N-15 CPMAS NMR of the argonne premium coals

被引：45

作者：

Solum, MS

Pugmire, RJ

Grant, DM

Kelemen, SR

Gorbaty, ML

Wind, RA

机构：

[1] UNIV UTAH, DEPT CHEM, SALT LAKE CITY, UT 84112 USA

[2] EXXON RES & ENGN CO, ANNANDALE, NJ 08801 USA

[3] PACIFIC NW LAB, ENVIRONM & MOL SCI LAB, RICHLAND, WA 99357 USA

来源：

ENERGY & FUELS | 1997年 / 11卷 / 02期

关键词：

D O I：

10.1021/ef960169r

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 [动力工程及工程热物理]; 0820 [石油与天然气工程];

摘要：

N-15 NMR data are reported for the Argonne Premium Coals. Arguments are presented to explain discrepancies between observations and conclusions obtained from NMR experiments and those obtained by XPS and XANES techniques. Detectability of different types of nitrogens is discussed in terms of cross-polarization dynamics together with the effects of the large chemical shift anisotropy that is found in different types of nitrogen functional groups. Data on acid-treated coals confirm the presence of pyridinic type nitrogens that were not observed in a previous N-15 NMR study of coals.

引用

页码：491 / 494

页数：4

共 26 条

[1]

CROSS POLARIZATION AND MAGIC ANGLE SAMPLE SPINNING NMR-SPECTRA OF MODEL ORGANIC-COMPOUNDS .3. EFFECT OF THE C-13-H-1 DIPOLAR INTERACTION ON CROSS POLARIZATION AND CARBON-PROTON DEPHASING [J].