Aggregate adsorption of asphalt functionalities and oxidized asphalt
- Auburn Univ., AL (USA)
The adsorption of asphalt functionalities and asphalt oxidized to different degrees on real and model aggregates has been investigated. The functionalities used were a nitrogen base, phenolic, carboxylic acid, ester, ketone, sulfoxide, and aromatic. Adsorption isotherms of these functionalities on porous silica showed different affinity rankings dependent upon concentration. The competitive affinity ranking of the asphalt functionalities on dried silica was obtained as phenylsulfoxide > quinoline > phenol > benzoic acid > benzophenone > benzylbenzoate > pyrene. The sensitivity to surface moisture of the four most strongly adsorbed compounds was: quinoline > benzoic acid > phenol > phenylsufoxide. Asphalts oxidized to different degrees were adsorbed on different aggregates. On silica and alumina, the oxidized asphalts with viscosities of 32,000 and 126,000 poise adsorbed less than AC-20. On limestone and sandstone, the adsorption of Ac-20 and oxidized asphalts was concentration dependent; asphaltene adsorption followed the same trends. These adsorptions followed the Langmuir isotherm with monolayer coverage decreasing with increased oxidation.
- OSTI ID:
- 5338768
- Report Number(s):
- CONF-8806305--
- Journal Information:
- American Chemical Society, Division of Petroleum Chemistry, Preprints; (USA), Journal Name: American Chemical Society, Division of Petroleum Chemistry, Preprints; (USA) Vol. 33:2; ISSN 0569-3799; ISSN ACPCA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
040500* -- Oil Shales & Tar Sands-- Properties & Composition
ADSORPTION
ADSORPTION ISOTHERMS
ALUMINIUM COMPOUNDS
ALUMINIUM OXIDES
ASPHALTS
BITUMENS
CARBONATE ROCKS
CHALCOGENIDES
CHEMICAL REACTIONS
DATA
EXPERIMENTAL DATA
INFORMATION
ISOTHERMS
LIMESTONE
MINERALS
NUMERICAL DATA
ORGANIC COMPOUNDS
OTHER ORGANIC COMPOUNDS
OXIDATION
OXIDE MINERALS
OXIDES
OXYGEN COMPOUNDS
ROCKS
SANDSTONES
SEDIMENTARY ROCKS
SILICA
SILICON COMPOUNDS
SILICON OXIDES
SORPTION
SORPTIVE PROPERTIES
SURFACE PROPERTIES
TAR
VISCOSITY