Experimental Investigation of Dynamic Adsorption–Desorption of New Nonionic Surfactant on Carbonate Rock: Application to Enhanced Oil Recovery

2017 ◽  
Vol 139 (4) ◽  
Author(s):  
Ali Barati-Harooni ◽  
Adel Najafi-Marghmaleki ◽  
Seyed Moein Hosseini ◽  
Siyamak Moradi
Keyword(s):  
Nonionic Surfactant ◽  
Oil Recovery ◽  
Surfactant Concentration ◽  
Water Injection ◽  
Second Order ◽  
Dynamic Adsorption ◽  
Desorption Process ◽  
Adsorption And Desorption ◽  
Short Period ◽  
Pseudo Second Order

Surfactants have the potential to reduce the interfacial tension between oil and water and mobilize the residual oil. An important process which makes the surfactant injection to be less effective is loss of surfactant to porous medium during surfactant flooding. This study highlights the results of a laboratory study on dynamic adsorption and desorption of Trigoonella foenum-graceum (TFG) as a new nonionic surfactant. The experiments were carried out at confining pressure of 3000 psi and temperature of 50 °C. Surfactant solutions were continuously injected into the core plug at an injection rate of 0.5 mL/min until the effluent concentration was the same as initial surfactant concentration. The surfactant injection was followed by distilled water injection until the effluent surfactant concentration was reduced to zero. The effluent concentrations of surfactant were measured by conductivity technique. Results showed that the adsorption of surfactant is characterized by a short period of rapid adsorption, followed by a long period of slower adsorption, and also, desorption process is characterized by a short, rapid desorption period followed by a longer, slow desorption period. The experimental adsorption and desorption data were modeled by four well-known models (pseudo-first-order, pseudo-second-order, intraparticle diffusion, and Elovich models). The correlation coefficient of models revealed that the pseudo-second-order model predicted the experimental data with an acceptable accuracy.

scholarly journals Investigation of competitive adsorption and desorption of heavy metals from aqueous solution using raw rock: Characterization kinetic, isotherm, and thermodynamic

2021 ◽  
Vol 348 ◽  
pp. 01016
Author(s):  
Rajaa Bassam ◽  
Marouane El Alouani ◽  
Nabila Jarmouni ◽  
Jabrane Maissara ◽  
Mohammed El Mahi Chbihi ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Adsorption Process ◽  
Freundlich Isotherm ◽  
Langmuir Model ◽  
Second Order ◽  
Isotherm Models ◽  
Desorption Process ◽  
Pseudo Second Order ◽  
Rock Characterization ◽  
Metals Adsorption

Heavy metals are the most dangerous inorganic pollutants Due to their bioaccumulation and their nonbiodegradability, for this, several studies have focused on the recovery of these metals from water using different techniques. In this context, our study consists of evaluating an efficient and eco-friendly pathway of competitive recovery of heavy metals (Cd, Cr and As) from aqueous solutions by adsorption using raw rock. This adsorbent was characterized before and after the adsorption process by several techniques. The multi-metals adsorption process in the batch mode was undertaken to evaluate the effect of adsorbent mass, contact time, pH, Temperature, and initial heavy metals concentration. The kinetic data were analyzed using the pseudo-first-order, pseudo-second-order and intra-particle diffusion kinetic models. According to the modeling of the experimental results, the adsorption kinetics of heavy metals were adapted to the pseudo-second-order model. The adsorption isotherms were evaluated by the Langmuir and Freundlich isotherm models. The experimental isotherm data of heavy metals were better fitted with the Langmuir model rather than Freundlich isotherm models. The maximum experimental adsorption capacities (Qmax) predicted by the Langmuir model are 15.23 mg/g for Cd (II), 17.54 mg/g for Cr (VI) and 16.36 mg/g for As (III). The values of thermodynamic parameters revealed that the heavy metals adsorption was exothermic, favorable, and spontaneous in nature. The desorption process of heavy metals showed that this raw rock had excellent recycling capacity. Based on the results, these untreated clays can be used as inexpensive and environmentally friendly adsorbents to treat water contaminated by heavy metals.

scholarly journals Evaluation of multi-walled carbon nanotubes performance in adsorption and desorption of hexavalent chromium

