کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10274714 | 461666 | 2016 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Upgrading of low rank coal by hydrothermal treatment: Coal tar yield during pyrolysis
ترجمه فارسی عنوان
ارتقاء زغال سنگ کم با استفاده از روش هیدروترمال: عملکرد تیر زغال سنگ در طول پریولیز
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کلمات کلیدی
زغال سنگ پایین، درمان هیدروترمال تار، پیرولیز، رادیکال آزاد،
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
مهندسی شیمی (عمومی)
چکیده انگلیسی
Hydrothermal treatment of coal was carried out in a lab autoclave at 533Â K for 30Â min and coal pyrolysis was completed in a tube reactor at 873Â K for 15Â min with the heating rate of 5Â K/min. The thermal analysis of the raw and treated coal was compared by thermogravimetric analyzer. The distribution of carbon in coal was detected by solid state 13C nuclear magnetic resonance. The free radical concentrations in coal were determined by electron paramagnetic resonance spectrometer. The results show that hydrothermal treatment is an effective method for upgrading and deoxygenation of low rank coal. The pyrolysis water yields decrease from 9.21Â wt.% of the raw brown coal to 7.40Â wt.% of the treated brown coal. The pyrolysis tar raises about 18% for the treated brown coal and 5% for the treated sub-bituminous. After hydrothermal treatment, the treated coal has lower contents of oxygen functional group and higher percentage of alkyl carbons in comparison with the raw coal, the free radical concentrations in treated coal increase, especially for brown coal, which is the result in the increment of tar yield.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Fuel Processing Technology - Volume 141, Part 1, January 2016, Pages 117-122
Journal: Fuel Processing Technology - Volume 141, Part 1, January 2016, Pages 117-122
نویسندگان
Dexiang Zhang, Peng Liu, Xilan Lu, Lanlan Wang, Tieying Pan,