Synthesis and properties of polyacrylamide by nanoparticles, effect nanoclay on stability polyacrylamide solution

Cheraghian, Goshtasp

doi:10.1049/mnl.2016.0419

Cited by 40 publications

(18 citation statements)

References 17 publications

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“…Consequently, some catalytic agents such as nanoparticles have been used for the adsorption [21,22,23,24,25] and subsequent transformation of the asphaltenes [26,27,28,29,30,31]. This is due to nanoparticle properties, such as size, surface area, and surface energy density, among others, that favors the application to the HO and EHO reservoirs [13,20,21,25,31,32,33,34,35,36,37,38]. Some nanoparticles that have been used in steam gasification [25] are derived from transition element oxides, such as nanoparticles of Co 3 O 4 , NiO, Fe 3 O 4 [20].…”

Section: Introductionmentioning

confidence: 99%

Influence of the Ce4+/Ce3+ Redox-Couple on the Cyclic Regeneration for Adsorptive and Catalytic Performance of NiO-PdO/CeO2±δ Nanoparticles for n-C7 Asphaltene Steam Gasification

et al. 2019

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The main objective of this study is to evaluate the regenerative effect of functionalized CeO2±δ nanoparticles with a mass fraction of 0.89% of NiO and 1.1% of PdO in adsorption and subsequent decomposition of n-C7 asphaltenes in steam gasification processes. During each regeneration cycle, the adsorption capacity and the catalytic activity of the nanoparticles were evaluated. To estimate the adsorption capacity of the nanoparticles, adsorption kinetics were studied at a fixed concentration of n-C7 asphaltenes of 10 mg·L−1 as well as adsorption isotherms at three different temperatures at 25 °C, 55 °C, and 75 °C. To evaluate the catalytic activity, the loss of mass of the nanoparticles was evaluated by isothermal conversions with a thermogravimetric analyzer at 230 °C, 240 °C, and 250 °C, and at non-isothermal conditions involving a heating from 100 °C to 600 °C at a 20 °C·min−1 heating rate. The asphaltenes showed a high affinity for being adsorbed over the nanoparticles surface, due to the nanoparticles-asphaltene interactions are stronger than those that occur between asphaltene-asphaltene, and this was maintained during nine evaluated regeneration cycles as observed in the Henry’s constant that increased slightly, with changes of 21%, 26% and 31% for 25 °C, 55 °C and 75 °C. Polanyi’s adsorption potential decreases by 2.6% for the same amount adsorbed from the first cycle to the ninth. In addition, the catalytic activity of the nanoparticles did not change significantly, showing that they decompose 100% of the n-C7 asphaltenes in all cycles. However, the small decrease in the adsorption capacity and catalytic activity of the nanoparticles is mainly due to the presence and change in concentration and ratio of certain elements such as oxygen, iron or others at the surface of the nanoparticle as shown by X-ray photoelectron spectroscopy (XPS) analyses. Thermodynamic parameters of adsorption such as Δ H a d s o , Δ S a d s o , and Δ G a d s o and the effective activation energy (Ea) were calculated to compare adsorptive and catalytic performance during each cycle. There is an increase of 9.3% and 2.6% in the case of entropy and enthalpy, respectively, and a decrease of 0.5%, 3.1% and 6.5% for 25 °C, 55 °C and 75 °C respectively for the Gibss free energy from cycle 1 to cycle 9. It was found that these parameters are correlated with the Ce concentration and oxidation state ratios (Ce3+/Ce4+ couple) at the surface.

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Section: Introductionmentioning

confidence: 99%

Influence of the Ce4+/Ce3+ Redox-Couple on the Cyclic Regeneration for Adsorptive and Catalytic Performance of NiO-PdO/CeO2±δ Nanoparticles for n-C7 Asphaltene Steam Gasification

et al. 2019

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“…From a broader perspective, our findings of molecular interactions between nanoparticles and bitumen will open up a new avenue that will be an inspiration in the nanotechnology concept in asphalt. Clay/silica was prepared with hydrothermal syntheses method using a procedure adapted from Yang et al 51 and Cheraghian et al 30,52 . The size distribution of materials and X-ray diffraction (XRD) pattern were evaluated with dynamic light scattering (DLS) (Malvern ZEN 3600, UK) and X-ray powder diffraction (Philips PW 1730, Netherlands) analyses, as shown in Fig.…”

