Solid-state C-13 CP/MAS NMR study of Baganuur coal, Mongolia: Oxygen-loss during coalification from lignite to subbituminous rank

被引:125
作者
Erdenetsogt, Bat-Orshikh [1 ,3 ]
Lee, Insung [1 ]
Lee, Sung Keun [1 ]
Ko, Yoon-Joo [2 ]
Bat-Erdene, Delegiin [3 ]
机构
[1] Seoul Natl Univ, Sch Earth & Environm Sci, Seoul 151747, South Korea
[2] Seoul Natl Univ, Natl Ctr Interuniv Res Facil, Seoul 151742, South Korea
[3] Natl Univ Mongolia, Fac Earth Sci, Ulaanbaatar 210646A, Indonesia
关键词
Lignite; NMR; Coalification; Oxygen groups; Mongolia; NUCLEAR-MAGNETIC-RESONANCE; BROWN-COAL; WOOD; PEAT; SPECTROSCOPY; VITRINITE; CARBON; PEATIFICATION; REARRANGEMENT; PYROLYSIS;
D O I
10.1016/j.coal.2010.02.005
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
080707 [能源环境工程]; 082001 [油气井工程];
摘要
The rank of Lower Cretaceous Baganuur coal from Mongolia ranges from lignite to subbituminous coal, indicating transition from biochemical to physico-chemical coalification stages. The changes in the chemical structure of coal were studied using solid-state C-13 CP/MAS NMR. The predominant change during the transition between the two coalification stages was the dramatic decrease in dihydric and/or methoxy phenols. Concurrently. protonated aromatic carbon positioned next to O-substituted carbon decreased drastically, while C-substituted aromatic carbon increased. These changes indicate that O-containing functional group was continuously replaced by C-substituent. In addition, the amount of carbonyl and oxygenated aliphatic carbons decreased. All these transformations were greatly intensified at the beginning of the physico-chemical stage. The results, based on the chemical structure of inertinite-rich coal, suggest that during the fusinitization path, small amounts of hydrogen and oxygen remained as H- and OH-substituents of condensed aromatic rings, while other functional groups were completely destroyed. During the coalification from lignite to subbituminous rank, oxygen is significantly changed compared with carbon and hydrogen due to the elimination of oxygen-containing functional groups especially from dihydric phenol, methoxyl, and carbonyl carbon. (C) 2010 Elsevier B.V. All rights reserved.
引用
收藏
页码:37 / 44
页数:8
相关论文
共 36 条
[1]
Rearrangement of carbon and nitrogen forms in peat after progressive thermal oxidation as determined by solid-state 13C and 15N-NMR spectroscopy [J].
Almendros, G ;
Knicker, H ;
González-Vila, FJ .
ORGANIC GEOCHEMISTRY, 2003, 34 (11) :1559-1568
[2]
SOLID-STATE C-13 NUCLEAR-MAGNETIC-RESONANCE STUDY OF CANADIAN COALS [J].
AXELSON, DE .
FUEL PROCESSING TECHNOLOGY, 1987, 16 (03) :257-278
[3]
Rearrangement of bacterial community structure during peat diagenesis [J].
Barkovskii, Andrei L. ;
Fukui, Hirokazu ;
Leisen, Johannes ;
Kim, Sang-Hoon ;
Marsh, Terence L. ;
Khijniak, Anna I. .
SOIL BIOLOGY & BIOCHEMISTRY, 2009, 41 (01) :135-143
[4]
BATERDENE D, 1998, MONGOLIAN COAL DEPOS
[5]
BATERDENE D, 1989, GEOLOGY EXPLORATION, P114
[6]
ARTIFICIAL COALIFICATION OF A FOSSIL WOOD FROM BROWN COAL BY CONFINED SYSTEM PYROLYSIS [J].
BEHAR, F ;
HATCHER, PG .
ENERGY & FUELS, 1995, 9 (06) :984-994
[7]
Investigation of reaction pathways involved in lignin maturation [J].
Buchanan, AC ;
Britt, PF ;
Struss, JA .
ENERGY & FUELS, 1997, 11 (01) :247-248
[8]
Diessel CFK, 1992, COAL BEARING DEPOSIT, P41
[9]
The stratigraphic distribution of inertinite [J].
Diessel, Claus F. K. .
INTERNATIONAL JOURNAL OF COAL GEOLOGY, 2010, 81 (04) :251-268
[10]
The Baganuur coal deposit, Mongolia: depositional environments and paleoecology of a Lower Cretaceous coal-bearing intermontane basin in Eastern Asia [J].
Dill, HG ;
Altangerel, S ;
Bulgamaa, J ;
Hongor, O ;
Khishigsuren, S ;
Majigsuren, Y ;
Myagmarsuren, S ;
Heunisch, C .
INTERNATIONAL JOURNAL OF COAL GEOLOGY, 2004, 60 (2-4) :197-236