic Y-shaped microreactor. The flow is assumed to be both steady and fully developed. The governing equations are solved in dimensionless form utilizing a 3D finite-volume-based numerical algorithm, assuming a second-order irreversible reaction between the components. Analytical solutions are also obtained for cross-stream diffusion without reaction under a uniform velocity distribution. It is shown that the well-known butterfly-shaped form of the product concentration profile is not immediately created and it is established only after the system is sufficiently close to its steady-state. Furthermore, the inclination of the concentration peak toward the component of lower diffusivity or inlet concentration is less significant at the earlier stages of the production. Finally, it is demonstrated that the short-term influence of the parameters affecting the advection of mass on the total efficiency, defined as the ratio of the total production to the amount of the limiting reactant within the device, is quite the opposite of that at the steady-state.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Chemical Engineering Science - Volume 191, 14 December 2018, Pages 358-368
نویسندگان
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