Influence of water on 1H CRAMPS n.m.r. spectra of brown coals
β Scribed by Wolf-Dieter Hoffmann; Torsten Schaller; Dieter Michel
- Publisher
- Elsevier Science
- Year
- 1990
- Tongue
- English
- Weight
- 258 KB
- Volume
- 69
- Category
- Article
- ISSN
- 0016-2361
No coin nor oath required. For personal study only.
π SIMILAR VOLUMES
The water associated with a previously air-dried Yallourn brown coal has been studied using nuclear magnetic resonance pulse methods. The intensity and the spin-spin relaxation of the magnetic resonance of the water protons of specimens containing a range of water contents were measured during temp
The kinetic behaviour of 22 brown coals was investigated in direct hydroliquefaction. Yield data of the pseudocomponent formation were obtained from 0.1 1 microautoclave experiments carried out at 450Β°C and reaction times from 0 to 60 min in the presence of tetralin as vehicle and iron sulphate as c
The structure and composition of tars from the flash pyrolysis of one brown and two bituminous Australian coals were investigated by 'H n.m.r. spectroscopy. Reaction times in a fluidized bed were about 1 s. For each tar the aromatic hydrogen content increases slightly with pyrolysis temperature up t
## Abstract ^1^H n.m.r. spectra of 36 derivatives of 6βacetoxyβ2,4βcyclohexadienones were analysed. All available evidence indicates that all members of the series have similar conformations which do not depart significantly from planarity. Substituentβinduced chemical shifts and interproton coupli
The influence of cations on the pyrolysis behaviour of brown coals under flash heating conditions was investigated by means of a small fluidized-bed pyrolyser. A stream of coal particles in nitrogen was injected at rates of l-3 g coal/h directly into a heated bed of sand fluidized by nitrogen. Yield