Masoud Nasiri

Semnan University · Faculty of Chemical, Petroleum and Gas Engineering

This research investigates the use of a glass micromodel to observe the effects of flooding with a microemulsion on oil recovery and wettability changes. Initially, the internal surface of the micromodel was converted to an oil wet state to better simulate reservoir conditions. Flooding with distilled water resulted in 75% oil recovery in the water...

Hydrogen is promising in decarbonizing energy systems as a low-carbon fuel. Its central role is due to the possibility of producing it using renewable energy without releasing carbon dioxide into the atmosphere. However, until now, a promising source, naturally occurring hydrogen, also known as gold hydrogen, has been largely ignored. It was hypoth...

As(III) is a dangerous species that contaminates groundwater resources and therefore water purification from this element is necessary. In this study, the removal of As(III) was investigated by the emulsion liquid membrane (ELM) technique due to the high toxicity levels of this species. The effect of various parameters such as hydrochloric acid and...

In this study, the micellar-enhanced ultrafiltration (MEUF) separation process was employed to determine the removal percentage of lead ions from aqueous solutions. The effect of diverse parameters, such as the initial concentration of lead (200-400 mg/l), operating pressure (2-4 bar) and molar concentration ratio of the surfactant SDS to the metal...

Microemulsion systems are of interest to researchers due to their low energy requirements and thermodynamic stability in a wide range of applications, including enhanced oil recovery, gas absorption, drug delivery, and chemical reaction environments. In this research, the viscosity of microemulsions was characterized and then predicted. Tween 20 an...

In this paper, the removal efficiency of Cerium (Ce(ΙΙΙ)) and lanthanum (La(ΙΙΙ)) ions from aqueous solution using Amberlite XAD-7 resin impregnated with DEHPA(XAD7-DEHPA) was studied in the batch system. The adsorbent ( XAD7–DEHPA) was characterized by SEM–EDX, FTIR and BET analysis Techniques. The response surface methodology based on the central...

This study covers the synthesis of hypercrosslinked polystyrene adsorbents based on polystyrene (P-HCP) and expanded polystyrene (EPS-HCP) with a simple one-step Friedel–Crafts reaction to remove lead. The surface areas for P-HCP and EPS-HCP were obtained as 370.79 and 689.38 m2/g, respectively. The FESEM analysis for P-HCP and EPS-HCP adsorbents d...

The goal of this paper is to investigate the ability of Amberlite XAD-7 (AXAD-7) resin impregnated with CYANEX-272 (di-2,4,4-trimethylpentyl phosphonic acid) to remove cerium (Ce(ΙΙΙ)) and lanthanum (La(ΙΙΙ)) ions from aqueous solutions in the batch scheme. The prepared adsorbent material was determined utilizing FTIR, SEM–EDX, and BET methods. The...

Dissipative particle dynamics (DPD) simulation was used to investigate the self-assembled structure of dodecyl trimethyl ammonium bromide (DTAB) and Gemini hexamethylene-1, 6-bis (dodecyl dimethyl ammonium bromide) (12-6-12) surfactants in the aqueous solution. The influence of simulation time and surfactant concentration was studied as the effecti...

In the present study, the micellar-enhanced ultrafiltration (MEUF) process was employed for the removal of Pb2+ ions from aqueous solutions using sodium dodecyl sulfate (SDS) and sodium lauroyl sarcosinate (Sarkosyl) as the anionic surfactants. The performance of Sarkosyl was compared to SDS, a frequently used surfactant in the MEUF processes, to e...

Spontaneous imbibition and core flooding investigations were carried out on limestone core plug samples using different low salinity water (LSW) and smart brines at temperatures of 110 and 50℃, respectively. To demonstrate further the potential of low salinity water injection (LSWI) as an agent for enhanced oil recovery (EOR) studies, the interfaci...

The aim of this study was to selectively separate precious metals such as gold and palladium from a binary solution using the Gemini micellar-enhanced ultrafiltration (GMEUF) process. The selectivity of this process was improved by adding the chelating agent ethylene diamine tetra-acetic acid (EDTA) to the solution. It means that one of these two m...

In this research, porous adsorbents of hypercrosslinked microporous polymer based on carbazole networks (HCP-CN) were synthesized for Pb(II) elimination from wastewaters. The results demonstrated that the extreme HCP-CN adsorbents utilization in wastewater treatment could remove more than 99.88% of Pb (II) ions. Furthermore, the two consumed adsorb...