2012 ◽  
Vol 18 (4-1) ◽  
pp. 509-523 ◽  
Author(s):  
Mina Gholipour ◽  
Hassan Hashemipour
Keyword(s):  
Carbon Nanotubes ◽  
Hexavalent Chromium ◽  
Contact Time ◽  
Second Order ◽  
Desorption Process ◽  
Kinetics Models ◽  
Initial Ph ◽  
Multi Walled Carbon Nanotubes ◽  
Pseudo Second Order ◽  
Walled Carbon Nanotubes

In this study, the removal of hexavalent chromium from aqueous solutions using multi-walled carbon nanotubes (MWCNTs) has been investigated as a function of adsorbent dosage, initial Cr(VI) concentration, initial pH, contact time and temperature. Low pH, low initial concentrations of Cr(VI), increasing contact time and high temperature were found as optimal conditions. A comparison of kinetics models applied to the adsorption of Cr(VI) ions on the MWCNTs was evaluated for the pseudo first-order, the pseudo second-order, and Elovich kinetics models, respectively. Pseudo second-order kinetics model was found to correlate the experimental data well. Equilibrium isotherms were measured experimentally and results show that data were fitted well by the BET model. Thermodynamic parameters were estimated and results suggest that the adsorption process is spontaneous, physical and endothermic. The reversibility of Cr(VI) adsorption onto MWCNTs by desorption process and the effect of operating factors such as regeneration solution characteristics, contact time and temperature on this process was investigated. Results show that MWCNTs are effective Cr(VI) adsorbents and can be reused through many cycles of regeneration without any high decreasing in their performance.

scholarly journals Assessment of Surfactant Flooding With Variations of Slug Injection Strategies in Waterflooded Reservoir

2017 ◽  
Vol 3 (3) ◽  
pp. 1
Author(s):  
Anan Tantianon ◽  
Falan Srisuriyachai
Keyword(s):  
Oil Recovery ◽  
Surfactant Concentration ◽  
Water Saturation ◽  
High Water ◽  
Late Time ◽  
Surfactant Flooding ◽  
Desorption Process ◽  
Surface Equilibrium ◽  
Selection Of ◽  
Injection Strategies

Injection of surfactant into waterflooded reservoir which has considerably high water saturation may cause a reduction in surfactant efficiency by means of surfactant dilution and adsorption. Therefore, to maintain expected lowest interfacial tension (IFT) condition, large amount of surfactant, which leads to higher cost, is inevitable. Several studies have observed that reduction in surfactant concentration slug at the late time can cause a shift in surface equilibrium, resulting in desorption of retained active surfactant agents and therefore, it is possible to obtain benefit from this phenomenon to achieve longer period of the lowest IFT condition while maintaining the amount of surfactant used. Hence, this study aims to evaluate effects of two-slug surfactant flooding compared to single-slug while maintaining amount of surfactant used constant in waterflooded reservoir. The performance is evaluated based on additional oil recovery using STAR® reservoir simulation program. Simulated results indicated that two-slug surfactant injection yields better oil recovery than conventional single-slug surfactant flooding due to benefit of sacrificial adsorption and desorption process of active surfactant. Selecting type of two-slug surfactant flooding strategy would depend on surfactant concentration of single-slug which is chosen for modification; whereas, the selection of magnitude of concentration contrast between two slugs would depend on placement of surfactant mass ratio.

The adsorption, kinetics, and interaction mechanisms of various types of estrogen on electrospun polymeric nanofiber membranes

2021 ◽  
Author(s):  
Muhammad Yasir ◽  
Tomas Sopik ◽  
Lenka Lovecka ◽  
Dusan Kimmer ◽  
Vladimir Sedlarik
Keyword(s):  
Adsorption Kinetics ◽  
High Efficiency ◽  
Average Diameter ◽  
Second Order ◽  
Desorption Process ◽  
First Order ◽  
Pseudo Second Order ◽  
17Β Estradiol ◽  
Pseudo First Order ◽  
Adsorption Desorption