Section: Resultsmentioning

confidence: 99%

Ultraviolet aging study on bitumen modified by a composite of clay and fumed silica nanoparticles

Cheraghian

Wistuba

2020

Sci Rep

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In this study, surface morphology, rheological and chemical properties were investigated of bitumen, which was modified by a composite of clay and fumed silica nanoparticles, and exposed to ultraviolet (UV) aging in laboratory. The volume fraction of the nanoparticles within the binder ranged from 1 to 3%, the temperature range considered was 30 to 70 °C. Surface morphology, rheological and chemical binder properties were analyzed using field emission scanning electron microscopy (FESEM), dynamic shear rheometer (DSR), and Fourier transform infrared (FT-IR) spectroscopy. It was found, that the bitumen modification through clay and fumed silica nanoparticles changed resulting binder properties significantly. The index of carbonyl and oxidation degree decreased, and the clay and fumed silica nanoparticles improved aging resistance to ultraviolet (UV) radiation considerably. The results indicate that the mechanical stability of the modified bitumen is very much driven by the specific concentration of clay and fumed silica nanoparticles.

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“…In addition, thickening power reduces at elevating shear rate and shear stress, which is contributed to the irreversible shear degradation of its flexible linear chains. [7][8][9][10][11] To guarantee polymer mobility-control ability in polymer flooding under high-temperature and high-salinity conditions, one way is to increase HPAM concentration. Nevertheless, cost increases steeply and there is no economic feasibility under the condition of international oil price slump [12] ; another way is to develop novel polymers with favorable temperature-resistance, salt-tolerance, and shearing resistance, which is important to promote the development of polymer flooding.…”

Section: Introductionmentioning

confidence: 99%

β‐Cyclodextrin‐functionalized copolymers based on multiple intermolecular forces for enhanced oil recovery

Ren

Ding

Luo

et al. 2020

Polymer Engineering & Sci

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As one of mature enhanced oil recovery (EOR) technologies, polymer flooding has been extensively applied in oilfield. In this study, new hydrophobically associative copolymers were synthesized by free-radical polymerization of acrylamide (AM), acrylic acid (AA), vinyl-modified β-cyclodextrins, and a water-soluble hydrophobic macromonomer (AA-APE-20). Fourier transform infrared, protonnuclear magnetic resonance, and scanning electron microscopy verified the structure of hydrophobically associative polymers (HDAPAMs). Compared with partially hydrolyzed polyacrylamide (HPAM), multiple intermolecular forces including chelation between ethoxyl (EO) group and Ca 2+ /Mg 2+ , electrostatic bridges between EO groups and carboxyl groups (COO −), hydrogen bonding between EO groups and AM groups (CONH 2), hydrophobic association among nonyl phenol groups, and host-guest inclusion interaction endowed HDAPAMs favorable temperature-resistance, salt-resistance, and displacement efficiency. It was found that HDAPAMs showed evident temperature-response, salt thickening effect, favorable thixotropy, and viscoelasticity. Compared with HPAM, the core flooding experiments demonstrated that HDAPAMs could further enhance 6.97% to 8.43% oil recovery, even after HPAM flooding used. All the results revealed the EOR potential in HDAPAMs flooding.

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Synthesis and properties of polyacrylamide by nanoparticles, effect nanoclay on stability polyacrylamide solution

Cited by 40 publications

References 17 publications

Influence of the Ce4+/Ce3+ Redox-Couple on the Cyclic Regeneration for Adsorptive and Catalytic Performance of NiO-PdO/CeO2±δ Nanoparticles for n-C7 Asphaltene Steam Gasification

Influence of the Ce4+/Ce3+ Redox-Couple on the Cyclic Regeneration for Adsorptive and Catalytic Performance of NiO-PdO/CeO2±δ Nanoparticles for n-C7 Asphaltene Steam Gasification

Ultraviolet aging study on bitumen modified by a composite of clay and fumed silica nanoparticles

β‐Cyclodextrin‐functionalized copolymers based on multiple intermolecular forces for enhanced oil recovery

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