Adsorption Characteristics of Polymer Solutions on Media Surfaces and Their Main Influencing Factors

Zhu, Shijie; Ye, Zhongbin; Liu, Zhezhi; Chen, Zhonghua; Li, Jun; Xiang, Zuping

doi:10.3390/polym13111774

Cited by 22 publications

(15 citation statements)

References 43 publications

(45 reference statements)

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“…This shows that the pseudo-second order model best describes the adsorption kinetics of the process, indicating that the adsorption of polyacrylamide onto carbonate particle surface is largely dependent on the adsorbate concentration. This is in line with the findings from Zhu et al [ 16 ], whereby they found that the adsorption of polyacrylamide onto a quartz sand also displayed pseudo-second order kinetics, which suggested that the adsorption process is dependent on polymer concentration, and interaction between polyacrylamide and quartz sand is mainly through electrostatic and hydrogen bonding forces. Similarly, in the case of calcium carbonate, as the CO − group of HPAM is responsible for electrostatic attraction with the surface Ca 2+ ions of CaCO 3 surface [ 16 , 30 , 31 ].…”

Section: Resultssupporting

confidence: 92%

“…This is in line with the findings from Zhu et al [ 16 ], whereby they found that the adsorption of polyacrylamide onto a quartz sand also displayed pseudo-second order kinetics, which suggested that the adsorption process is dependent on polymer concentration, and interaction between polyacrylamide and quartz sand is mainly through electrostatic and hydrogen bonding forces. Similarly, in the case of calcium carbonate, as the CO − group of HPAM is responsible for electrostatic attraction with the surface Ca 2+ ions of CaCO 3 surface [ 16 , 30 , 31 ]. As for the intraparticle diffusion model in Figure 6 , the plot shows a good degree of fitting, but it does not pass through the origin of the plot, indicating that intraparticle diffusion is not the rate-limiting step in the adsorption process.…”

Section: Resultssupporting

confidence: 92%

“…The datapoints were then fitted into four different adsorption kinetic models. The first model is the pseudo-first order model [ 16 ]:

where Q e is the equilibrium PAM adsorption capacity per unit surface area of carbonate (mg/m 2 ), Q t is the PAM adsorption capacity per unit surface area of carbonate (mg/m 2 ) at given time t , and k 1 is the pseudo-first order rate constant. This model assumes that the adsorption rate is directly proportional to the adsorbate concentration, is limited by the mass transfer resistance in the particle.…”

Section: Methodsmentioning

confidence: 99%

“…Another interesting isothermal adsorption model to discuss is the Temkin isotherm, which is used to describe adsorption processes driven by strong intermolecular interactions, such as electrostatic interactions or ion exchange between adsorbate and adsorbent with heterogeneous surfaces [ 16 ]. We considered looking into this adsorption model as we expect the presence of an electrostatic attraction between the HPAM and CaCO 3 which are oppositely charged.…”

Section: Methodsmentioning

confidence: 99%

“…Essentially, highly branched polymers produce more open flocs in the system, giving more opportunities for bridging mechanisms which lead to higher adsorption rates. In terms of study of PAM adsorption kinetics and isotherm, Zhu et al [ 16 ] conducted a study on the adsorption of hydrolysed PAM (HPAM) onto quartz sand surface. Their results indicate that HPAM adsorption fits a Langmuir isotherm, which agrees with several published papers [ 1 , 17 , 18 , 19 ].…”

Section: Introductionmentioning

confidence: 99%

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Adsorption of Hydrolysed Polyacrylamide onto Calcium Carbonate

et al. 2022

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Carbonate rock strengthening using chemical techniques is a strategy to prevent excessive fines migration during oil and gas production. We provide herein a study of the adsorption of three types of hydrolysed polyacrylamide (HPAM) of different molecular weight (F3330S, 11–13 MDa; F3530 S, 15–17 MDa; F3630S, 18–20 MDa) onto calcium carbonate (CaCO3) particles via spectrophotometry using a Shimadzu UV-2600 spectrometer. The results are compared to different adsorption isotherms and kinetic models. The Langmuir isotherm shows the highest correlation coefficient (R2 > 0.97) with equilibrium parameters (RL) ranging between 0 and 1 for all three HPAMs, suggesting a favorable monolayer adsorption of HPAM onto CaCO3. The adsorption follows pseudo-second order kinetics, indicating that the interaction of HPAM with CaCO3 is largely dependent on the adsorbate concentration. An adsorption plot reveals that the amount of HPAM adsorbed onto CaCO3 at equilibrium increases with higher polymer molecular weight; the equilibrium adsorbed values for F3330S, F3530S and F3630S are approximately 0.24 mg/m2, 0.31 mg/m2, and 0.43 mg/m2, respectively. Zeta potential analysis shows that CaCO3 has a zeta potential of +12.32 mV, which transitions into negative values upon introducing HPAM. The point of zero charge (PZC) is observed at HPAM dosage between 40 to 50 ppm, in which the pH here lies between 9–10.

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Section: Resultssupporting

confidence: 92%

Section: Resultssupporting

confidence: 92%

“…The datapoints were then fitted into four different adsorption kinetic models. The first model is the pseudo-first order model [ 16 ]:

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Adsorption of Hydrolysed Polyacrylamide onto Calcium Carbonate

et al. 2022

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Effects of residual resistance factor in the mobility control of the polymer flooding

Cao

Zhu

Zheng

et al. 2022

J of Applied Polymer Sci

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To broaden the application of the polymer flooding in complex reservoirs, the residual resistance factor (RRF) is sought to make up for the limitations of high‐viscosity polymer flooding. First, the polymer solution rheology, adsorption and retention behaviors were mathematically characterized, and subsequently substituted into the equation of motion of the aqueous phase to build a mathematical model of the polymer flooding percolation. Second, based on the built numerical model, the formation process of seepage resistance and pressure propagation characteristics of polymers with a high RRF in the porous media were investigated. Lastly, the effects arising from viscosity and RRF on the flow control of the polymer flooding were explored by comparing the injection capacity, crude oil utilization and profile control capacity of different permeable formations at different development stages. As revealed by the results, the RRF was found to be more favorable than the “viscosity” parameter in improving the injection capacity at the polymer flooding stage. Moreover, it was found to slow down the water‐cut increase at the subsequent water flooding stage and reduce the difference between the oil recovery rate and injection pressure at different stages. Furthermore, the viscosity was primarily adopted to facilitate oil recovery of medium and high‐permeability formations by increasing the oil replacement efficiency, while the RRF was primarily dependent on the regulation of interlayer water absorption differences, thus mobilizing the remaining oil under the low‐permeability formations.

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