Terpolymers as Flow Improvers for Mexican Crude Oils

Castro, Laura V.; Vázquez, F.

doi:10.1021/ef101074m

Cited by 57 publications

(36 citation statements)

References 17 publications

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“…The overlap of aromatic ring planes in resin and asphaltene is xed by hydrogen bond, and associated super molecular structure. [1][2][3] When the relative displacement of the crude oil molecules can generate a great internal friction, there is heavy viscosity of crude oil.…”

Section: Introductionmentioning

confidence: 99%

“…Moreover, the reactivity ratios of the monomers employed in the polymerization are different, and the research show that homogeneous terpolymerizations are obtained under monomer-starved conditions in semi-continuous processes independent of reactivity values. 2 In recent years, molecular simulation method was introduced to analyses the interactions among resin, asphaltene and synthesized polymer. Therefore, it is highly desirable for the development of the polymer molecules, which are capable of dispersing or breaking aggregates of resins and asphaltene.…”

Section: Introductionmentioning

confidence: 99%

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Novel terpolymers as viscosity reducing agent for Tahe super heavy oil

et al. 2017

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The four components of extra-heavy oil (saturates, aromatic, resins, asphaltene) were analyzed by chemical separation. The terpolymers with different contents of styrene (S), alkyl chain (MM/DM), and vinyl acetate (V) were designed, synthesized and employed as the viscosity reducers for super heavy oil. Thus, structure and average molecular weight of the oil-soluble terpolymers were measured by Fourier-transform infrared (FTIR) and gel permeation chromatography (GPC), respectively. Comparing with the apparent viscosity of heavy oil in a wide range of shear rates (0.1-200 s À1 ) and temperatures (25-75 C), it can be seen that optimal efficiency could be achieved to reduce viscosity when the terpolymer has a high percentage of long-chain alkyl. Furthermore, the molar ratio between long-chain alkyl groups and aromatic ring as well as molecular weight of terpolymers play a fundamental role in viscosity reduction of super heavy oil. Fig. 9 Temperature effect on the apparent viscosity of the heavy crude oil containing 1 wt% of terpolymer solution.This journal is

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Novel terpolymers as viscosity reducing agent for Tahe super heavy oil

et al. 2017

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“…These techniques include thermal processes, such as in situ combustion and steam-assisted gravity drainage (SAGD) (Cavallaro et al 2008;Moore et al 1999;Greaves et al 2001;Kumar et al 2011;Kapadia et al 2010;Speight 1970;Jiang et al 2005;Fan et al 2004;Maity et al 2010), and cold techniques, such as treatments using diluents like natural gas condensate (Luo et al 2007a, b;James et al 2008;Castro et al 2011;Cavallaro et al 2005). The latter (i.e., cold process) is used to improve the crude oil by dilution or destabilization, and deposition of the asphaltene components in the reservoir by injecting solvents that have a direct impact on viscosity reduction (Luo et al 2007b;Cavallaro et al 2005).…”

Section: Introductionmentioning

confidence: 99%

Kinetics and mechanisms of the catalytic thermal cracking of asphaltenes adsorbed on supported nanoparticles

et al. 2016

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The production of heavy and extra-heavy oil is challenging because of the rheological properties that crude oil presents due to its high asphaltene content. The upgrading and recovery processes of these unconventional oils are typically water and energy intensive, which makes such processes costly and environmentally unfriendly. Nanoparticle catalysts could be used to enhance the upgrading and recovery of heavy oil under both in situ and ex situ conditions. In this study, the effect of the Ni-Pd nanocatalysts supported on fumed silica nanoparticles on post-adsorption catalytic thermal cracking of n-C 7 asphaltenes was investigated using a thermogravimetric analyzer coupled with FTIR. The performance of catalytic thermal cracking of n-C 7 asphaltenes in the presence of NiO and PdO supported on fumed silica nanoparticles was better than on the fumed silica support alone. For a fixed amount of adsorbed n-C 7 asphaltenes (0.2 mg/m 2 ), bimetallic nanoparticles showed better catalytic behavior than monometallic nanoparticles, confirming their synergistic effects. The corrected OzawaFlynn-Wall equation (OFW) was used to estimate the effective activation energies of the catalytic process. The mechanism function, kinetic parameters, and transition state thermodynamic functions for the thermal cracking process of n-C 7 asphaltenes in the presence and absence of nanoparticles are investigated.

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“…Castro studied terpolymers as flow improvers for Mexican crude oils [20]. Alcazar-Vara investigated the wax precipitation in Mexican crude oils [21].…”

Section: Compositionmentioning

confidence: 99%