Abstract This study focuses on characterizing the adsorption kinetics of sex hormones (estrone, 17β-estradiol, 17α-ethinylestradiol, and estriol) on electrospun nanofibrous polymeric nanostructures based on cellulose acetate, polyamide, polyethersulfone, polyurethane, and polyacrylonitrile. The materials’ structure possessed fibers of average diameter in the range 174-330 nm, while its specific surface area equaled 10.2 to 20.9 m2/g. The adsorption-desorption process was investigated in four cycles to determine the reusability of the sorption systems. A one-step high-performance liquid chromatography technique was developed to detect concurrently each hormone present in the solution. Experimental data was applied to gauge adsorption kinetics with the aid of pseudo-first-order, pseudo-second-order, and intraparticle diffusion models; findings showed that estrone, estradiol, and ethinylestradiol followed pseudo-second-order kinetics, while estriol followed pseudo-first-order kinetics. It was observed that polyurethane had maximum adsorption capacities of 0.801, 0.590, 0.736, and 0.382 mg/g for estrone, 17β-estradiol, 17α-ethinylestradiol, and estriol, respectively. The results revealed that polyurethane had the highest percentage efficiency of estrogens removal at ~58.9% and lowest for polyacrylonitrile at ~35.1%. Consecutive adsorption-desorption cycles demonstrated that polyurethane maintained high efficiency, even after being used four times compared with the other polymers. The findings indicate the studied nanostructures have the potential to be effective sorbents for eradicating these estrogens concurrently from the environment.

scholarly journals Adsorption and Desorption Characteristics of Cadmium on Different Contaminated Paddy Soil Types: Kinetics, Isotherms, and the Effects of Soil Properties

2021 ◽  
Vol 13 (13) ◽  
pp. 7052
Author(s):  
Weisheng Lu ◽  
Ying Liu ◽  
Huike Ye ◽  
Dasong Lin ◽  
Guijie Li ◽  
...  
Keyword(s):  
Paddy Soil ◽  
Thermal Power ◽  
Physicochemical Characteristics ◽  
Soil Samples ◽  
Second Order ◽  
Polluted Soils ◽  
Adsorption And Desorption ◽  
Plant Soil ◽  
Pseudo Second Order ◽  
Contaminated Paddy Soil

The adsorption and desorption characteristics of cadmium (Cd) in uncontaminated soils have been investigated in numerous studies. However, similar studies on Cd-polluted soils from different sources, which exhibit complex physicochemical characteristics and internal interactions between Cd and the soil particles, are scarce. Therefore, in order to elucidate the adsorption and desorption characteristics of Cd in Cd polluted soils, six representative Cd-contaminated paddy soil samples were collected from farmlands in the vicinity of a steel plant (Soil 1), a smelter (Soil 2), a thermal power plant (Soil 3), two mining areas (Soil 4, the Dabaoshan mine, Shaoguan; Soil 5, a lead-zinc mine located at Lechang), and a paddy field irrigated with sewage at Zhongshan (Soil 6) in Guangdong Province, China. The analysis of the six soil samples showed that Cd adsorption fitted well to pseudo-second order as well as pseudo-first order kinetics; however, the pseudo-second order equation showed a better fit (R2 = 0.860–0.962), while Elovich and intraparticle kinetic models fitted the adsorption kinetics poorly. Further, the adsorption isotherms fitted well to both the Langmuir and Freundlich models, with the Freundlich model showing a better fit (R2 = 0.96–0.98). The following order was observed for the Cd(II) adsorption amount and rate: S5 > S6 > S1 > S3 > S2 > S4; meanwhile, the desorption amount and rate followed the opposite trend. Furthermore, the pH and soil organic matter were identified as the soil characteristics with the most significant impact on the adsorption and desorption behaviors of Cd(II) in the Cd-polluted soils.

scholarly journals Sorption of oils by a commercial non-woven polypropylene sorbent

2021 ◽  
Vol 10 (14) ◽  
pp. e554101422671
Author(s):  
Marcelo Zaro ◽  
Wendel Paulo Silvestre ◽  
Jéssica Grapilha Fedrigo ◽  
Mara Zeni ◽  
Camila Baldasso
Keyword(s):  
Sorption Capacity ◽  
Adsorption Isotherms ◽  
Oil Recovery ◽  
Chemical Properties ◽  
Physicochemical Characteristics ◽  
Second Order ◽  
Fiber Morphology ◽  
Lubricant Oil ◽  
Pseudo Second Order