Using nanoparticles can lead to an increase in mass transfer rate in liquid–liquid extraction systems. Increasing the concentration of nanoparticles in liquids results in the deposition of nanoparticles and thus limits its use in extraction systems. In this paper, the effect of adding a surfactant to nanoparticle in liquid-liquid extraction systems...

n this study, the adsorption of cerium and lanthanum ions from aqueous solutions was investigated using Amberlite XAD-7 resin impregnated with bis (2,4,4–trimethylpentyl) phosphinic acid (Cyanex-272) in the batch system. The characterization of provided resin was performed by SEM and FTIR analysis. The effect of important parameters such as pH, con...

The improvement of mass transfer in liquid-liquid extraction systems of pulsed packed columns has recently attracted much attention. The influence of nanoparticle and surfactant concentration on hydrodynamic characteristics and the mass transfer coefficient in the liquid phase were evaluated. The addition of nanoparticles increases the diffusion an...

In This study, an absorbent consisting of DEHPA impregnated onto Amberlite XAD-7 resin was prepared,and, used for the adsorption of Ce (ΙΙΙ) and La(ΙΙΙ) ions from aqueous solution. The absorbent ( XAD-7 + DEHPA) was charaterized by SEM and FTIR analysis Techniques. Several influential variables such as, contact time, pH, and temperature were studie...

In this study, hydrous ferric oxide (HFO) particles were used to modify polyethersulfone (PES) ultrafiltration membranes, in view of obtaining super-hydrophilic membranes. The structure and size of HFO particles and the surface properties and morphology of the synthesized membranes were characterized using Fourier-transform infrared spectroscopy (F...

In this study, the adsorption behavior of Th(IV) ions was investigated using polyaniline (PAni) nanocomposites. Nanocomposites were synthesized with two types of dopants (H3PO4 and H2SO4) and two oxidants ((NH4)2S2O8 and KIO3) in the presence of two different surfactants (sodium dodecylbenzene sulfonate (SDBS) and hydroxypropyl cellulose (HPC)). Th...

The present work evaluates and optimizes CO2 absorption in a bubble column for the Pz-H2O–CO2 system. We analyzed the impact of the different operating conditions on the hydrodynamic and mass-transfer performance. For the optimization of the process, variable conditions were used in the multivariate statistical method of response surface methodolog...

The aim of this study is to examine the effect of the addition of aluminum fumarate (AlFu) nanoparticles on the properties of polyethersulfone (PES) membranes, in which the AlFu nanoparticles were synthesized as the nanofillers with the metal-organic framework and their structure was characterized by the Fourier transform infrared spectroscopy (FTI...

The purpose of this study was to investigate the extraction of lead by emulsion liquid membrane as an effective alternative to conventional lead extraction methods. The emulsion included D-2-ethylhexyl phosphoric acid (D2EHPA) as a carrier, paraffin and kerosene composition as an organic solvent, Span 80 as an emulsifier and sulfuric acid as an int...

The present work focuses on CO2 reactive absorption using Piperazine aqueous solutions in a stirrer bubble column. A stirrer bubble column has been applied for operating conditions, including CO2 partial pressures in the range of 16.0–35.2 kPa, stirrer speed in the range of 0–300 rpm and CO2 loading in the range of 0.01–0.3 mol CO2.mol Pz⁻¹. The re...

Organic–inorganic composite ultrafiltration membrane was prepared with Polyethersulphone and nano-xerogels. On the other hand, xerogels were also prepared by a simple method and were synthesized by a sol–gel process in which tetramethyl orthosilan and tetraethyl orthosilan were used as a precursor. Besides, high-energy planetary ball mill process w...

This study dealt with the Paraquat dichloride herbicide (PQT) adsorption on xerogels. The xerogels were synthesized with tetra methoxy orthosilicate (TMOS) and tetra ethoxy orthosilicate (TEOS) as a precursor. Whereas xerogels have free silanol groups on their surface and PQT has a positive charge as an ion, xerogels have shown a high affinity for...

In this work, absorption of CO2 into nanofluid of TiO2, ZnO, and ZrO2 at Piperazine solution was investigated experimentally in a continuous stirrer bubble column. The dosage range of nanofluids was 0.01 to 0.1 wt% in the experiments. The process parameters such as nanoparticles type, solid loading, and stirrer speed were varied to the hydrodynamic...

Microemulsion flooding is one of the most effective methods of Chemical Enhanced Oil Recovery (CEOR), particularly for the production of residual oil trapped in unconventional reservoirs. A critical step for successful application of this technique is to achieve a suitable formulation. Previous studies have almost focused on the technical aspects w...

