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کاربرد نوع شرط:
- جایگاه : پژوهشی
- مجله: Progress in Chemical and Biochemical Research
- نوع مقاله: Journal Article
- کلمات کلیدی: Performance,Gas turbine,Compressor,Cycle,Two Axis,Single Axis
- چکیده:
- چکیده انگلیسی: In this study Analysis and simulating recuperator impact on the thermodynamic performance of the combined water-ammonia cycle Will be investigated. Due to the importance of power generation cycles including double cycles, many studies have been conducted in recent years in this field and many researchers have tried to optimize these cycles using existing methods. In this study, the water-ammonia cycle has been studied. The aim of this paper is to examine the recuperator on the thermodynamic performance of the combined water-ammonia cycle. First, the water-ammonia power generation cycle has been modeled in the current study then, in order to study and compare, the combined Gas-Rankine cycle has been simulated thermodynamically and have been studied from the perspective of the first and second laws of thermodynamics. Finally, the effect of the recuperator on thermodynamic performance has been investigated.
- انتشار مقاله: 15-10-1398
- نویسندگان: Alireza Bozorgian,Alireza Bozorgian,Alireza Bozorgian,Alireza Bozorgian
- مشاهده
- جایگاه : پژوهشی
- مجله: Progress in Chemical and Biochemical Research
- نوع مقاله: Journal Article
- کلمات کلیدی: Membrane,Nano-filtration,pressure,Oil Industry,acid gas
- چکیده:
- چکیده انگلیسی: The presence of H2S and CO2 is unfavorable in many processes and flows, particularly in natural gas flows. Therefore, removing this gas is one of the important issues in many systems. One of the most widely used techniques is the use of membrane. Therefore, the gas that passes through the membrane has low pressure. Membrane system is used to absorb a high volume of CO2. The factors needed for this kind of separation include gas composition, pressure, and temperature difference. An enhanced electrochemical membrane can also be used with coal gas to separate acid gases. Hydrogen is so rich in this process in which cathode and sulphur steam are produced and then exited. Granular activated carbon (GAC) can be used as supporting material to absorb H2S. The advantages of this method are including high capacity for H2S absorption and gas emission. Removing the H2S from waste gases or natural gas with high densities is done via bio-filter in this system. Granular activated carbon can be used as a supporting material to stabilize the microorganisms. Principal properties of the supporting material are including the mass density, the area of special surface, and the amount of its pH. This research discusses the membrane technology in removing the acid gases in the oil technology.
© 2020 by SPC (Sami Publishing Company), Reproduction is permitted for noncommercial purposes.- انتشار مقاله: 20-07-1398
- نویسندگان: Amir Samimi,Soroush Zarinabadi,Alireza Bozorgian,Ahmadreza Amosoltani,Mohammad Sadegh Tarkesh Esfahani,Kasra Kavousi
- مشاهده
- جایگاه : پژوهشی
- مجله: Progress in Chemical and Biochemical Research
- نوع مقاله: Journal Article
- کلمات کلیدی: Crude Oil,hydrogen,Naturl Gas,molar component of water
- چکیده:
- چکیده انگلیسی: Natural gas and crude oil in natural underground reservoirs are in contact with water. Stability of these compounds at the presence of both components and complete dependence on the host molecules by forming holes in their guest molecules are replaced. There are many gases such as methane, ethane, propane, carbon dioxide, hydrogen sulphides that can play the role of guest molecules. The natural gas hydrate formation in different sectors of the oil and gas industry in downstream processes causes the production to stop or decrease. Therefore, the need to know the causes and conditions of hydrate formation is strongly felt. In this study, Van der Waals and Platteeuw model was used to predict hydrate formation conditions. The prediction of hydrate formation conditions needs equilibrium fugacity of gaseous components, and for the equilibrium molar component of water.
