A solvent deasphalting dearomatization (SD-A2) process for heavy oil upgradation

Kumar, Rajeev; Chebrolu, Seetaram; Voolapalli, Ravi Kumar; Upadhyayula, Sreedevi

doi:10.1016/j.fuel.2021.121923

Cited by 5 publications

(1 citation statement)

References 37 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This method consists basically of the employment of chemical solvents or additives that promote the flocculation of the asphaltenes, enabling their removal and significantly reducing the oil's viscosity, facilitating its processing, and increasing its market value. [13,[21][22][23][24][25] Therefore, with respect to the phase behaviour of asphaltenes, two approaches can be utilized, with two types of additives, in the function of the objective pursued: stabilization or flocculation of the asphaltenes.…”

Section: Introductionmentioning

confidence: 99%

Polycardanol's potential to deasphalt crude oil: Influence of polymer conversion degree, molar mass, and structure

2023

View full text Add to dashboard Cite

Cardanol is a natural material that acts to stabilize asphaltenes in crude oil. However, its derivative, polycardanol, obtained via cationic polymerization, has divergent behaviour, with reports of its acting both as asphaltenes stabilizer and flocculant. Recently, it was demonstrated that the reaction conditions influence the conversion rates, structures, and molar masses of the products from synthesizing polycardanol initiated with BF3 · O(C2H5)2. Seeking to elucidate the influence of these variables on the phase behaviour of asphaltenes, in this work six products, previously synthesized and characterized, had their performance evaluated by asphaltenes precipitation onset, using n‐heptane titration and monitoring by near‐infrared spectroscopy, using asphaltenes model systems (C5I and C7I) at 1.00 wt./vol.% in toluene. All the products had the ability to flocculate asphaltenes and have potential for deasphalting process. Flocculation efficiency increased with rising molar mass, higher reaction conversion degree, and presence of lateral hydrocarbon chains. The most efficient structures were not affected by the presence of unreacted cardanol. This indicated that the reaction does not require a purification step. Aged cardanol was also able to produce flocculant polymer, indicating that the distillation of cardanol is not required. The cost to obtain a product without needing reagent distillation becomes lower.

show abstract