کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
4768874 | 1425380 | 2017 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Mechanistic influences of different solvents on microwave-assisted extraction of Shenfu low-rank coal
ترجمه فارسی عنوان
تأثیر مکانیکی حلال های مختلف بر استخراج مایکروویو از زغال سنگ کم شنفو
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کلمات کلیدی
زغال سنگ کم استخراج کمک مایکروویو، ترکیبات معطر چند حلقه ای، قطب حلال،
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
مهندسی شیمی (عمومی)
چکیده انگلیسی
Microwave-assisted extractions (MAEs) were carried out on Shenfu (SF) low-rank coal using four types of solvent, namely tetrahydrofuran, methanol, dichloromethane and ethyl acetate. Comparison with the traditional thermal extractions (TEs) indicated that MAEs were much more efficient in extracting organic components of SF coal. A large amount of aromatic compounds with 2-3 rings and rich branched alkanes could be extracted from coal by MAE. The results also showed that solvent polarity and the interaction between solvent and functional groups abundant in the extracts were the two main factors leading to differences of their MAE. Among the studied solvents, tetrahydrofuran could extract much more amount of polar compounds and its solution was rich in highly-condensed polycyclic aromatic compounds (PACs) with â¥Â 4 rings. And this feature had relationship with its strongest interaction with the CO bond. Ethyl acetate, in contrast, showed strong interaction with the CO bonds and had good potential for the extraction of low-polarity compounds especially PACs with two aromatic rings and aliphatic compounds with long alkane chains. And for methanol and dichloromethane, their solvent polarity played dominant roles during the MAE procedures. The results provided more detailed mechanistic influences of different solvents on MAE of coal, and would help for the identification of a suitable solvent for efficient detection of components in organic substances, especially the extraordinary complex compounds in coal.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Fuel Processing Technology - Volume 166, November 2017, Pages 276-281
Journal: Fuel Processing Technology - Volume 166, November 2017, Pages 276-281
نویسندگان
Liangping Zhang, Song Hu, Syed Shatir A. Syed-Hassan, Zhe Xiong, Yiming Xiao, Long Jiang, Kai Xu, Yi Wang, Sheng Su, Yingbiao Zhou, Jun Xiang,