X-ray Analysis of Liquid-Treated Coals. 1. Effects of Pyridine on the Short-Range Structuring in Beulah Zap Lignite
Document Type
Article
Publication Date
7-1-1998
Department
Chemistry and Biochemistry
School
Mathematics and Natural Sciences
Abstract
The X-ray scattering curves are statistically indistinguishable, except for a small difference at very low angle, for a sample of “as received” Beulah Zap lignite and for the Beulah Zap which has been dried at 107 °C in a convection oven. The addition of pyridine to Beulah Zap causes a significant change in the X-ray scattering curves obtained in the 1.0−2.5 Å-1 region of reciprocal space, and this difference is also found in the resulting structure curves which have been calculated in molecular (real) space. A model that suggests pyridine is hydrogen bonded to the oxygens contained in attachments which are covalently bonded to the “planar” C9 units of Beulah Zap has been suggested, and both the specific and the average atom-pair distances calculated from this model are consistent with the structure function calculated from the X-ray scattering curve of the BZ-PYR sample.
Publication Title
Energy and Fuels
Volume
12
Issue
4
First Page
697
Last Page
703
Recommended Citation
Wertz, D. L.,
Quin, J. L.
(1998). X-ray Analysis of Liquid-Treated Coals. 1. Effects of Pyridine on the Short-Range Structuring in Beulah Zap Lignite. Energy and Fuels, 12(4), 697-703.
Available at: https://aquila.usm.edu/fac_pubs/5018