Azadeh Mirvakili

Azadeh Mirvakili
Persian Gulf University | PGU · Department of Chemical Engineering

PhD

About

40
Publications
29,809
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531
Citations
Introduction
Azadeh Mirvakili currently works at the Department of Chemical Engineering, Oil and Gas, Persian Gulf University. Azadeh does research in Chemical Engineering. Their most recent publication is 'Investigation and recovery of purge gas streams to enhance synthesis gas production in a mega methanol complex'.

Publications

Publications (40)
Article
Full-text available
In this study, a novel plate methanol reactor (shell and plate) with a higher heat transfer rate compared to the conventional counterparts (shell and tube) was investigated. In fact, in the new configuration, all of the tubes were replaced with plates, and thereby the heat transfer area increased. To compare the two configurations (the conventional...
Article
A three-bed ammonia reactor with the radial-axial flow and two heat exchangers in the rector's middle has been studied. According to the fluid regime type with two-dimensional axial-radial flow and intercooler, this reactor is different from the previous generation. Two-dimensional mathematical modelling is utilized to predict fluid flow, concentra...
Article
In this study, the condensation of methanol and water in unoccupied layers near the coolant tubes of the gas-cooled reactor in mega-methanol plants are investigated. In the Lurgi mega-methanol plants, named conventional configuration (CC), water-cooled reactors are in series with the gas-cooled reactor. These reactors are composed of only two secti...
Article
On the presumption that an axial-radial flow pattern (AR) can contribute to a more even distribution of fresh syngas over the catalyst bed, in this study, effects of AR pattern in a mega methanol plate reactor are studied, and the corresponding results are compared with that of fully axial (APR) or radial (RPR) ones. For this purpose, a two-dimensi...
Article
Full-text available
In the current study, the utilization of parallel reactors instead of series configurations in the mega methanol plants is investigated. In the conventional reactor (CR), two parallel fixed bed water-cooled reactors are in series with a gas-cooled reactor. In this study, three novel configurations are proposed in which the gas-cooled is in parallel...
Article
The push to control the greenhouse gas emissions is motivated by environmental regulations. For the aim to be achieved, the suggestion of eliminating or at least reducing gas flaring is currently taken under environment. In this regard, a new configuration for flare gas treatment is proposed in this study. This configuration is aimed to collect H 2...
Article
A two-step configuration consisting water-cooled and gas-cooled reactors has been developed by Lurgi to produce methanol from natural gas. The gas-cooled reactor, which is a vertical shell and tube heat exchanger, is constructed by fixed tube sheets with the cold gas stream in the tube side to properly cool the reacting gas mixture in the shell sid...
Article
Proposing novel strategies for minimization of gas flaring is currently of a great importance. Such strategies could eliminate the drawbacks of burning purge gas and even lead to higher process efficiency. Accordingly, a recovery unit based on membrane separation is proposed in the present contribution. This separation unit is aimed to remove hydro...
Article
Nowadays, by the increasing attention to environment and high rate of fuel production, recycling of purge gas as reactant to a reactor is highly considered. In this study, it is proposed that the purge gases of methanol production unit, which are approximately15.018 t·h− 1 in the largest methanol production complexes in the world, can be recycled t...
Article
Full-text available
1 * ‫میروکیلی‬ ‫آزاده‬ ، 2 ‫مریم‬ ، ‫ابراه‬ ‫یم‬ ‫زاده‬ ‫سروستانی‬ : 1 ‫شیراز‬ ‫دانشگاه‬ ‫گاز،‬ ‫و‬ ‫شیمی،نفت‬ ‫مهندسی‬ ‫دانشکده‬ ‫ارشد،‬ ‫کارشناسی‬ ‫دانشجوی‬ 2 ‫دانشکده‬ ‫استادیار،‬ ‫گاز‬ ‫و‬ ‫شیمی،نفت‬ ‫مهندسی‬ ‫دانشگاه‬ ، ‫خل‬ ‫یج‬ ‫فارس‬ ‫بوشهر‬ ، 3 ‫شیراز‬ ‫گاز،دانشگاه‬ ‫و‬ ‫شیمی،نفت‬ ‫مهندسی‬ ‫دانشکده‬ ‫ارشد،‬ ‫کارشناسی‬ ‫دانشجوی‬ ‫چکیده‬ ‫در...
Article
The aim of this work is a comparison of different hydrogen permeation membranes in a thermally coupled membrane reactor in producing two precious chemicals, hydrogen and styrene. A thermally coupled membrane reactor is designed as a double pipe reactor where methane tri-reforming for hydrogen production is considered in exothermic side of reactor a...
Article
Nowadays, methanol has gained great importance as an alternative fuel and a product which can be considered as a CO2 utilization in novel processes; nevertheless, there is no adequate work on purge gas streams in current conventional methanol complexes. This study aims to specify main waste gasses in one of the biggest methanol plants in the world,...
Article
Biodiesel is a clean renewable fuel which is an alternative source of diesel fuel in compression ignition engines without any modification. According to previous research, the importance of biodiesel production through heterogeneous transesterification of waste cooking palm oil (WCPO) over Sr/ZrO2 catalyst has led to developing a new mathematical a...
Article
The current study highlights the significance of optimum recycle purge gas ratio (Φ) to methanol synthesis reactor calculated via a one dimensional modeling of process and also proposes an environmentally friendly process. Moreover, Differential Evolution (DE) method is applied to maximize methanol mole fraction. The purge gas of this process inclu...
Article
Design of dual type methanol reactor includes a gas cooled reactor for methanol synthesis. The gas cooled reactor faces with the problem of gas condensate formation and two phase flow in the practical operating conditions owing to a high temperature drop in the last 2 m of the reactor length. In this study, three strategies are proposed in order to...
