Estudo da interatividade entre macromoléculas asfaltênicas e compostos estabilizantes: LCC e Cardanol

Abstract

O asfalteno contido no petróleo pode se depositar gerando inúmeros problemas que podem afetar não só a produção, mas também todas as etapas que envolvem o transporte, armazenamento e processamento do óleo cru. Este trabalho apresenta uma adaptação matemática de modelos de interatividade para o sistema asfalteno/estabilizante capaz de prever o desempenho do estabilizante em evitar a precipitação de asfalteno. A capacidade do líquido da casca da castanha de caju (LCC) e de um dos seus derivados, o cardanol, foi estudada empregando-se o teste de peptização. Tanto o LCC quanto o cardanol apresentaram propriedades estabilizadoras de asfaltenos e exibiram interatividade positiva em ambos os casos.

Flocculation of Asphaltenes by Polymers: Influence of Polymer Solubility Conditions

“…Knowledge of the interaction mechanism sheds light on the exact position and nature of the sites involved in the interaction, the relations among the molecules involved (including solvent molecules), the system’s energy at each stage of the process, and how fast all the changes occur . Evidently, it is very difficult to clarify all these points, especially when dealing with high complexity involving molecules of various natures and sizes, such as petroleum. , …”

Interfacial Films of Calcium Naphthenate: Influence of Polycardanol Structures

“…The three peaks at 998, 943, and 911 cm −1 are related to the C−H vibration of conjugated cis− trans double bond, nonconjugated trans double bond, and terminal vinyl group in the unsaturated moiety. 32,33 When comparing spectra of polycardanol samples and cardanol, slight differences are noticed. By increasing initiator concentration, the intensity of the peak at 3010 cm −1 decreases, indicating the decrease of the unsaturations during the polymerization.…”

Cardanol/SiO2 Nanocomposites for Inhibition of Formation Damage by Asphaltene Precipitation/Deposition in Light Crude Oil Reservoirs. Part I: Novel Nanocomposite Design Based on SiO2–Cardanol Interactions

“…Some of the green solvents used commonly are terpene, methyl ester, ethyl lactate, and cardanol . The last one is separated from the cashew nut shell liquid by vacuum distillation that contains several isomers of 3-(pentyldecil) phenol molecules . The reduction in the asphaltene precipitation is carried out via acid–base and the steric stabilization provided by the hydrocarbon tail .…”

“…23 The last one is separated from the cashew nut shell liquid by vacuum distillation that contains several isomers of 3-(pentyldecil) phenol molecules. 24 The reduction in the asphaltene precipitation is carried out via acid−base and the steric stabilization provided by the hydrocarbon tail. 25 Since the cashew nut shell liquid is a bioproduct of the cashew nut industry and cardanol is biodegradable, widely available, and act as an inhibitor of asphaltene aggregation, it is considered as a green solvent for asphaltenes present in crude oil.…”