- انتشار مقاله: 15-06-1398
- نویسندگان: Alireza Bozorgian,Zahra Arab Aboosadi,Abolfazl Mohammadi,Bizhan Honarvar,Alireza Azimi
- مشاهده
- جایگاه : پژوهشی
- مجله: Progress in Chemical and Biochemical Research
- نوع مقاله: Journal Article
- کلمات کلیدی: Catalyst,Coke,stabilizer,circulating gas,green oil
- چکیده:
- چکیده انگلیسی: Increasing the capacity of Gasoline Production Plant (G.P.P) will cause problems such as the increase of pressure downfall, reduction of output pressure of circulating gas compressor, increasing the thermal load of the re-boiler furnaces of unit towers, increase of the eventuality of formation green oil in vessels, increase of the eventuality of coke formation on the catalyst and eventually reducing the catalyst life span. In this research, operating conditions have been investigated that indicates the increase of the petrochemical feed with the design capacity of 71,000 barrels per day, to the 75,000 barrels per day. The results indicate that with increasing feed, the entrance temperature and pressure to the unit reactor should be increased. According to the obtained results the best temperature (in Feed) is 525 °C, output pressure of circulating gas compressor is more than 22 ton/hr and the circulation of catalysis range is 750-950 kg/hr, the Octane Number will be a Constant Rate 95 and the amount of Coke Formation in all Conditions 3.5-4.3%. The outcomes also show how this approach can be used to gain insight into some refineries and how to deliver results in a comprehensible and user-friendly way.
- انتشار مقاله: 26-04-1398
- نویسندگان: Amir Samimi,Kasra Kavousi,Soroush Zarinabadi,Alireza Bozorgian
- مشاهده
- جایگاه : پژوهشی
- مجله: Journal of Chemical Reviews
- نوع مقاله: Journal Article
- کلمات کلیدی: Water,Temperature,hydrate,Water molecule,Gas,pressure
- چکیده:
- چکیده انگلیسی: Abstract: Gaseous hydrates are ice-like compounds of water and gas that are usually formed at high pressures and low temperatures in such a way that in each of their constituent units a gas molecule is enclosed in a cage of water molecules. Gas hydrate was introduced by Hamrasmith in 1934 as one of the problems of the gas industry in transmission pipelines because by reducing the internal cross section of the pipe, it increases the pressure drop and sometimes may lead to complete blockage of the pipe. Hydrate formation can also lead to the destruction of tools in the process, including valves and sensors, or accumulate in storage tanks, increasing labor costs for cleaning. In industry, one of the thermal, mechanical, thermodynamic and kinetic methods is usually used to prevent the formation or elimination of hydrate. Thermal methods try to keep the gas away from the formation of hydrates by insulating the pipe, using rotating water or hot oil, or by electrically heating the pipe. The use of pigs is a mechanical method to remove clogged tubes due to hydrate formation. It is also possible to change the gas mixture by adding a third material to the fuzzy diagram and eliminate the possibility of hydrate formation at the temperature and operating pressure of the system. Kinetic methods help to improve the working conditions of the gas transmission system by increasing the latency or by reducing the growth rate or adhesion of hydrate crystals.
- انتشار مقاله: 11-05-1399
- نویسندگان: Alireza Bozorgian,Alireza Bozorgian,Alireza Bozorgian
- مشاهده
- جایگاه : پژوهشی
- مجله: Journal of Chemical Reviews
- نوع مقاله: Journal Article
- کلمات کلیدی: Fluid,pump,Well,Gas Overflow,Tank Pressure
- چکیده:
- چکیده انگلیسی: Basically, the design of the gas extraction supplementary string is specific to wells in which the pressure column of the fluid produced is close to or higher than the reservoir pressure. If the reservoir pressure cannot overcome the column of fluid produced or this pressure difference leads to production with low flow, the brain tube must be used. In this way, by pumping gas through this string and lightening the column and producing from the circular space, they solve the problem. In this way, after pumping, the gas comes out of the side of the suction valve and lightens the fluid column. It should be noted, however, that reducing the diameter of the production cavity created by driving such filaments increases the velocity of the fluid and gives the fluid less opportunity to lose its soluble gas. It is obvious that the use of several lateral positions of the overflow valve in the field of overflow with gas has made it possible to inject gas from several points. In the continuous flow of ascent with base gas and the general rule, the energy resulting from the expansion of gas is from a high pressure to a low pressure that can be used to develop and increase the flow of fluid in the well. The use of this energy is generally continuous, which is in the form of continuous injection of gas into the fluid inside the well.
- انتشار مقاله: 11-05-1399
- نویسندگان: Masood Bagheri Sadr,Alireza Bozorgian
- مشاهده
- جایگاه : پژوهشی
- مجله: Journal of Chemical Reviews
- نوع مقاله: Journal Article
- کلمات کلیدی: Well completion,Reservoir structure,GOR,WCT,Well head pressure
- چکیده:
- چکیده انگلیسی: One of the most important parts in choosing a well completion is to study the geological and reservoir structure of the well where the well is located. For instance, if the reservoir material is of a carbonate type, it can be consolidated into an open cavity. If the material of the reservoir where the well is located is sandstone, the first step to take is to determine the rock mechanics properties of the reservoir. In this study, while introducing and presenting a variety of complementary methods, the effects of various variables such as GOR, PI, reservoir pressure and wellhead flowing pressure, water cut, WCT percentages, and choke size reducing on the natural flow rate of the well were investigated.
