Analysis of hydrothermally-treated and weathered coals by X-ray photoelectron spectroscopy (XPS)

被引：92

作者：

Geng, Wenhua ^{[1
]}

Kumabe, Yasutaka ^{[1
]}

Nakajima, Tsunenori ^{[1
]}

Takanashi, Hirokazu ^{[1
]}

Ohki, Akira ^{[1
]}

机构：

[1] Kagoshima Univ, Fac Engn, Dept Bioengn, Kagoshima 8900065, Japan

来源：

FUEL | 2009年 / 88卷 / 04期

关键词：

Coal; X-ray photoelectron spectroscopy; Nitrogen forms; Hydrothermal treatment; Weathering; LOW-TEMPERATURE OXIDATION; ARGONNE PREMIUM COALS; BITUMINOUS COAL; SURFACE; QUANTIFICATION; KINETICS; 398-K;

D O I：

10.1016/j.fuel.2008.09.025

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：

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.

引用

页码：644 / 649

页数：6

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