The purpose of this study was to investigate the removal of Fast Green FCF dye from aqueous solutions using Flower Gel in a batch adsorption process. The effect of different parameters such as pH, contact time, adsorbent dosage, stirrer speed and temperature were studied, and various isotherms including Langmuir, Freundlich and Tempkin were applied...

Scaling imbibition curves are of great importance in the characterization and simulation of oil production from naturally fractured reservoirs. Different parameters such as matrix porosity and permeability, oil and water viscosities, matrix dimensions, and oil/water interfacial tensions have an effective on the imbibition process. Studies on the sc...

In this study, the effect of different parameters on the fluid transport in a fractured micromodel has been investigated. All experiments in this study have been conducted in a glass micromodel. Since the state of wetting is important in the micromodel, the wetting experiments have been conducted to determine the state of wetting in the micromodel....

Counter-current spontaneous imbibition (SI), in which water and oil flow through the same face in opposite directions, is known as one of the most significant oil recovery mechanisms in naturally fractured reservoirs; however, this mechanism has not received much attention. Understanding the dynamic of water-oil displacement during counter-current...

One of the most significant problems that petroleum and gas industries tend to know much more is the behavior and the weight percent of Asphaltene precipitation in crude oils. A large number of researchers have been scrutinizing to develop new models for estimating Asphaltene precipitation. Of available approaches, scaling law which is not only rel...

The purpose of this study was to recycle reverse osmosis membranes from the environment and modify them in a continuous ultrafiltration system using NaOCl and KMnO4 as the chemical oxidants. After peeling off the reverse osmosis membranes, the structure of the modified membranes was investigated by FTIR analysis. Then the pure water flux was measur...

In the present work, absorption of carbon dioxide into Piperazine solution was investigated experimentally in a pilot scale stirrer bubble column. In the experiments, mass transfer and hydrodynamics parameters including loading, removal efficiency, absorption flux and mass transfer coefficients at various volumetric liquid and CO2 flow rate, absorb...

Produced water, which could be a complex mixture of different organic and inorganic compounds (mostly salts, minerals and oils), is a major wastewater generated during oil/gas production. due to increased oil and gas production, particularly with usability of shale oil/gas reserves, volume of this effluent is increasing around the world, and as a c...

Depleting conventional oil reservoirs, people of the world today are in need of exploiting other resources as a substitution to obviate their daily requirements for energy. One of the well-known resources being currently under exploitation is unconventional reservoir beds or so-called heavy oils. Unlike conventional ones, heavy oils unfortunately c...

In this work, solubility and chemical absorption rate of carbon dioxide into aqueous solutions of diethanolamine (DEA) were studied in a stirred bubble column. In the experiments the effects of stirrer speed, amine concentration, CO2 partial pressure and CO2 loading on absorption rate and solubility were investigated. The experimental conditions ar...

The purpose of this study was to investigate the adsorption of uranium (VI) ions on the polypyrrole adsorbent. Polypyrrole was synthesized by a chemical method using polyethylene glycol, sodium dodecylbenzenesulfonate, and cetyltrimethylammonium bromide as the surfactant and iron (III) chloride as an oxidant in the aqueous solution. The effect of v...

Injection of gel polymers is one of the methods used to prevent unwanted water production in hydrocarbon reservoirs. Gel polymers have different types but the stable form of them is more pleasant. In this experimental study, a nanocomposite gel polymer is prepared by xanthan (as polymer), chromium acetate (III) (as cross-linker), montmorillonite na...

Spontaneous imbibition is known as one of the main recovery driving forces in naturally fractured reservoirs. In this study, a numerical model to investigate the impact of carbonated water on oil recovery during spontaneous countercurrent imbibition is presented. This model includes the dynamic modification of oil viscosity, oil swelling, wettabili...

The positive feedback from previous studies has confirmed the high performance of microemulsion flooding. However, there are few researches assessing this efficient method in carbonates reservoirs, particularly at high temperature. This paper attempts to fill the gap. Furthermore, biodiesel is introduced and evaluated as a new hydrocarbon source of...

Carbon dioxide (CO2) storage in aquifers or injection to petroleum reservoirs for enhanced oil recovery purposes are the ways of mitigation of global warming. Dissolution of carbon dioxide in water forms carbonic acid. This acid would react with the carbonate components in carbonate rocks (i.e., CaCO3, MgCO3) and cause dissolution of salts thereaft...

