Papers by Farshad Farahbod
Renewables: wind, water, and solar, Feb 28, 2023
While desalination of water is energy intensive, traditional use of fossil fuels makes it not onl... more While desalination of water is energy intensive, traditional use of fossil fuels makes it not only costly, but also unsustainable and environmentally unfriendly; utilization of solar energy for desalination is therefore highly encouraged. This paper presents a study on the technical performance of a solar desalination unit located in Tehran city. The process is modeled using standard energy equations and performance indices are defined. The model simulation results are compared with experimental data from laboratory tests. This study observed that there is good agreement between the experimental data and the model simulation results. It is observed that the maximum solar radiation intensity is found in June and the highest evaporation rate in this month is about 5 × 10 -3 m 3 . It is found that the treatment efficacy of the plant decreases with increasing depth of wastewater. Performance of the desalination unit is found to be satisfactory.
Advances in Nanoparticles
In this research, the quality of the wastewater discharged into the environment has been investig... more In this research, the quality of the wastewater discharged into the environment has been investigated. The effluent from solar desalination pond contains large amounts of TDS (3.68 grams per liter) and TH (6.50 grams per liter). Since the use of filter is not economical in this case, three types of commercial coagulants such as aluminum sulfate, ferric chloride and ferric sulfide have been used in this study. The main parameters such as effectiveness of three inorganic coagulants, ammonium sulfate, ferric sulfate, and ferric chloride, which separately help to remove hardness, have been studied. According to the results, using laboratory test, 25/g of ferric sulfate as coagulant is best coagulant mass and the ratio of 4 to 3 for auxiliary coagulant (sodium carbonate and sodium hydroxide) to coagulant will be best ratio. Also, the mixing rate of 120 rpm in the first reactor will give the best mixing speed. These conditions will lead to 0.348 grams per liter of TDS, 0.345 grams per liter of TH and 0.195 grams per liter of calcium hardness and 300 micro Siemens electrical conductivity of the purified sample.
Applied Water Science, Jan 21, 2024
Wastewater can be contaminated with all kinds of microorganisms and small organisms, including ba... more Wastewater can be contaminated with all kinds of microorganisms and small organisms, including bacteria, parasites, fungi and viruses. Therefore, it can be said that biological pollution is one of the most dangerous pollutions. These types of pollution can endanger human health and the environment. In this study, industrial wastewater disinfection has been investigated in a laboratory pilot. In this study, ultraviolet waves have been used for wastewater disinfection. In this research, treatment indicators such as wastewater pH, phosphate, nitrate, biological oxygen and chemical oxygen, organic carbon, and wastewater turbidity have been investigated. The results of this research show that if 4.5 g of dry ice is added to the wastewater entering the disinfection unit, the pH of the wastewater will decrease to about 7.9. The results presented from the disinfection unit show that the amount of chemical oxygen demand and biological oxygen demand have decreased by about 35% and 20.3%, respectively. The results of this unit show that the amount of phosphate and nitrate has decreased by 61.3 and 71.9%, respectively. Laboratory results show that the TDS of wastewater has decreased from 600 to 451 mg/l.
Journal of Petroleum Exploration and Production Technology
The gas condensate is one of the most valuable products of gas refineries. In unit 700 of the Sar... more The gas condensate is one of the most valuable products of gas refineries. In unit 700 of the Sarkhon gas refinery, first, the gas condensate is separated from the feed. Then, the vapor pressure of the gas condensate is stabilized by de-ethanizer and de-butanizer towers. The H-701 and H-702 furnaces act as reboilers of the towers. In this research, unit 700 is simulated by HYSYS software. The product of this unit is examined to achieve desirable conditions. In addition, the best conditions are obtained to reduce the gas loss in this unit. The desirable conditions are introduced according to the operational problems of this unit. In this study, the environmental and economic loss due to the loss of hydrocarbons from the de-butanizer tower is identified. Results of this research show that the best operating temperature and pressure of the first feed are 40 °C and 29 bar, respectively. Also, the best temperature and pressure of the second feed are 20 °C and 28 bar, respectively. Also, ...
Comparison of the physical properties of saline wastewater in a solar pond with nanozinc oxide and nanoaluminum oxide flooring
Applied Nanoscience, Jun 11, 2023
Empirical investigation of sour gas dynamic in a packed column in gas sweetening units with Nano bed
Advances in Nanoparticles, 2023
In this article, a new type of coagulant material has been investigated and the performance of th... more In this article, a new type of coagulant material has been investigated and the performance of the coagulation process using this type of coagulant was evaluated. This new type is a combination of zinc oxide nanoparticles and polyferric sulfate (ZnOPFS). The structure of zinc oxide nanoparticles was determined by spectroscopic, X-ray and electron microscopy methods, and based on this, it was determined that ZnOPFS is a complex and mixed compound that is mainly composed of zinc oxide nanoparticles and ferric sulfate. The effects of Zn/Fe (Zn/Fe) molar ratio and aging (time) on acidity and zeta potential were also evaluated using a specific method. The obtained results showed that in the simultaneous deposition process, zinc ions can prevent the formation of polyferric acid coagulation and subsequently improve the stability of ZnOPFS.
