Please use this identifier to cite or link to this item:
http://hdl.handle.net/1942/3908
Title: | Characterization by C-13 CP/MAS NMR-spectroscopy of the structural-changes in coals after chemical treatments | Authors: | FRANCO, Dirk GELAN, Jan MARTENS, Harry VANDERZANDE, Dirk |
Issue Date: | 1991 | Publisher: | BUTTERWORTH-HEINEMANN LTD | Source: | FUEL, 70(7). p. 811-817 | Abstract: | C-13 CP/MAS spectra have been used for the characterization of two different coal types and their derived products, obtained after mild and severe treatment. The carbon aromaticity (f(a)C) was determined by fitting signal areas in CP/MAS spectra to an expression that describes the evolution of carbon magnetization with the experimental contact time. Proper modification of the CP/MAS pulse sequence allows separation of protonated and non-protonated carbons. This technique is used to determine the carbon aromaticity of the non-protonated carbons. This parameter is related, together with the f(a)C, to the coal structure. Our results are compared with literature data for both coal types. | Notes: | FRANCO, DV, LIMBURGS UNIV CENTRUM,DEPT SBM,B-3590 DIEPENBEEK,BELGIUM. | Keywords: | CARBON 13 NMR; LIQUEFACTION; STRUCTURAL ANALYSIS | Document URI: | http://hdl.handle.net/1942/3908 | DOI: | 10.1016/0016-2361(91)90187-F | ISI #: | A1991FV51400002 | Type: | Journal Contribution |
Appears in Collections: | Research publications |
Show full item record
SCOPUSTM
Citations
15
checked on Sep 2, 2020
WEB OF SCIENCETM
Citations
16
checked on Oct 12, 2024
Page view(s)
64
checked on Jun 13, 2022
Google ScholarTM
Check
Altmetric
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.