In the fluidized bed reactors, the gas-phase flow turbulent flow increases, causing clotting phenomenon and is away from the bubble flow regime. It also causing a rapid flow regimes and air transport and will be reduced performance of fluidized bed reactor. To solve these problems, in this research, in addition of floor distributor, a secondary dis...

The produced water, which could be a complex mixture of different organic and inorganic compounds (mostly salts, minerals and oils) is a major wastewater stream generated during oil and gas production processes. Due to increase oil and gas exploration and production, especially from unconventional resources like shale oil and gas reservoirs, the vo...

In this research, the chemical absorption rate and solubility of carbon dioxide into DEA aqueous solutions were investigated in a stirrer bubble column. Experiments envelopment the molarity of DEA, CO2 partial pressures and stirrer speed are 0.2-2.0 M, 300-450 kPa and 0-600 rpm, respectively. The DEA and CO2 concentration and gas-liquid flow rate e...

TEOS xerogel was investigated as adsorbent to removal strontium ion from aqueous solution in batch operations. Batch experiments were carried out as a function of pH, initial concentration, time, and temperature. Simple kinetic and thermodynamic models have been applied to the rate and isotherm sorption data and kinetic and thermodynamic parameters...

With respect to the fact that most of the Iran oil reservoirs have elapsed their period of natural depletion, the usage of gas injection techniques renders necessary for EOR purposes. The formation of organic precipitates such as asphaltene and its subsequent precipitation over reservoir rock during the gas injection process is considered a critica...

Spontaneous imbibition is an important IOR process, especially for fractured carbonate reservoirs with low permeability matrix blocks. If the Limestone is oil-wet, the process will not take place. Previous studies have shown that seawater may increase the water-wetness. The sulphate ions in seawater may alter the wetting conditions of the Limestone...

The purpose of this study is mathematical investigation of aggregation adsorption isotherm models in a five parameter equation. This equation can cover Langmuir isotherms, Freundlich, Hill, Redlich-Peterson, Sips, Toth, Koble-Corrigan, Khan and Radke-Prausnitz in the form of an equation. The mentioned equation were fitted with experimental data usi...

Various methods are used to prepare potable water with environmental standards. Among them, membrane filtration has received particular attention in recent years for low operating costs, low volume wastewater and high quality water. Among the conventional membrane filtration methods, nanofiltration ones have been further developed due to high capab...

Biodiesel as an alternative fuel was produced by transesterification of Malaysian RBD (Refined, Bleached, and Deodorized) palm oil with alkaline catalysts. Potassium and sodium hydroxide were used as catalysts in this reaction at temperature of 60 °C in a stirred tank reactor with 600 rpm stirring. Gas chromatography was used to determine the fatty...

Asphaltene deposition is a common problem in oil production and processing. Deposition may occur in reservoir formations, wellbores, production tubing, submersible pumps, surface equipment, and transportation pipelines. Asphaltene deposition in tubing and production facilities will cause operational difficulties and necessitate costly treatments to...

Several well-known correlations such as the Bingham-plastic, power-law, and Herschel−Bulkley models have been used so far to determine the rheological parameters of drilling fluids. For some particular fluids, however, even a three-parameter model such as Herschel−Bulkley does not exhibit appropriate behavior. On the other hand, determination of th...

Ester-based drilling fluids based on aliphatic esters were introduced in 1990. Esters can be synthesized from fatty acids and alcohols. Previous studies indicated that ester hydrolysis in drilling fluids happens only under certain conditions. In order for ester hydrolysis to occur, two primary conditions must be present: high temperature and excess...

In the presence of surface-active reagents, the flux of mass transfer into/from the droplets drastically decreases within the liquid−liquid extraction units. Therefore, particular design equations are required to incorporate the presence of contaminants in the design of industrial-scale extraction columns. In the combinatorial model of Slater, the...

In this study the effect of interactions among the ingredients of synthetic-based fluids (SBFs) on the rheology of the fluid at ambient temperature was investigated. It has been also attempted that through examination on the important variables affecting those interactions, the mechanism of viscosity building in SBFs be identified. Rheology measure...

A new equation (NE) was developed to determine the yield stress in two main groups of drilling fluids, i.e., bentonite-based fluids and viscosified brines. Golden section (GS) technique estimated better values for the yield stress than those of non-linear and non-linear regression with penalty (NLP) methods, and gave positive values for the yield s...

An empirical model was used for the simulation of the experimental data of water-acetone-toluene system in the presence of three surfactants, i.e., SDS, Triton X-100, and DTMAC. Addition of very small amounts of each type of the surfactants to the system lowered the mass transfer coefficient of acetone in the liquid-liquid extraction system. The ef...