کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9629111 | 461265 | 2005 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Investigation of the remaining major and trace elements in clean coal generated by organic solvent extraction
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Investigation of the remaining major and trace elements in clean coal generated by organic solvent extraction Investigation of the remaining major and trace elements in clean coal generated by organic solvent extraction](/preview/png/9629111.png)
چکیده انگلیسی
A sub-bituminous Wyodak coal (WD coal) and a bituminous Illinois No. 6 coal (IL coal) were thermally extracted with 1-methylnaphthalene (1-MN) and N-methyl-2-pyrrolidone (NMP) to produce clean extract. A mild pretreatment with acetic acid was also carried out. Major and trace inorganic elements in the raw coals and resultant extracts were determined by means of inductively coupled plasma optical emission spectrometry (ICP-OES), flow injection inductively coupled plasma mass spectrometry (FI-ICP-MS), and cold vapor atomic adsorption spectrometry (CV-AAS). It was found that the extraction with 1-MN resulted in 73-100% reductions in the concentration of Li, Be, V, Ga, As, Se, Sr, Cd, Ba, Hg, and Pb. The extraction with NMP yielded more extract than that with 1-MN, but it retained more organically associated major and trace metals in the extracts. In the extraction of WD coal with NMP, the acid pretreatment not only significantly enhanced the extraction yield but also significantly reduced the concentrations of alkaline earth elements such as Be, Ca, Mg, Sr, and Ba in the extract. In addition, the modes of occurrence of trace elements in the coals were discussed according to their extraction behaviors.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Fuel - Volume 84, Issues 12â13, September 2005, Pages 1487-1493
Journal: Fuel - Volume 84, Issues 12â13, September 2005, Pages 1487-1493
نویسندگان
Jie Wang, Chunqi Li, Kinya Sakanishi, Tetsuya Nakazato, Hiroaki Tao, Toshimasa Takanohashi, Takayuki Takarada, Ikuo Saito,