کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7048751 | 1457135 | 2016 | 24 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Effect of the coupling action between volatiles, char and steam on isothermal combustion of coal char
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
جریان سیال و فرایندهای انتقال
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
The effects of the coupling action between volatiles, char and the steam on combustion characteristics of coal char were studied in a customized isothermal thermogravimetric experimental system. The results showed that volatiles released during devolatilization played a key role in the combustion. Heat produced by volatiles combustion accelerated the burning rate of pulverized coal, at the same time, volatiles combustion depleted the oxygen surrounding the char particles. With the decrease of the furnace temperature, the acceleration effect on burning rate due to volatiles combustion improved while its impact to oxygen consuming reduced. The influence of volatiles on burning rate acceleration and oxygen depletion appeared to be inversely affected by the coal rank. When oxygen concentration decreased from 21% to 5% in the reactor, the burning process of volatiles and coal char displayed a tendency of separation. In addition, the presence of steam, which increased the burning rate and reduced the burning time noticeably, had a significant impact on the combustion of coal char.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Applied Thermal Engineering - Volume 93, 25 January 2016, Pages 438-445
Journal: Applied Thermal Engineering - Volume 93, 25 January 2016, Pages 438-445
نویسندگان
Chunbo Wang, Huan Shao, Ming Lei, Yinghai Wu, Lufei Jia,