Genetic Algorithm Development for Prediction of Modified Langmuir Isotherm Parameters of Asphaltene Adsorption onto Metal Surfaces: Using Novel Quartz Crystal Nanobalance

Mohammadi, Majid; Sedighi, Mehdi; Kiasari, Hani Hashemi; Hosseini, Seyed MortezaTohidi

doi:10.1080/01932691.2014.903806

Cited by 25 publications

(7 citation statements)

References 52 publications

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“…The model parameters summarized in Table were obtained by minimizing the average square deviations between the experimental data and the model. The coefficient of determination, R 2 , suggests that the data are better fit by Langmuir model, which entails monolayer adsorption. − It should be noted that values of the coefficient of determination, R 2 , are very low for the Freundlich isotherm fitting, as opposed to Langmuir fit, which was always high, >0.96. Accordingly, Langmuir isotherm was assumed.…”

Section: Results and Discussionmentioning

confidence: 99%

Asphaltenes Adsorption onto Metal Oxide Nanoparticles: A Critical Evaluation of Measurement Techniques

2018

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The adsorption of asphaltenes onto nanoparticles (NPs) has received a lot of attention in recent years. However, the effect of the measurement technique on the adsorption isotherms has never been addressed. In this paper, the adsorption of n-heptane-precipitated asphaltenes, C7-asphaltenes, from toluene model solutions onto three metal oxide NPs, namely Fe2O3, Fe3O4, and Al2O3, was studied. Asphaltenes uptake calculated from UV–vis spectroscopy at three different wavelengths were compared with thermogravimetric analysis (TGA) results. Although the adsorption trends followed Langmuir isotherms, instrument as well as wavelength-dependent coefficients were obtained. We believe TGA results are more reliable, provided complete oxidation and account of mass loss due to NPs is attained. UV–vis measurements may be impacted by the chemical structure of the asphaltenes sub fractions as well as their state of association. Al2O3 showed the highest adsorption capacity of 385 ± 5 mg/g, followed by Fe3O4 and Fe2O3. However, based on mg/m2, Fe2O3 displayed the highest adsorption capacity. TGA analysis revealed that the NPs promoted the oxidation of adsorbed asphaltenes in a reverse order to their adsorption capacity, q max (mg/g) (Al2O3 > Fe2O3 ≈ Fe3O4). This trend is in line with our previous observation of mass-dependent thermo-oxidative profile and surface exposure role, rather than a catalyst role, of the NPs. Lastly, the C7-asphaltenes from this study were characterized, and their structural parameters were compared to 45 asphaltenes from the literature. The size and structural parameters of the asphaltenes clusters are in good agreement with the literature values.

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Section: Results and Discussionmentioning

confidence: 99%

Asphaltenes Adsorption onto Metal Oxide Nanoparticles: A Critical Evaluation of Measurement Techniques

2018

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“…A reference solution was prepared containing asphaltene in toluene at a concentration of 1500 mg/L. The reference solution was diluted with toluene to make other solutions at concentrations of 100 to 1000 mg/L …”

Section: Methodsmentioning

confidence: 99%

“…Plugging wellbore, contamination of transport tubes, production of a stabilized oil–water emulsion, and deactivation of the catalyst are the major effects that cause asphaltene damage. , In the structure of asphaltenes, there are several functional groups, such as carboxyl, pyridine, thiophene, sulfide, and pyrrole. These types of functional groups cause the adsorption of asphaltenes on diverse surfaces . Adsorption of asphaltenes on different dry mineral surfaces such as metals and metal oxide are mentioned in the literary works. − According to these reports, the adsorption behavior of the monolayer − and multilayer − was revealed to rely on the solvent and asphaltenes source.…”

Section: Introductionmentioning

confidence: 99%

“…These types of functional groups cause the adsorption of asphaltenes on diverse surfaces . Adsorption of asphaltenes on different dry mineral surfaces such as metals and metal oxide are mentioned in the literary works. − According to these reports, the adsorption behavior of the monolayer − and multilayer − was revealed to rely on the solvent and asphaltenes source. One of the new efficient and environmentally compatible methods for adsorbing asphaltenes involves the use of nanoparticles.…”