Non-woven polypropylene (PP) sorbents are materials that can be used in oil recovery following spills, which are interesting alternatives to remediate contaminated areas. This work aimed to characterize a non-woven sorbent made of PP. The physicochemical characteristics of the material, sorption capacity, kinetics, and adsorption isotherms were evaluated. The physicochemical study included the determination of thickness, density, thermal and chemical properties of the sorbent, and fiber morphology. Sorption tests were performed according to the standard method ASTM 726-12. The kinetic models of pseudo-first and pseudo-second order were tested. The fit of the experimental data to the adsorption isotherms of Langmuir, Freundlich, and Temkin was also carried out. The sorbates used in the tests were diesel, petroleum, and lubricant oil. The sorption capacity of the PP nonwoven blanket relative to diesel, petroleum, and lubricant oil in long-term tests was 5.3, 12.3, and 18.7 g∙g-¹, with increasing values when sorbates were more viscous. The results of the short and long-term tests did not show a statistical difference in the sorption capacity of the blanket. The kinetic study showed that the sorption of the three sorbates followed pseudo-second-order kinetics. The diesel oil presented a better fit to the Langmuir isotherm (R² = 0.998), whereas the petroleum presented an excellent fit to all three isotherms (R² = 0.996-0.999). Regarding sorbent reusability, the sorption capacity stabilized after the second cycle, and the samples whose sorbate removal was carried out by centrifugation have presented and maintained the highest sorption capacities.

scholarly journals Effects of Polymer Adsorption and Desorption on Polymer Flooding in Waterflooded Reservoir

2017 ◽  
Vol 3 (3) ◽  
pp. 1
Author(s):  
Sukruthai Sapniwat ◽  
Falan Srisuriyachai
Keyword(s):  
Oil Recovery ◽  
Polymer Concentration ◽  
Polymer Adsorption ◽  
Injection Rate ◽  
Polymer Flooding ◽  
Absolute Permeability ◽  
Rock Surface ◽  
Sweep Efficiency ◽  
Desorption Process ◽  
Adsorption And Desorption

Polymer Flooding is one of the most well-known methods in Enhanced Oil Recovery (EOR) technology, resulting in favorable conditions for displacement mechanism to lower residual oil in the reservoir. Polymers can lower mobility ratio by increasing the viscosity of injected water, hereby increasing volumetric sweep efficiency. Moreover, polymer adsorption onto the rock surface can help decrease reservoir permeability contrast. Due to absolute permeability reduction, the effective permeability to water is also reduced. Once the polymer is adsorbed onto the rock surface, polymer molecules can be desorbed with a chaser. This study is performed to further evaluate the effects of the adsorption and desorption process of polymer solutions to yield benefits on the oil recovery mechanism. A reservoir model is constructed by the reservoir simulation program called STAR® from Computer Modeling Group (CMG). Various polymer concentrations, starting times of polymer flooding process and polymer injection rates were evaluated with selected degrees of polymer desorption including 0, 50 and 100%. According to the results, polymer desorption lowers polymer consumption, especially at low concentrations. Polymer desorption causes polymer re-employment that is previously adsorbed onto rock surface, resulting in an increase of sweep efficiency in the further period of polymer flooding process. Furthermore, the results show that waterflooding followed by earlier polymer flooding can increase the oil recovery factor whereas the higher injection rate also enhances the recovery. Polymer concentration has relationship with polymer consumption due to the two main benefits described above. Therefore, polymer slug size should be optimized based on polymer concentration.

Static and Dynamic Adsorption of Anionic and Nonionic Surfactants

1977 ◽  
Vol 17 (05) ◽  
pp. 337-344 ◽  
Author(s):  
F.J. Trogus ◽  
T. Sophany ◽  
R.S. Schechter ◽  
W.H. Wade
Keyword(s):  
Hydrogen Bonding ◽  
Oil Recovery ◽  
Nonionic Surfactants ◽  
Anionic Surfactants ◽  
Breakthrough Curves ◽  
Dynamic Adsorption ◽  
Surfactant Adsorption ◽  
Chemical Flooding ◽  
Divalent Ions ◽  
Adsorption And Desorption

