Abstract
Tar evolution was observed over a temperature range of 150-600 C for four coals. Pittsburgh bituminous, Illinois No.6, Rawhide subbituminous, and Texas lignite. Isolation of the evolved tars in a nitrogen matrix at 15 degrees K produced better resolved infrared spectra than those in a coal matrix, thus enhancing structural characterization of the tar molecules. Two distinct hydroxyl functional groups in the tar molecules free of hydrogen bonding were identified for the first time without interference from H/sub 2/O absorptions. These absorptions at 3626.5 cm/sup -1/ have been assigned to phenolic hydroxyls. It is suggested that carboxylic and aliphatic hydroxyl groups do not survive the vaporization process. Tars from Illinois No.6 were found to contain the largest amount of phenolic hydroxyl; Pittsburgh No. 8 tar contains approximately half of that for Illinois No.6 while Rawhide and Texas lignite contain much less phenolic than either of the other coals. 10 references, 6 figures, 1 table.
Citation Formats
Cannon, S A, Chu, C J, Hange, R H, and Margrave, J L.
Infrared absorption characteristics of hydroxyl groups in coal tars.
United Kingdom: N. p.,
1987.
Web.
doi:10.1016/0016-2361(87)90211-0.
Cannon, S A, Chu, C J, Hange, R H, & Margrave, J L.
Infrared absorption characteristics of hydroxyl groups in coal tars.
United Kingdom.
https://doi.org/10.1016/0016-2361(87)90211-0
Cannon, S A, Chu, C J, Hange, R H, and Margrave, J L.
1987.
"Infrared absorption characteristics of hydroxyl groups in coal tars."
United Kingdom.
https://doi.org/10.1016/0016-2361(87)90211-0.
@misc{etde_6698317,
title = {Infrared absorption characteristics of hydroxyl groups in coal tars}
author = {Cannon, S A, Chu, C J, Hange, R H, and Margrave, J L}
abstractNote = {Tar evolution was observed over a temperature range of 150-600 C for four coals. Pittsburgh bituminous, Illinois No.6, Rawhide subbituminous, and Texas lignite. Isolation of the evolved tars in a nitrogen matrix at 15 degrees K produced better resolved infrared spectra than those in a coal matrix, thus enhancing structural characterization of the tar molecules. Two distinct hydroxyl functional groups in the tar molecules free of hydrogen bonding were identified for the first time without interference from H/sub 2/O absorptions. These absorptions at 3626.5 cm/sup -1/ have been assigned to phenolic hydroxyls. It is suggested that carboxylic and aliphatic hydroxyl groups do not survive the vaporization process. Tars from Illinois No.6 were found to contain the largest amount of phenolic hydroxyl; Pittsburgh No. 8 tar contains approximately half of that for Illinois No.6 while Rawhide and Texas lignite contain much less phenolic than either of the other coals. 10 references, 6 figures, 1 table.}
doi = {10.1016/0016-2361(87)90211-0}
journal = []
volume = {66:1}
journal type = {AC}
place = {United Kingdom}
year = {1987}
month = {Jan}
}
title = {Infrared absorption characteristics of hydroxyl groups in coal tars}
author = {Cannon, S A, Chu, C J, Hange, R H, and Margrave, J L}
abstractNote = {Tar evolution was observed over a temperature range of 150-600 C for four coals. Pittsburgh bituminous, Illinois No.6, Rawhide subbituminous, and Texas lignite. Isolation of the evolved tars in a nitrogen matrix at 15 degrees K produced better resolved infrared spectra than those in a coal matrix, thus enhancing structural characterization of the tar molecules. Two distinct hydroxyl functional groups in the tar molecules free of hydrogen bonding were identified for the first time without interference from H/sub 2/O absorptions. These absorptions at 3626.5 cm/sup -1/ have been assigned to phenolic hydroxyls. It is suggested that carboxylic and aliphatic hydroxyl groups do not survive the vaporization process. Tars from Illinois No.6 were found to contain the largest amount of phenolic hydroxyl; Pittsburgh No. 8 tar contains approximately half of that for Illinois No.6 while Rawhide and Texas lignite contain much less phenolic than either of the other coals. 10 references, 6 figures, 1 table.}
doi = {10.1016/0016-2361(87)90211-0}
journal = []
volume = {66:1}
journal type = {AC}
place = {United Kingdom}
year = {1987}
month = {Jan}
}