Asphaltene derived from brown coal was hydrogenated in the temperature range 375-450ยฐC with and without the addition of a sulphided nickel molybdate catalyst at initial hydrogen pressures from 2 to 10 MPa and the products were characterized by elemental analysis, non-aqueous titration for acidic oxy
The chemical nature of asphaltenes from some coal liquefaction processes
โ Scribed by Colin E. Snape; William R. Ladner; Leonidas Petrakis; Bruce C. Gates
- Publisher
- Elsevier Science
- Year
- 1984
- Tongue
- English
- Weight
- 567 KB
- Volume
- 8
- Category
- Article
- ISSN
- 0378-3820
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๐ SIMILAR VOLUMES
Aslphaltenes are difficult to characterize by any procedure that involves chromatography. In an attempt to obtain useful information on unfractionated asphaltenes and their structural relations to their parent coals, asphaltenes from a set of eight coals of hvA rank and different coalification histo
into which oxygen-containing gasification agents and optionally recycled solids are fed. The height of the conical section is greater by a factor of I-h than the diameter of the cylindrical section. In the fluidized bed, a uniform radial gas flow profile is generated in every horizontal cross-sectio
01 Solid fuels {preparation) dichloromethane and the average molecular weight of the extracts were detected. The degree of conversion of the coals studied to the products solubility in dichloromethane was found to be surprisingly high regarding the low-rank coals. This paper puts forward an hypothes