1982
DOI: 10.1016/0016-2361(82)90014-x
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FTIR analaysis of coal. 1. techniques and determination of hydroxyl concentrations

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Cited by 183 publications
(54 citation statements)
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“…En la región del espectro entre 1470 y 1400 cm-1, correspondiente a las flexiones H-C-H (Solomon, 1982;Solomon, 1988), se observa una banda intensa en los carbones de Santander, que disminuye ligeramente en los de Cundinamarca y confirma que todos los carbones estudiados presentan unidades alquílicas. Estos resultados indican que los carbones de Santander tienen menor rango que los de Cundinamarca, lo cual se confirma teniendo en cuenta el diagrama de Van Krevelen discutido previamente, en el que se observan relaciones atómicas O/C similares con menores relaciones atómicas H/C para los carbones de Cundinamarca.…”
Section: Cenizas (%M Bs)unclassified
“…En la región del espectro entre 1470 y 1400 cm-1, correspondiente a las flexiones H-C-H (Solomon, 1982;Solomon, 1988), se observa una banda intensa en los carbones de Santander, que disminuye ligeramente en los de Cundinamarca y confirma que todos los carbones estudiados presentan unidades alquílicas. Estos resultados indican que los carbones de Santander tienen menor rango que los de Cundinamarca, lo cual se confirma teniendo en cuenta el diagrama de Van Krevelen discutido previamente, en el que se observan relaciones atómicas O/C similares con menores relaciones atómicas H/C para los carbones de Cundinamarca.…”
Section: Cenizas (%M Bs)unclassified
“…[12][13][14] Numerous studies previously dealt with chemical functional groups of various coals using FT-IR. [15][16][17][18][19] Recently, Geng et al 20) proved that there is a close relationship between the aromaticity of raw coals and the ratio of peak areas of aromatic CH and aliphatic CH (A aroCH /A aliCH ) evaluated by simple FT-IR measurement without using solid state 13 C NMR. Several studies already reported that the ratio of peak areas of aromatic CH and aliphatic CH in raw coals is closely related to coal properties such as reflectance and fluidity.…”
Section: Introductionmentioning
confidence: 99%
“…Spectra of the sorbents characteristically had a broad absorption band with several maxima (ν max ) in the range 3800-2000 cm -1 . This spectral region includes stretching vibrations of OH or NH groups bound through Hbonds where NH groups in charcoals that are free and bound by a H-bond absorb as a rule at ν max = 3490 and 3425 cm -1 [11,12]. Residual aromatic CH groups can also absorb in the range 3100-3000 cm -1 in spectra of charcoals.…”
mentioning
confidence: 99%