Adsorption and Thermal Desorption Behaviour of Asphalt-like Functionalities on Silica
The adsorption and thermal desorption behaviours of seven model compounds containing asphalt-like functionalities were studied on silica. Adsorption isotherms of the model compounds were examined at 25°C and analyzed via the Langmuir isotherm. A series of temperature-programmed desorption (TPD) expe...
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| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
| Published: |
SAGE Publishing
2000-10-01
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| Series: | Adsorption Science & Technology |
| Online Access: | https://doi.org/10.1260/0263617001493729 |
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| Summary: | The adsorption and thermal desorption behaviours of seven model compounds containing asphalt-like functionalities were studied on silica. Adsorption isotherms of the model compounds were examined at 25°C and analyzed via the Langmuir isotherm. A series of temperature-programmed desorption (TPD) experiments was also conducted on the silica samples, the activation energy for desorption (E d ) being determined by conventional TPD analysis. The adsorption and thermal desorption behaviours were correlated in terms of the activation energy (E d tot ) for complete desorption. Dimethyl sulphoxide showed the strongest adsorption and the largest value for E d tot , implying that the high energy consumption necessary to desorb such functionalities plays a key role in the durability of asphalt–aggregate bonding. |
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| ISSN: | 0263-6174 2048-4038 |