While desalination of water is energy intensive, traditional use of fossil fuels makes it not onl... more While desalination of water is energy intensive, traditional use of fossil fuels makes it not only costly, but also unsustainable and environmentally unfriendly; utilization of solar energy for desalination is therefore highly encouraged. This paper presents a study on the technical performance of a solar desalination unit located in Tehran city. The process is modeled using standard energy equations and performance indices are defined. The model simulation results are compared with experimental data from laboratory tests. This study observed that there is good agreement between the experimental data and the model simulation results. It is observed that the maximum solar radiation intensity is found in June and the highest evaporation rate in this month is about 5 × 10 −3 m 3. It is found that the treatment efficacy of the plant decreases with increasing depth of wastewater. Performance of the desalination unit is found to be satisfactory.
Optimization of desalinationwastewater treatment unit performance; Experimental investigation accompaniedwith artificial neural network and adaptive neural fuzzy interferences modeling
Chemical Technology: An Indian Journal, 2014
Almost high salinity effluent streamof desalination units is drained into the sea or dispersed on... more Almost high salinity effluent streamof desalination units is drained into the sea or dispersed on soil breaking the aqua salt concentration balance and also increase salt content of sea ecosystem or soil. So it is concerned with environmental engineering, corrosion engineering, control engineering, chemical engineering and etc. So zero discharge desalination (ZDD) plants have been proposed with a view of reaching salt and water instead of hazardous saline wastewater. Predicting wastewater pretreatment performance (effluent total hardness, CO2content and electrical conductivity) as the first step in ZDD plants is considered in thiswork both experimentally (on a pilot plant) andmathematically (modelingwith artificial neural network and adaptive neuro fuzzy inference system). So, optimum operating conditions (150 ccAl2(SO4)3 as coagulant, mixing rate in first pretreatment reactor= 110 rpm, 600 cc NaOH and 450 cc Na2CO3 as additives) are recognized, then optimal NN architecture (three layer feed forward back propagation networkwith 10 neurons in hidden layer, Levenberg-Marquardt algorithmis as network training function, tangent sigmoid transfer function) and also optimal ANFIS architecture (five layers with six neurons in two hidden layers, two Bellmembership functions and four rules) are determined. The results confirmpredictivemodeling byANNismost efficient comparing withANFIS in prediction of performance.
Biotechnology 2021: Mixing of Crude Oil with Organic ZnO Nano-Particles from Rice Bran to Improve Physical Properties of Crude Oil: A Novel Agent for Enhanced Oil Recovery- Farshad Farahbod- Department of Chemical and Petroleum Engineering, India
Journal of Biomedical Science, 2021
The parametric investigation of composite cement
Materials Science: An Indian Journal, 2015
Experiments are held to investigate the effect of zinc oxide nano particles on the rheological pr... more Experiments are held to investigate the effect of zinc oxide nano particles on the rheological properties of cement slurry. The main purpose of this study is to improve the rheological properties of cement slurry by nano zinc oxide. The objective of designing cement slurry for extreme and deep environment (HPHT wells) is to develop high performance cement system in well bore to achieve zonal isolation. The primary objective of cement slurry is to improve rheological properties and displacement efficiency of cement system.
Industrial and systems engineering, Jan 10, 2017
The both of light and heavy crude oil are listed as valuable fuels. Investigation of physical pro... more The both of light and heavy crude oil are listed as valuable fuels. Investigation of physical properties of crude oil is so important in the well or in the enhanced oil recovery problems. The enhanced oil recovery which is named as E.O.R. is evaluated by many researchers. The Finding the properties of crude oil after addition of nano particle is considered in this work. Experiments are held to investigate the effect of nano particles on the physical properties of two kinds of heavy crude oil (API =21.45) and light crude oil (API= 32.95). Nano zinc oxide with the range of 75-89 nm in diameter is added in crude oil and changes in recovery%, is surveyed with various temperature and pressure. Experimental results are shown in Figures indicate on the positive effect of nano particles in the oil sweetening processes.