Abstract The adsorption of commercial polyoxyethylene nonyl phenols and alkyl benzene sulfonates was studied by measuring the surfactant breakthrough from Berea cores. A rate model that reduces to a Langmuir-type isotherm at equilibrium represented these dynamic results and predicted successfully the equilibrium isotherms determined by static experiments.The ratios of both adsorption and desorption were determined and were observed to increase with the number of ethylene oxide groups. Adsorption of the nonionic surfactant appeared to be by hydrogen bonding and the amount adsorbed per unit of area was the same on a number of metal oxide substrates.Negligible adsorption was observed for sulfonates with an alkyl chain length of 9 or less. Introduction Surfactant adsorption is one of the important features governing the economic viability of chemical flooding processes. However, the adsorption on mineral oxide surfaces is only one of several possible mechanisms leading to surfactant losses.Other mechanisms include precipitation of surfactant in the presence of divalent ions, diffusion of surfactant into dead-end pores, and surfactant partitioning into the oil phase. It is necessary partitioning into the oil phase. It is necessary to minimize the losses by all mechanisms. The work reported here addresses the problem of surfactant adsorption; other mechanisms are not considered.There are a number of approaches that have the potential for minimizing adsorption. The most potential for minimizing adsorption. The most desirable surfactant is one that does not adsorb at all; however, such surfactants may not be effective oil-recovery agents. Sacrificial agents that adsorb in place of the surfactant can be used in a preflush or as a competitive additive to the surfactant slug, but effective agents have not yet been identified.Two aspects of the adsorption process are of interest the rate and the amount adsorbed. Both are examined here. The measurements include the dynamic adsorption of both anionic and nonionic surfactants in Berea cores that are initially filled with brine. The breakthrough curves are represented successfully using a model that accounts for the surface coverage. The rate expression reduces to a Langmuir-type isotherm. The shape of this curve has been verified by conducting static experiments.The study included both nonionic and anionic surfactants. These were not pure surfactants but, in general, they are well characterized. The anionic surfactants were studied because their behavior should-be representative of more complex mixtures such as the petroleum sulfonates that have been regarded as prime candidates for oil-recovery agents. These sulfonates are sensitive to divalent ions and many chemical slugs include quantities of nonionic surfactants to alleviate this difficulty to some extent. Therefore, this study included a systematic study of a particular class of nonionic surfactants. This study is the first to report rates of adsorption and desorption. From this information, the nature of the adsorption can be better understood. THEORY Michaels and Morelos have established that the adsorption of polyanions on kaolin occurs by hydrogen bonding. The specific sites at which this adsorption takes place were not defined. For the adsorption of surfactants, this mechanism can be represented as follows: ....................... (1) SPEJ p. 337

scholarly journals Functionalization of Zeolite NaP1 for Simultaneous Acid Red 18 and Cu(II) Removal

Materials ◽  
2021 ◽  
Vol 14 (24) ◽  
pp. 7817
Author(s):  
Tomasz Bień ◽  
Dorota Kołodyńska ◽  
Wojciech Franus
Keyword(s):  
Nitrogen Adsorption ◽  
Second Order ◽  
Sorption Properties ◽  
Isotherm Models ◽  
Hexadecyltrimethylammonium Bromide ◽  
Simultaneous Removal ◽  
Phase Contact Time ◽  
Good Efficiency ◽  
Desorption Process ◽  
Pseudo Second Order

The efficiency of azo dye Acid Red 18 (AR18) and Cu(II) ions simultaneous removal from an aqueous solution on NaP1CS and NaP1H was investigated, taking into account the effect of the phase contact time, pH, initial concentration, temperature, and interfering ions presence. Zeolite denoted as NaP1CS was modified by chitosan (CS) and zeolite denoted as NaP1H was modified by hexadecyltrimethylammonium bromide (HDTMA). In order to characterize sorption properties of NaP1CS, the obtained sorbent was characterized using Fourier transform infrared spectroscopy (FTIR) and nitrogen adsorption/desorption (ASAP). The kinetic parameters were determined by means of the pseudo first order (PFO), pseudo second order (PSO), and intraparticle diffusion (IPD) kinetic models. To present the adsorption data, three different isotherm models (Langmuir, Freundlich and Dubinin-Radushkevich) were used. The desorption process was also examined. It was found that for sorbent NaP1CS the pseudo second order (PSO) kinetic model and the Langmuir isotherm fitted best the experimental data. Moreover, it was noted that the acidic pH is appropriate to achieve the best sorption properties of NaP1CS for Cu(II) and NaP1H for AR18 and Cu(II). The thermodynamic parameters indicate an endothermic process. The most effective solution for the desorption process was found to be 1 M HCl. The results indicate that simultaneous removal of dye AR18 and Cu(II) on modified zeolite NaP1CS or NaP1H is possible and proceeds with a very good efficiency. The obtained zeolites could effectively adsorb AR18 an Cu(II) simultaneously, but their adsorption abilities were rather different.

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