کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
4980978 | 1453333 | 2017 | 17 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Physicochemical properties of Hebi semi-coke from underground coal gasification and its adsorption for phenol
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
بهداشت و امنیت شیمی
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چکیده انگلیسی
Groundwater pollution caused by underground coal gasification (UCG) as well as its purification is a great concern for scientific and engineering community. In the present study, a UCG model test of Hebi coal was carried out by air/steam two-stage gasification method. The physicochemical properties of UCG residual semi-coke samples were characterized by SEM, nitrogen adsorption at 77Â K and FTIR, respectively. Adsorption experiments of phenol onto semi-coke samples were also performed. The results can be summarized as follows: (a) obvious cracks and small voids were observed in semi-coke samples; (b) compared with raw coal, semi-coke presented a larger BET surface area of 21.6Â m2/g, larger pore volume of 0.087Â cm3/g and wider pore size distribution with micro pores in size of 1.5-2Â nm; (c) surface functional groups such as hydroxyl and carbonyl were partially preserved after gasification; (d) and the maximum removal rate of phenol approximately reached 35%. The dispersion forces between Ï electrons of aromatic nucleus in semi-coke and phenol ring and the formation of electron donor-acceptor complex make it work for phenol adsorption.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Process Safety and Environmental Protection - Volume 107, April 2017, Pages 147-152
Journal: Process Safety and Environmental Protection - Volume 107, April 2017, Pages 147-152
نویسندگان
Bing Xu, Lunjian Chen, Baolin Xing, Zhengxin Li, Le Zhang, Guiyun Yi, Guangxu Huang, Manoj K. Mohanty,