کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6656608 | 461654 | 2016 | 11 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Experimentation for char combustion kinetics measurements: Bias from char preparation
ترجمه فارسی عنوان
آزمایش برای اندازه گیری های سینتیک سوخت زیستی: اجتناب از آماده سازی چربی
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کلمات کلیدی
احتراق شارژ، پیمرمی تصویربرداری، خواص چرخه، سینتیک واکنش
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
مهندسی شیمی (عمومی)
چکیده انگلیسی
As an alternative to direct use in char burnout kinetics experiments, coal and other solid fuels may be devolatilized and converted to char in a separate step in order to eliminate the influence of volatile release and combustion on measured char conversion properties. In this study, the effects of char preparation conditions on char burnout characteristics during pulverized coal combustion are investigated. Untreated particles of a Colombian high-volatile bituminous coal as well as three chars from that coal, which were externally produced in three different reactors, were tested in a combustion-driven entrained flow reactor. The reactivities of the chars were quantified as pre-exponential factors for commonly employed single-film burnout models, which were estimated from optically measured temperatures and sizes of individual burning particles. The results indicate that char production with devolatilization under heating rates greater than 2Â ÃÂ 104Â K/s yields suitable materials for experimental research on char consumption kinetics. The characteristics of high-heating-rate production methods appear to affect char reactivities only in the early stages of the consumption process (less than 20-25% conversion of the initial char mass).
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Fuel Processing Technology - Volume 151, October 2016, Pages 155-165
Journal: Fuel Processing Technology - Volume 151, October 2016, Pages 155-165
نویسندگان
Nikita Vorobiev, Manfred Geier, Martin Schiemann, Viktor Scherer,