Analysis of hydrothermally-treated and weathered coals by X-ray photoelectron spectroscopy (XPS)
Analysis of hydrothermally-treated and weathered coals by X-ray photoelectron spectroscopy (XPS)
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DOI：
10.1016/j.fuel.2008.09.025
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发表时间：
2009-04-01
期刊：
影响因子：
7.4
通讯作者：
Ohki, Akira
中科院分区：
文献类型：
--
作者：
Geng, Wenhua;Kumabe, Yasutaka;Ohki, Akira
用X射线光电子能谱（XPS）对水热处理煤和风化煤进行了分析，XPS C（1 s）谱和N（1 s）谱分别被解析为C-C/C=C/C-H、C-O、C=O和O-C=O四个峰和吡啶-N三个峰。吡咯-N和季铵-N）。水热处理后，碳氧化合物的数量减少，吡啶态氮的比例增加，季铵态氮的比例减少。另一方面，一些烟煤进行自然风化和实验室氧化，这给出了相反的结果相比，水热处理。从水热作用和风化（氧化）作用的角度，讨论了碳氧和有机氮形态的变化。此外，对各种煤（43种SS煤）进行XPS分析，并根据煤阶（碳含量）讨论了碳氧和有机氮形态的量。(C)2008爱思唯尔有限公司保留所有权利。
Analysis of hydrothermally-treated and weathered coals by X-ray photoelectron spectroscopy (XPS) was carried out, and the XPS C(1s) and N(1s) spectra obtained were curve-resolved into four peaks (C-C/C=C/C-H, C-O, C=O, and O-C=O) and three peaks (pyridinic-N. pyrrolic-N, and quaternary-N), respectively. Upon hydrothermal treatment, the amount of carbon-oxygen forms decreased; while the ratio of pyridinic-N increased and quaternary-N decreased. On the other hand, some bituminous coals were subjected to natural weathering and laboratory oxidation, which gave opposite results compared to the hydrothermal treatment. The changes in the carbon-oxygen and organic nitrogen forms were discussed in terms of the effect of hydrothermal treatment and weathering (oxidation). Also, the XPS analysis of various kinds of coals (43 SS coals) was carried out, and the amounts of carbon-oxygen and organic nitrogen forms were discussed in terms of coal rank (carbon content). (C) 2008 Elsevier Ltd. All rights reserved.