کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6634337 | 461113 | 2016 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Combustion of single char particles from Victorian brown coal under oxy-fuel fluidized bed conditions
ترجمه فارسی عنوان
احتراق ذرات تک کاراکتر از ذغال سنگ قهوه ای ویکتوریا در شرایط تخت مایع ذرات اکسین
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کلمات کلیدی
اکسی سوخت بستر سیال، ذرات تک زغال سنگ قهوه ای، احتراق
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
مهندسی شیمی (عمومی)
چکیده انگلیسی
Combustion performance of individual and large spherical single char particles of 5-6 mm diameter during oxy-fuel fluidized bed (Oxy-FB) combustion is investigated. These char particles were prepared from briquetted Victorian brown coal. In these experiments, a thin thermocouple was inserted inside each char particle to monitor the particle temperature during the experiment. Particle temperature was observed to be higher compared to the bed temperature which varied between 880 °C and 925 °C. Up to 48 °C difference was noticed between the char particle temperature and the bed temperature using 15% steam in oxy-fuel combustion atmosphere. A kinetic model on char combustion was developed to calculate the combustion time, carbon consumption rate and the particle diameter as a function of time in an atmosphere consisting of O2, CO2 and steam. It was evident that boundary-layer oxygen diffusion controlled the carbon combustion rate during oxy-fuel fluidized bed combustion of these brown coal char particles. The gasification reactions were almost negligible for the feed gases and temperature range applicable for Oxy-FB combustion.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Fuel - Volume 165, 1 February 2016, Pages 477-483
Journal: Fuel - Volume 165, 1 February 2016, Pages 477-483
نویسندگان
Bithi Roy, Sankar Bhattacharya,