FT-i.r. characterization of pitches derived from Avgamasya asphaltite and Raman-Dinçer heavy crude

Autor:	Ekrem Ekinci, H.A. Akrami, Ahmet Akar, M.F. Yardim
Rok vydání:	1997
Předmět:	Softening point Chemistry Vacuum distillation General Chemical Engineering Organic Chemistry Analytical chemistry Energy Engineering and Power Technology Tar Solvent Fuel Technology Elemental analysis Organic chemistry Dehydrogenation Atomic ratio Physics::Chemical Physics Pyrolysis
Zdroj:	Fuel. 76:1389-1394
ISSN:	0016-2361
DOI:	10.1016/s0016-2361(97)00100-2
Popis:	Pitches were prepared by three methods from Avgamasya asphaltite: (1) solvent extraction; (2) pyrolysis followed by vacuum distillation of the resulting tar; (3) air blowing of some of the vacuum-distilled tars. For Raman-Dincer heavy crude oil, only vacuum distillation was used. The chemical changes due to the different processes were studied by Fourier-transform infrared spectroscopy, softening point measurement and elemental analysis. Vacuum distillation and air blowing markedly increased the softening point, promoted dehydrogenation and aromatization through significant reduction of aliphatic structures and reduced the H C atomic ratio. The formation of oxygenated compounds is the major feature of the air blowing technique. The aromaticity and the softening point of solvent-extracted pitches depended on the effectiveness of the solvent.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::ced7642178cc7a1d462242913bdaac00 https://doi.org/10.1016/s0016-2361(97)00100-2 Zobrazit plný text záznamu Full Text from ScienceDirect