Section: Introductionmentioning

confidence: 99%

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Biobased Cadaverine as a Green Template in the Synthesis of NiO/ZSM-5 Nanocomposites for Removal of Petroleum Asphaltenes: Financial Analysis, Isotherms, and Kinetics Study

et al. 2018

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Asphaltene deposition is crucial for the production and refining of crude oil. Numerous studies have been carried out to prevent asphaltene deposition using inhibitors which not only show great effectiveness in suppressing asphaltene precipitation but are also environmentally friendly. In accordance with this objective, the effect of NiO/ZSM-5 nanocomposites as an innovative green adsorbent was experimentally tested to eliminate asphaltene from a model oil solution. This adsorbent is synthesized via an eco-friendly template. The morphological nanocomposite was detected using Fourier transform infrared analysis, X-ray diffraction, transmission electron microscopy, as well as Brunauer–Emmett–Teller analysis. The batch experiments were developed using central composite design (CCD), which can optimize the most important parameters to maximize the removal percentage. An R 2 value of 0.95 was obtained from the regression analysis of the experiments, which showed close accordance between the experimental and the model data. On the basis of RSM, the removal efficiency of asphaltene was 90.35% with an predicted optimum of D/C = 0.072 [(g)adsorbent/(mg/L)initial], pH = 4.80, and temperature = 298 K. Isotherms were identified and verified using the factor R L. The double exponential model was employed to evaluate the kinetics process. Additionally, the importance of asphaltene removal and financial analysis is appraised in regard to stock returns of oil and petrochemical companies after asphaltene removal.

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“…Asphaltene is definitely found in crude oil and must be eliminated during the processing stages of crude oil. Asphaltene problems can considerably decrease well profitability, resulting in problematic operational problems, reducing production and increasing the costs of oil production (Mohammadi et al 2015).…”

Section: Introductionmentioning

confidence: 99%

The Nexus between Stock Returns of Oil Companies and Oil Price Fluctuations after Heavy Oil Upgrading: Toward Theoretical Progress

et al. 2019

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This study attempts to discover the nexus between crude oil price fluctuation after heavy oil upgrading and stock returns of petroleum companies in the U.S. Stock Exchange for the years 2008 to 2018. One of the methods of upgrading heavy crude oil is to extract asphaltene from crude oil. Considering the Asphaltene Removal (AR) as a factor in the nexus between oil price and the stock market is an innovation in the literature of energy finance. Asphaltenes cause many problems in the petroleum industry, which increases the cost of oil production and reduces the financial efficiency of oil companies. The AR is certainly one of the significant matters of the oil industry and can affect the price of oil. Therefore, changes in the price of oil can influence the price of oil company stocks. Hence, changes in stock prices will certainly affect the stock returns of oil companies. In an effort to solve this puzzle, the four financial models were employed to explore the nexus between oil price fluctuations and stock returns. The analysis of the results demonstrated that the oil price fluctuations caused by the removal of asphaltenes influence the stock returns of petroleum companies. Eventually, the theoretical hypothesis was confirmed by considering the USA as a case study. The outcomes of this investigation are a theoretical progression in areas related to the petroleum industry and the stock market that could lead to the adoption of new investment policies in the petroleum industry including investing in new procedures to manage and decrease the costs and time of the AR process, which would result in the advancement of petroleum companies. In fact, we have introduced a modern investment strategy in the oil industry aimed at reducing oil production costs, improving financial statements and increasing the stock returns of petroleum companies. Eventually, we will present new investment policies in the oil industry that can lead to economic growth and development of financial markets especially stock market, derivatives market, futures exchange, commodities exchange, as well as bond market.

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Genetic Algorithm Development for Prediction of Modified Langmuir Isotherm Parameters of Asphaltene Adsorption onto Metal Surfaces: Using Novel Quartz Crystal Nanobalance

Cited by 25 publications

References 52 publications

Asphaltenes Adsorption onto Metal Oxide Nanoparticles: A Critical Evaluation of Measurement Techniques

Asphaltenes Adsorption onto Metal Oxide Nanoparticles: A Critical Evaluation of Measurement Techniques

Biobased Cadaverine as a Green Template in the Synthesis of NiO/ZSM-5 Nanocomposites for Removal of Petroleum Asphaltenes: Financial Analysis, Isotherms, and Kinetics Study

The Nexus between Stock Returns of Oil Companies and Oil Price Fluctuations after Heavy Oil Upgrading: Toward Theoretical Progress

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