Article
Full-text available
Ammonium nitrate thermal decomposition in a fluidized bed reactor (FR) is considered a suitable chemical-free disposal option for the aqueous waste nitrate stream. In this study, operating conditions of ammonium nitrate thermal decomposition are optimized via differential evolution (DE) method to minimize the concentration of ammonium nitrate at th...
Article
The low-temperature Fischer-Tropsch (LTFT) process aims to produce heavy cuts such as wax and diesel. For many years, there have been studies and improvements on the LTFT process to make the existing reactors more efficient. Recent studies have proposed innovative configurations such as monolithic loop and membrane reactors as well as microchannel...
Article
In thermal decomposition process, ammonium nitrate decomposition takes place in fluidized bed reactor (FR) and nitrogen oxide (NOx), as an undesirable product is produced in high temperatures. In this study, two novel configurations named membrane fluidized bed reactor (MFR) and free air membrane fluidized bed reactor (AMFR) is proposed to reduce N...
Article
Matrix acidizing treatments are applied to gas wells to remove near-wellbore permeability impairment (formation damage).This work relates to the use of some alcoholic components as a retarding agent in gas field acidizing operations to reduce rate of calcium carbonate (dolomite MgCa(CO3)2) dissolution by acid. The retarding agent is feasible to “re...
Article
Because of environmental concerns about nitrate and NOx emissions, the present study proposes a novel configuration in order to enhance thermal decomposition of ammonium nitrate (AN) in an environmentally friendly manner. Conventional thermal decomposition of AN takes place in a fluidized-bed reactor (FR) at high temperature, causing high AN conver...
Article
In this study, decalin and hydrogen looping approach is proposed in optimized thermally coupled membrane ternary reactors in gas-to-liquid technology (GTL). This novel configuration is named thermally coupled membrane ternary reactor (TCMTR), in which decalin dehydrogenation reaction is coupled with Fischer–Tropsch synthesis (FTS) reactions. Three...
Article
In acidizing process, the pH of acid increases gradually. When PH is higher than about 2.2, Fe3+ forms a black sticky precipitant that decreases well permeability. Therefore, using Ferric ion reducing agent as an additive is a proper way to prevent of precipitant formation. In this study, some materials are introduced as reducing agents and compare...
Article
Full-text available
The present study proposes a novel configuration for cooling system of Fischer–Tropsch synthesis (FTS) reactor. In this new configuration, nanofluid is used as a coolant inside the shell of fixed bed reactor of FTS. This novel concept has been named nanofluid-cooled fixed bed reactor (NFR). Aqueous based nanofluids consist of alumina nanoparticles...
Article
Decalin can be used as an energy carrier and hydrogen storage. This paper conducts an analysis of the decalin looping approach in optimized thermally coupled dual methanol reactor (OTCDMR) for simultaneous hydrogen production and consumption. This configuration takes the advantages of couple technique and membrane technology simultaneously. In the...
Article
Full-text available
This work relates generally to the use of surfactants in oil field acidizing operations to reduce emulsion and sludge formation in such operations. The demulsifier and antisludge are two of the most important additives in oil well acidizing. During oil well acidizing, an antisludge agent prevents asphaltene aggregation (sludge formation), and a dem...
Article
In this study, cyclohexane and hydrogen loop approach is proposed in optimized thermally coupled dual reactors in methanol production via Differential Evolution (DE) method. This new generation of thermally coupled membrane reactors uses simultaneously the advantages of hydrogen carrier characteristic and multifunctional reactors. This configuratio...
Article
In order to eliminate the pressure drop problem and mal distribution of the temperature profile along the reactors, fluidized-bed membrane reactors are proposed as an alternative for Fischer–Tropsch synthesis (FTS) in gas-to-liquid (GTL) technology. Regarding this, a novel cascading fluidized-bed membrane reactor (CFMR) is proposed in this study an...
Article
Due to proposing hydrogen as the main energy carrier, technologies including production, storage and utilization of hydrogen have attracted increasing attention recently. Regarding this, the feasibility of decalin as a promising hydrogen carrier is investigated in this study. The performance of decalin thermally coupled membrane reactor (DCTCMR) is...
Article
In this study, the operating conditions of a thermally coupled membrane reactor (TCMR) in gas-to-liquid (GTL) technology are optimized via differential evolution (DE) method to maximize the hydrogen mole fraction in the endothermic side as well as the gasoline yield in the exothermic side. TCMR is designed as a double pipe reactor where highly exot...
Article
The present study proposes a novel configuration of Fischer–Tropsch synthesis (FTS) reactors in which a fixed-bed water perm-selective membrane reactor is followed by a fluidized-bed hydrogen perm-selective membrane reactor. This novel concept which has been named fixed-bed membrane reactor followed by fluidized-bed membrane reactor (FMFMDR) produc...
Article
A thermally coupled membrane dual-type reactor (TCMDR) has been proposed for simultaneous hydrogen production and utilization in gas-to-liquid technology (GTL). Decalin dehydrogenation reaction is coupled with Fischer–Tropsch synthesis (FTS) reaction to improve the heat transfer between endothermic and exothermic sides. Furthermore, Pd–Ag and Hydro...

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