An investigation of the effect of antistripping agents on silica adsorption of asphalt functionalities
- Auburn Univ., AL (USA). Dept. of Chemical Engineering
The authors present an investigation of the effect of precoating antistripping (AS) agents onto silica on the adsorption behavior of model asphalt functionalities. Two commercially available polyamine AS agents were used. Their adsorption onto silica showed a strong surface interaction. One of the AS agents followed the Langmuir adsorption model; the other did not. After removing the weakly adsorbed AS fraction by washing with dichloromethane, seven asphalt functionalities in cyclohexane solution were adsorbed onto the precoated silica. The functionalities used represented those present in asphalt and were carboxylic acids, phenolics, nitrogen bases, sulfoxides, ketones, esters, and polynuclear aromatics. This paper also describes a second set of experiments performed with AS precoated silica that has been washed with distilled water to produce a strongly bound layer impervious to water.
- OSTI ID:
- 7160118
- Journal Information:
- Fuel Science and Technology International; (USA), Journal Name: Fuel Science and Technology International; (USA) Vol. 8:3; ISSN FSCTE; ISSN 0884-3759
- Country of Publication:
- United States
- Language:
- English
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37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201 -- Chemical & Physicochemical Properties
ADSORPTION
ALKANES
AQUEOUS SOLUTIONS
AROMATICS
ASPHALTS
BENZOIC ACID
BITUMENS
CARBOXYLIC ACIDS
CHALCOGENIDES
CHEMICAL REACTION KINETICS
CYCLOALKANES
CYCLOHEXANE
DISPERSIONS
ENERGY SOURCES
ESTERS
EXTRACTION
FOSSIL FUELS
FUELS
HYDROCARBONS
HYDROXY COMPOUNDS
KETONES
KINETICS
METHANE
MINERALS
MIXTURES
MONOCARBOXYLIC ACIDS
ORGANIC ACIDS
ORGANIC COMPOUNDS
OTHER ORGANIC COMPOUNDS
OXIDE MINERALS
OXIDES
OXYGEN COMPOUNDS
PETROLEUM
PETROLEUM FRACTIONS
PHENOLS
REACTION KINETICS
SEPARATION PROCESSES
SILICA
SILICON COMPOUNDS
SILICON OXIDES
SOLUTIONS
SOLVENT EXTRACTION
SORPTION
TAR