Study of the effect of Eucalyptus globulus lignin and Schinus terebinthifolius tannin extract on water in oil emulsions of heavy oil

Silva, Mayara da; Sad, Cristina M. S.; Pereira, Laíne B.; Corona, Rayane R.B.; Santos, Francine D.; Kuster, Ricardo Machado; Castro, Eustáquio Vinícius Ribeiro de; Filgueiras, Paulo R.

doi:10.1016/j.fuel.2019.116816

Cited by 4 publications

(3 citation statements)

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“…Grape residue produced in the wine industry was used as an asphalt antioxidant (Calabi-Floody and Thenoux, 2012), and its principle was similar to that of lignin as an antioxidant. In addition, lignin was used as an asphalt emulsifier (da Silva et al, 2020) and asphalt coupling agent. In the construction field, lignin was used as a stabilizer to strengthen the soil for civil engineering construction (Liu et al, 2020b).…”

Section: Effect Of Lignin In Pavement Engineeringmentioning

confidence: 99%

Review on Applications of Lignin in Pavement Engineering: A Recent Survey

et al. 2022

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Lignin is the second-largest plant polymer on Earth after cellulose. About 98% of lignin produced in the papermaking and pulping industry is used for combustion heating or power generation. Less than 2% of lignin is used in more valuable fields, mainly in the formulation of dispersants, adhesives, and surfactants. Asphalt is one of the most important materials in pavement engineering. It is a dark brown complex mixture composed of hydrocarbons with different molecular weights and their non-metallic derivatives. Because the chemical structure of lignin is similar to that of asphalt, it is a carbon-based hydrocarbon material. More researchers studied the application of lignin in pavement engineering. In this paper, the structure, application, and extraction technology of lignin were summarized. This is a review article describing the different applications of lignin in pavement engineering and exploring the prospects of the application. There are three main types of pavement materials that can be used for lignin in pavement engineering, which are asphalt, asphalt mixture, and roadbed soil. In asphalt, lignin can be used as a modifier, extender, emulsifier, antioxidant, and coupling agent. In asphalt mixtures, lignin can be used as an additive. In road base soils, lignin can be used as a soil stabilizer. Furthermore, the article analyzed the application effects of lignin from the life cycle assessment. The conclusions suggest that lignin-modified asphalt exhibits more viscosity and hardness, and its high-temperature resistance and rutting resistance can be significantly improved compared with conventional asphalt. In addition, some lignin-modified asphalt binders exhibit reduced low-temperature crack resistance and fatigue resistance, which can be adjusted and selected according to the climate change in different regions. The performance of lignin as an asphalt mixture additive and asphalt extender has been proved to be feasible. Lignin can also produce good mechanical properties as well as environmental benefits as a soil stabilizer. In summary, lignin plays an important role in asphalt pavement and roadbed soil, and it is likely to be a development trend in the future due to its environmental friendliness and low cost. More research is needed to generalize the application of lignin in pavement engineering.

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Section: Effect Of Lignin In Pavement Engineeringmentioning

confidence: 99%

Review on Applications of Lignin in Pavement Engineering: A Recent Survey

et al. 2022

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“…If the active substances of heavy oil are adsorbed on the interface, a W/O emulsion would form. Oil-in-water (O/W) emulsion would form if the active substance of water solution (such as chemical flooding would add some active substances into the water phase) is adsorbed on the interfacial film. − Active substances in heavy oil gradually adsorb on the oil–water interface under the shear action of porous media, forming a stable interface film with certain strength because there are no active substances adding into the water phase during water/steam flooding. − Most of the natural emulsifiers (active substances) in heavy oil have lipophilic and hydrophobic properties, so they generally form a stable W/O emulsion. , Natural emulsifiers in heavy oil are adsorbed on the oil–water interface to form a viscoelastic film with a certain strength, which creates kinetic obstacles to the coalescence of water droplets and stabilizes the W/O emulsion. − …”

Section: Introductionmentioning

confidence: 99%

“…34−36 Most of the natural emulsifiers (active substances) in heavy oil have lipophilic and hydrophobic properties, so they generally form a stable W/O emulsion. 37,38 Natural emulsifiers in heavy oil are adsorbed on the oil−water interface to form a viscoelastic film with a certain strength, which creates kinetic obstacles to the coalescence of water droplets and stabilizes the W/O emulsion. 39−41 According to the emulsion theory, the formation oil emulsion requires three conditions: (1) oil and water phases, (2) emulsifiers, and (3) suitable stirring or shearing action.…”

Section: Introductionmentioning

confidence: 99%

Experimental Study of Produced Fluid Emulsification during Water/Steam Flooding for Heavy Oil Recovery

Liu

He³

et al. 2022

Energy Fuels

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Active substances such as asphaltene and resin in heavy oil tend to absorb on the oil–water interface. Thus, heavy oil and water would easily emulsify into water-in-oil (W/O) emulsion under the shared action of formation porous media. Emulsification of produced fluid during heavy oil recovery is important for accurately calculating the oil recovery. Studies on the properties of produced fluid can effectively forecast the reservoir production dynamics. Therefore, water/steam flooding experiments at different permeabilities, heavy oil viscosity, and varying temperature were performed using long sand-packed tubes. Accordingly, the flooding dynamics, emulsification states, viscosity, droplet size distribution, and oil recovery deviation rate (ORDR) were analyzed. The results show that produced oil is W/O emulsion during water/steam flooding heavy oil. The water content of the produced oil is mainly affected by temperature and can be as high as 30% in the middle and late stages when the temperature is higher than 150 °C. Because the layered stacking structure of asphaltene and resin weakens as temperature increases, they absorb more easily on the oil–water interface. The water content of produced oil the in middle stages is as high as 40% when the temperature is 250 °C, and the ORDR is as high as 50.28%. Furthermore, the water droplet size increases with increase in permeability and temperature, but it is not obviously affected by heavy oil viscosity. The evaporation of light components is significant when the temperature is higher than 150 °C. In particular, the percentages of asphaltene and resin would increase with the evaporation of light components. Thus, W/O emulsion would form more easily during water/steam flooding, and hence, the efficient development of heavy oil would become difficult in the middle and late stages.

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