Trinth, Thanh and Shuib, Anis and Ku Shaari, Ku Zilati and Ismail, Lukman (2013) Modeling of Urea Release from Coated Urea for Prediction of Coating Material Diffusivity. In: The International Conference on Process Systems Engineering Asia, 25-27th June 2013, Kuala Lumpur.
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Official URL: http://www.cheme.utm.my/pseasia2013/
Abstract
This study investigates the diffusion of urea from the surface of solid urea to environment through multilayer using finite element method (FEM). A multi-diffusion model was established to simulate the diffusion of urea through coating layer and to environment. Firstly, a comparison between analytical and numerical model was conducted to obtain accurate numerical model for the diffusion of urea. Secondly, model was applied to study the effect of diffusivity coefficient on urea releasing time. Modeling results indicated that releasing time increases as effective diffusivity coefficient decreases. Releasing time was 8.34 days with a diffusivity coefficient of 1.60 x 10-13 m2/s and 132.96 days with diffusivity coefficient of 10-14 m2/s. It demonstrated that material chosen for urea coating would have a diffusion coefficient of 1.49 x 10-14 m2/s to obtain a suitable releasing time for effective fertilization.
| Item Type: | Conference or Workshop Item (Paper) |
|---|---|
| Subjects: | T Technology > T Technology (General) T Technology > TP Chemical technology |
| Academic Subject One: | Academic Department - Chemical Engineering - Process System Engineering |
| Departments / MOR / COE: | Departments > Chemical Engineering Research Institutes > Energy Research Institutes > Institute for Health Analytics |
| ID Code: | 10945 |
| Deposited By: | Anis Shuib |
| Deposited On: | 16 Dec 2013 23:48 |
| Last Modified: | 16 Dec 2013 23:48 |
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