Laboratory and mathematical investigation of salt deposition in a closed solar desalination pond
Environment, Development and Sustainability, Jun 15, 2023
Investigation of thermal and dynamic performance of nano-fluid containing ZnO in heat pipe
Nano Science and Nano Technology An Indian Journal, 2014
The authors investigate thermal and dynamic performance of zinc oxide nanofluid on the heat pipe ... more The authors investigate thermal and dynamic performance of zinc oxide nanofluid on the heat pipe with 0.2 m in length and 0.006 m in diameter in this paper. Two types of zinc oxide nanoparticles with average size of 35 and 55 nm are used in this study. The experiments are conducted to measure and compare temperature, thermal resistance, pressure drop and pumping water of pure water and zinc oxide nanofluid which fills heat pipes. Temperature values are measured in different length of pipe and thermal resistances are obtained in different power. The pressure drop and pumping power are measured in different Reynolds number. The experiments are conducted for pure water and non-pure solutions with variable concentrations that are among 1mg/l to 100mg/l . The experiments show the thermal resistance decreased 15 to 66 percentages when zinc oxide nanoparticles are added to pure water at an input power of 30ÂÂ60 Watt. In addition, the experimental results showthat the thermal resistances of the heat pipe decrease as the size and concentration of zinc oxide increase. The experimental data show that required pumping power and observed pressure drop are increased with the increasing of Reynolds number values and concentration of zinc oxide nanofluid. Comparison of pressure drop values in pure water with that are observed in non-pure solution, 50 mg/l nano zinc oxide with 55 nm in size, show that maximum amount is 80%. Themaximumdeviation between amount of pumping power in purewater and non-pure solution,with 100mg/l zinc oxide nano particles with 55 in diameter, is recorded 92%approximately and this value is related to dual effect of increase in both the pressure drop and the concentration of non-pure solution.
Experimental investigation of coagulation process performance
Chemical Technology: An Indian Journal, 2015
In this paper a novel type of coagulant is studied. The coagulation process performance with usin... more In this paper a novel type of coagulant is studied. The coagulation process performance with using this type of coagulant is evaluated. This new type is the composition of zinc oxide nano particle and poly ferric sulfate (ZnOPFS). The structure of zinc oxide nano particleswas characterized by FTIR, XRD and TEM, suggesting that ZnOPFS is a complex compound with mainly zinc oxide nano particles and ferric sulfate. The effects of Zn/ Fe molar ratios (n) and aging time on the pH and zeta potential were also evaluated systematically.
Simulation study of water and gas injection process into the <scp>Azadegan</scp> reservoir for enhanced oil recovery
Engineering reports, Jun 18, 2023
It is necessary to improve oil production from reservoirs. Various methods have been proposed to ... more It is necessary to improve oil production from reservoirs. Various methods have been proposed to increase oil extraction from reservoir. Each method has specific challenges. In this research, the effect of water and gas injection in to Azadegan reservoir has been analyzed. Azadegan oil field is located south of Iran. In this study, water, immiscible gas and water alternating gas injected to reservoir and its effect on enhanced oil recovery have been investigated. Finally, a comparison between results of methods is provided. Results show that effective method for enhanced oil recovery is immiscible gas injection with 46% oil production efficiency and water alternating gas injection with 36% oil production efficiency. This study shows that oil production efficiency can be increased if duration of gas injection is increased. This study shows, increasing viscosity of water in water alternating gas scenario did not improve the production of Azadegan reservoir.
Advances in Nanoparticles, 2023
In this research, the quality of the wastewater discharged into the environment has been investig... more In this research, the quality of the wastewater discharged into the environment has been investigated. The effluent from solar desalination pond contains large amounts of TDS (3.68 grams per liter) and TH (6.50 grams per liter). Since the use of filter is not economical in this case, three types of commercial coagulants such as aluminum sulfate, ferric chloride and ferric sulfide have been used in this study. The main parameters such as effectiveness of three inorganic coagulants, ammonium sulfate, ferric sulfate, and ferric chloride, which separately help to remove hardness, have been studied. According to the results, using laboratory test, 25/g of ferric sulfate as coagulant is best coagulant mass and the ratio of 4 to 3 for auxiliary coagulant (sodium carbonate and sodium hydroxide) to coagulant will be best ratio. Also, the mixing rate of 120 rpm in the first reactor will give the best mixing speed. These conditions will lead to 0.348 grams per liter of TDS, 0.345 grams per liter of TH and 0.195 grams per liter of calcium hardness and 300 micro Siemens electrical conductivity of the purified sample.
Synthesis, characterization and photocatalytic performance of modified ZnO nanoparticles with SnO<sub>2</sub> nanoparticles
Materials research express, Jun 27, 2018
Chemical and biomolecular engineering, Feb 3, 2017
Operating conditions chosen in petroleum industries depends on the characteristics of oil which i... more Operating conditions chosen in petroleum industries depends on the characteristics of oil which is processed. Knowing about the behavior of oil fluid flow at different amounts of operating pressure and temperature is essential to manufacture the proper equipment and handling the processes. This is more important especially about the new type of oil which contains nano particle. In this study, the dimensionless groups and thermo physic parameters of the nano oil are considered to determine the nano oil behavior. Results show the average increase in the amount of density by addition of 1% of nano ferric oxide is about 1.8%. The addition of nano ferric oxide decreases the value of effective viscosity about the 27%, averagely than the simple oil. The increase in temperature shows the same decraese in the value of effective viscosity for simple oil and nano oil.
Organic Chemistry: An Indian Journal, 2014
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Papers by Farshad Farahbod