Oxygen distribution within oxidised active carbon granules

被引:27
作者
Buczek, B
Biniak, S
Swiatkowski, A
机构
[1] Nicholas Copernicus Univ, Fac Chem, PL-87100 Torun, Poland
[2] Stanislaw Staszic Univ Min & Met, PL-30059 Krakow, Poland
[3] Mil Tech Acad, PL-01489 Warsaw, Poland
关键词
active carbon; oxidation; functional groups;
D O I
10.1016/S0016-2361(99)00063-0
中图分类号
TE [石油、天然气工业]; TK [能源与动力工程];
学科分类号
0807 ; 0820 ;
摘要
The differences in chemical structure within activated carbon granules were estimated for oxidised and unmodified carbon substrates. Samples from various parts of the carbon granules were obtained using the spouted-bed attrition method. A commercial granulated active carbon (Norit R3ex) demineralised with concentrated HF and HCl acids was used. Suitable powdered and core samples were obtained by stripping off successive layers of granules from carbon oxidised with concentrated HNO3 and from unmodified carbon for comparison. The following techniques were employed to characterise the surface properties of these samples: selective neutralisation and pa-metric titration of functional groups, and transmission FTIR spectroscopy. The distribution of oxygen chemically bound to the internal surface of the granules is discussed on the basis of the results. (C) 1999 Elsevier Science Ltd. All rights reserved.
引用
收藏
页码:1443 / 1448
页数:6
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