کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
686996 1460105 2013 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Bubbling fluidization of biomass and sand binary mixtures: Minimum fluidization velocity and particle segregation
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی تکنولوژی و شیمی فرآیندی
پیش نمایش صفحه اول مقاله
Bubbling fluidization of biomass and sand binary mixtures: Minimum fluidization velocity and particle segregation
چکیده انگلیسی


• The minimum fluidization velocity of binary mixtures was experimentally determined.
• Different biomass and sand were investigated.
• Higher diameter ratio inert/biomass caused more pronounced bed segregation.
• Good fluidization regime for binary mixtures was obtained using the smallest sand.
• The proposed correlation is suitable to predict the minimum fluidization velocity.

Understanding the minimum fluidization velocity of biomass and sand mixtures is fundamental to ensuring the optimal performance of fluidized beds in a thermo-conversional process, such as fast pyrolysis. The present work aimed to determine the minimum fluidization velocity of binary mixtures using the characteristic diagram of pressure drop in the bed and to develop an experimental correlation for the minimum fluidization velocity of biomass and sand mixtures. Three types of biomass (sweet sorghum bagasse, waste tobacco and soybean hulls) and four sands with different sizes were investigated. The results showed that the fluid dynamic behavior of binary mixtures is directly related to the biomass size and shape. For sweet sorghum bagasse (more irregular particles), higher biomass percentages led to lower minimum fluidization velocities, which differed from the behaviors observed for waste tobacco and soybean hulls. The diameter ratio inert/biomass effectively influenced the segregation, with a higher ratio causing more pronounced bed segregation. A good fluidization regime (with little segregation) for biomass and sand mixtures was obtained using the smallest sand (d50 = 0.35). Considering the studied operating conditions, the proposed correlation can be used satisfactorily to predict the minimum fluidization velocities for mixtures of biomass and sand in fluidized beds.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Chemical Engineering and Processing: Process Intensification - Volume 72, October 2013, Pages 113–121
نویسندگان
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