کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6747715 | 1429514 | 2018 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Influence of heating rate on reactivity and surface chemistry of chars derived from pyrolysis of two Chinese low rank coals
ترجمه فارسی عنوان
تاثیر درجه حرارت بر روی واکنش پذیری و شیمیایی سطحی از ارقام حاصل از پیرولیز دو ذغال سنگ پایین چین
دانلود مقاله + سفارش ترجمه
دانلود مقاله ISI انگلیسی
رایگان برای ایرانیان
کلمات کلیدی
پیرولیز، زغال سنگ پایین، نرخ گرمایش، واکنش پذیری، پارامتر جنبشی شیمی سطحی،
موضوعات مرتبط
مهندسی و علوم پایه
علوم زمین و سیارات
زمین شناسی اقتصادی
چکیده انگلیسی
A series of char samples were derived from pyrolysis of two typical low-rank coals in China (Shengli lignite and Shenmu bituminous coal) at low, medium and fast heating rates, respectively, to the same pyrolysis temperature 750â¯Â°C. Then these chars were characterized by means of thermogravimetric analysis and Fourier transform infrared spectrometer with the aim to investigate the influence of heating rate in pyrolysis process on gasification reactivity and surface chemistry of them. Besides, a homogeneous model was used to quantitatively analyze the activation energy of gasification reaction. The results reveal that Shengli lignite and its derived chars behave higher gasification reactivity and have less content of oxygen functional groups than Shenmu coal and chars. Meanwhile, chars derived from Shengli lignite at 50â¯Â°C/min and Shenmu coal at 200â¯Â°C/min have the greatest gasification reactivity, respectively. The oxygen functional groups in Shengli lignite are easily thermo-decomposed, and they are less affected by the heating rate, while that in Shenmu coal have a significant change with the variation of heating rate. In addition, there is no good correlation between the change of oxygen functional groups and that of the gasification reactivity of the derived chars from pyrolysis at different heating rates.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Mining Science and Technology - Volume 28, Issue 4, July 2018, Pages 613-619
Journal: International Journal of Mining Science and Technology - Volume 28, Issue 4, July 2018, Pages 613-619
نویسندگان
Liang Dingcheng, Xie Qiang, Li Guangsheng, Cao Junya, Zhang Jun,