کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
7063895 1459812 2015 12 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Modeling and parameters fitting of chemical and phase equilibria in reactive systems for biodiesel production
ترجمه فارسی عنوان
مدل سازی و تنظیم پارامترهای تعادل شیمیایی و فاز در سیستم های واکنش پذیر برای تولید بیودیزل
کلمات کلیدی
بیودیزل، بهینه سازی، کم کردن انرژی گیبس، تعادل شیمیایی و فاز، برنامه نویسی غیر خطی،
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی تکنولوژی و شیمی فرآیندی
چکیده انگلیسی
Biodiesel, a non-toxic biodegradable fuel from renewable sources such as vegetable oils, has been developed in order to reduce dependence on crude oil and enable sustainable development. The knowledge of phase equilibrium in systems containing compounds for biodiesel production is valuable, especially in the purification stage of the biodiesel. Nonetheless, the refining process of biodiesel and by-products can be difficult and can elevate the production costs considerably unless it has an appropriate knowledge about the phase separation behavior. In addition, the transesterification reaction yield for producing biodiesel depends upon several operation parameters e.g. the feed molar ratio oil-to-alcohol and the temperature. These parameters were analyzed through a thermodynamic analysis by direct Gibbs energy minimization method in this paper, with the purpose of calculating the chemical and phase equilibrium of some mixtures containing compounds found in biodiesel production. For this, optimization techniques associated with the GAMS® 2.5 software were utilized and the UNIQUAC and NRTL models were applied to represent the non-idealities of the liquid phases. Also, binary interaction parameters of studied compounds were correlated for NRTL and UNIQUAC models by using the least squares principle. The results showed that the use of optimization techniques associated with the GAMS software are useful and efficient tools to calculate the chemical and phase equilibrium by minimizing the Gibbs energy. Moreover, a good agreement was observed in cases in which calculated data were compared with experimental data.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Biomass and Bioenergy - Volume 81, October 2015, Pages 544-555
نویسندگان
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