کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
683119 888995 2010 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Pyrolysis characteristics and kinetics of the marine microalgae Dunaliella tertiolecta using thermogravimetric analyzer
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی تکنولوژی و شیمی فرآیندی
پیش نمایش صفحه اول مقاله
Pyrolysis characteristics and kinetics of the marine microalgae Dunaliella tertiolecta using thermogravimetric analyzer
چکیده انگلیسی

A genus of unicellular green marine microalgae, Dunaliella tertiolecta, was pyrolysed in a thermogravimetric analyzer from room temperature to 900 °C in a highly purified N2 atmosphere at different heating rates of 5, 10, 20, and 40 °C/min. The results showed that three stages appeared in this thermal degradation process, with increasing temperature, initial temperature, and peak temperature of pyrolysis shifting to a higher value as the heating rate increased. The increased heating rate also resulted in increased total volatile matter. The kinetic analysis of the main pyrolysis process used a composite procedure involving the iso-conversional method and the master-plots method. The iso-conversional method indicated that the pyrolysis reaction should conform to a single reaction model with an activation energy of 145.713 kJ mol−1 using Kissinger’s method and 146.421 kJ mol−1 using Flynn–Wall–Ozawa’s method, respectively. The master-plots method suggested that the most probable reaction mechanism was described by an Fn model. Finally, it was estimated that the pre-exponential factor was A = 2.28 × 1013 s−1, the kinetic exponent was n = 2.4, and the reaction model function was f(α) = (1 − α)2.4. The results of this study provide useful information for designing a pyrolytic processing system using microalgae D. tertiolecta as feedstock.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Bioresource Technology - Volume 101, Issue 1, January 2010, Pages 359–365
نویسندگان
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