Structural Characterization of Unfractionated Asphalts by 1H NMR and 13C NMR
| Autor: | Carlos Trujillo, Ferney Betancourt Cardozo, Eliseo Avella Moreno |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
Chemistry
General Chemical Engineering Chemical structure Analytical chemistry Energy Engineering and Power Technology 02 engineering and technology Carbon-13 NMR 010402 general chemistry 01 natural sciences 0104 chemical sciences Characterization (materials science) NMR spectra database Fuel Technology 020401 chemical engineering Characterization methods Proton NMR Physical chemistry 0204 chemical engineering |
| Zdroj: | Energy & Fuels. 30:2729-2740 |
| ISSN: | 1520-5029 0887-0624 |
| DOI: | 10.1021/acs.energyfuels.5b02941 |
| Popis: | An improved methodology for the structural characterization of heavy fractions of petroleum by hydrogen-1 and carbon-13 nuclear magnetic resonance was applied to three fresh and unfractionated asphalts in solution. The results were compared with those generated by two other known characterization methods applied to the same NMR spectra. The comparison revealed inconsistencies in the traditional methods for the structural characterization of this type of materials. The improved methodology can be applied to unfractionated samples, and it provides a more detailed structural characterization of the asphalts than previously obtained. The new method provides a better correlation between physicochemical properties and the chemical structure of the complex mixtures of hydrocarbons. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|