A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Asphaltenes in Bitumen, What They Are and What They Are Not
Asphaltenes in bitumen and crude oil are generally defined as the fraction which is insoluble in n-heptane. There is also a perceived definition which describes asphaltenes as a very polar, high molecular weight fraction in bitumen. The standard definition and the perceived definition are not identical and thus a lot of confusion has been created. In this paper we conclude that the asphaltenes consist of a very heterogeneous fraction with molecular weights from about 250 g/mol up to 2000 g/mol, with an average of about 750 g/mol. The amount of the hetero atoms nitrogen and oxygen is not enough to make asphaltenes particular polar. A careful examination of the chemistry of asphaltenes reveals that they consist basically of three types of molecules, polycyclic aromatic compounds, n-alkanes with a chain length larger than 40 carbons and metal containing porphyrines.
Asphaltenes in Bitumen, What They Are and What They Are Not
Asphaltenes in bitumen and crude oil are generally defined as the fraction which is insoluble in n-heptane. There is also a perceived definition which describes asphaltenes as a very polar, high molecular weight fraction in bitumen. The standard definition and the perceived definition are not identical and thus a lot of confusion has been created. In this paper we conclude that the asphaltenes consist of a very heterogeneous fraction with molecular weights from about 250 g/mol up to 2000 g/mol, with an average of about 750 g/mol. The amount of the hetero atoms nitrogen and oxygen is not enough to make asphaltenes particular polar. A careful examination of the chemistry of asphaltenes reveals that they consist basically of three types of molecules, polycyclic aromatic compounds, n-alkanes with a chain length larger than 40 carbons and metal containing porphyrines.
Asphaltenes in Bitumen, What They Are and What They Are Not
Redelius, Per (author)
Road Materials and Pavement Design ; 10 ; 25-43
2009-01-01
19 pages
Article (Journal)
Electronic Resource
Unknown
Bitumen , Asphaltenes , Solubility , Porphyrines , Polyaromatic , Structure
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