- انتشار مقاله: 12-10-1398
- نویسندگان: Alireza Bozorgian,Soroush Zarinabadi,Amir Samimi
- مشاهده
- جایگاه : پژوهشی
- مجله: International Journal of New Chemistry
- نوع مقاله: Journal Article
- کلمات کلیدی: Environmental Benefits,hydrate,Thermodynamic Inhibitors,Low Dosage Hydrate Inhibitor
- چکیده:
- چکیده انگلیسی: The absence of high degrees below zero in most part of Iran, especially in the Persian Gulf area, provides suitable conditions for the replacement of thermodynamic inhibitors with kinetic inhibitors. Although it is possible to use kinds of LDHIs (Low Dosage Hydrate Inhibitor), especially kinetic inhibitors in most parts of Iran, it is always necessary that the limitations of these materials are checked before using. Hydrate is an aqueous network with a set of empty spaces in a small distance. If some of this space was filled by gas molecules, the hydrate could be considered as a stable solid. In other words, gas hydrates are complex crystalline molecules that are formed from the mixture of water and suitable gas molecules.
- انتشار مقاله: 09-11-1398
- نویسندگان: Alireza Bozorgian,Amir Samimi
- مشاهده
- جایگاه : پژوهشی
- مجله: International Journal of New Chemistry
- نوع مقاله: Journal Article
- کلمات کلیدی: storage,hydrate,Butyl Ammonium Fluoride,zinc nano oxide
- چکیده:
- چکیده انگلیسی: In this study, the kinetics of gas hydrate formation in the presence of tetra-n-butyl ammonium fluoride (TBAF) and cetyl trimethyl ammonium bromide surface active ingredient (CTAB) with zinc nano oxide (ZnO) are investigated and the most important kinetic parameters of hydrate formation such as their induction time and storage capacity were measured. The kinetic experiments were carried out in a constant volume temperature method in a high pressure reactor. The storage capacity of carbon dioxide hydrate in water in the presence of ZnO and surfactants at different temperatures, pressures and concentrations of TBAF and CTAB additives was calculated and measured using time induction measurements. The results show that with increasing pressure and decreasing temperature, the storage capacity of CO2 in hydrate increases. Finally, statistical analysis of the parameters affecting the induction time of hydrate formation showed that zinc oxide can reduce the induction time of hydrate formation compared to other additives.
- انتشار مقاله: 26-11-1398
- نویسندگان: Seyed Esmaeil Mousavi,Alireza Bozorgian
- مشاهده
- جایگاه : پژوهشی
- مجله: International Journal of Advanced Studies in Humanities and Social Science
- نوع مقاله: Journal Article
- کلمات کلیدی: optimization,Energy,hydrate,Gas,Oil Field
- چکیده:
- چکیده انگلیسی: Production rates from oil fields decrease over time due to various factors, so it is necessary to use methods that to some extent compensate for the reduction in oil and gas production rates. Gas overflow is one of the artificial overflow methods that is used with the aim of rehabilitating and increasing the optimal flow of oil wells. In this method, high pressure gas is injected at a certain point inside the fluid column in the well, thereby reducing the average density and subsequent pressure on the bottom of the well, and thus reactivating the well. In optimizing the operation, increasing the production and benefiting from the maximum operation of the well and its facilities are considered. In this project, two-phase current was model using a mechanistic model and parameters such as pressure profile, temperature, phase fractions and phase velocities are calculated. Then, with the help of node analysis, the natural production of the well is simulated and the need to use the method is investigated. When the reservoir energy (reservoir pressure) is not high enough for continuous production from the well, the artificial overflow method is used in oil production. Gas overflow method is one of the artificial overflow methods that is used to increase oil production from wells. In this method, high pressure gas is injected into the well to make the fluid column lighter and increase the reservoir pressure to produce oil.
- انتشار مقاله: 12-02-1399
- نویسندگان: Alireza Bozorgian,Alireza Bozorgian,Alireza Bozorgian
- مشاهده