Asphaltene adsorption at solid surfaces is a ubiquitous phenomenon that begins within the production well and continues through the entire production chain. It is generally an undesirable phenomenon that causes damage within reservoirs, fouling of pipelines and transportation equipment, and fouling of refining and upgrading equipment. However, by virtue of this phenomenon, problematic asphaltenes may also be selectively removed from petroleum streams to produce partially upgraded petroleum, which has significantly improved handling, processing, and upgrading qualities. This review covers many basic aspects regarding the chemical and physical nature of asphaltenes and sorbents related to asphaltene adsorption.

Asphaltene Adsorption, a Literature Review

https://arpi.unipi.it/bitstream/11568/798598/2/polacco%20798598.pdf

A review of the fundamentals of polymer-modified asphalts: Asphalt/polymer interactions and principles of compatibility

Molecular dynamics study of oxidative aging effect on asphalt binder properties

Evaluation of aging behaviors of asphalt binders through different rheological indices

Rheological, microscopic, and chemical characterization of the rejuvenating effect on asphalt binders

Field aging effect on chemistry and rheology of asphalt binders and rheological predictions for field aging

A new fully automated saturates, aromatics, resins, and asphaltenes (SARA) separation for asphalt bitumen and petroleum residua has been developed and optimized. This system performs separations on 2 mg sample portions utilizing four columns packed with different stationary phases. The direction of solvent flow is controlled by automated four-port and six-port switching valves. The asphaltenes precipitate out of solution within a ground polytetrafluoroethylene (PTFE) packed column in an excess of heptane. The heptane-soluble maltenes pass through glass beads, aminopropyl bonded silica, and activated silica packed columns where chromatographic separation of the maltenes occurs. The saturates material is not retained, and it passes through all three adsorption columns. The more highly polar and pericondensed aromatic resins are retained by the glass bead column, and the remaining resins are adsorbed on the aminopropyl silica column. The glass bead column minimizes irreversible adsorption of resins by preven...

The Automated Asphaltene Determinator Coupled with Saturates, Aromatics, and Resins Separation for Petroleum Residua Characterization

The rheological and chemical properties of hydrated lime-polyphosphoric acid (PPA)–modified asphalt binders before and after laboratory oxidative aging were investigated through dynamic shear rheometer (DSR) and nuclear magnetic resonance (NMR) tests. Ten percent by weight of hydrated lime was mixed with 1.5% by weight of PPA-modified asphalt binders. The neat asphalts and multimodified asphalts were subjected to the pressure aging vessel test at a pavement service temperature of 60°C for different durations. The rheological properties of unaged and aged modified asphalts were measured with a DSR at various temperatures. NMR was used to investigate whether hydrated lime reacts with PPA. The rheological results indicate that the addition of hydrated lime to PPA-modified asphalt binders cancels the stiffening effect of PPA. In other words, the addition of PPA to asphalt increases the high-temperature performance grade (PG). The addition of hydrated lime to PPA-modified asphalt removes the benefit of the hig...

Rheological and Chemical Properties of Hydrated Lime and Polyphosphoric Acid–Modified Asphalts with Long-Term Aging

https://hal.archives-ouvertes.fr/hal-02318687/document

Full-scale validation of bio-recycled asphalt mixtures for road pavements

Current asphalt binder production has significantly changed since the Strategic Highway Research Program Superpave days as a result of a number of economic, technical, and environmental reasons. Pe...

Ryan B. Boysen

Papers

Field aging effect on chemistry and rheology of asphalt binders and rheological predictions for field aging

The Automated Asphaltene Determinator Coupled with Saturates, Aromatics, and Resins Separation for Petroleum Residua Characterization

Rheological and Chemical Properties of Hydrated Lime and Polyphosphoric Acid–Modified Asphalts with Long-Term Aging

Full-scale validation of bio-recycled asphalt mixtures for road pavements

Diagnostic Techniques for Various Asphalt Refining and Modification Methods