2024 |
Salehabadi A, Zanganeh J, Moghtaderi B, 'Mixed metal oxides in catalytic ammonia cracking process for green hydrogen production: A review', International Journal of Hydrogen Energy, 63 828-843 (2024)
|
|
|
2023 |
Peng Z, Zanganeh J, Moghtaderi B, 'Influence of Gradually Inflated Obstructions on Flame Propagation in a Tube Closed at One End', Fire, 6 154-154 [C1]
|
|
Nova |
2023 |
Shirzaei M, Zanganeh J, Moghtaderi B, 'Obstacle Impacts on Methane-Air Flame Propagation Properties in Straight Pipes', Fire, 6 (2023) [C1]
Accidental flame initiation to propagation in pipes carrying flammable gases is a significant safety concern that can potentially result in loss of life and substantial damage to ... [more]
Accidental flame initiation to propagation in pipes carrying flammable gases is a significant safety concern that can potentially result in loss of life and substantial damage to property. The understanding of flame propagation characteristics caused by methane¿air mixtures within various extractive and associated process industries such as coal mining is critical in developing effective and safe fire prevention and mitigation countermeasures. The aim of this study is to investigate and visualise the fire and explosion properties of a methane¿air mixture in a straight pipe with and without obstacles. The experimental setup included modular starting pipes, an array of sensors (flame, temperature, and pressure), a gas injection system, a gas analyser, data acquisition and a control system. The resulting observations indicated that the presence of obstacles within a straight pipe eventuated an increase in flame propagation speed and deflagration overpressure as well as a reduction in the elapsed time of flame propagation. The maximum flame propagation speed in the presence of an orifice with a 70% blockage ratio at multiple spots was increased around 1.7 times when compared to the pipe without obstacles for 10% methane concentration. The findings of this study will augment the body of scientific knowledge and assist extractive and associated process industries, including stakeholders in coal mining to develop better strategies for preventing or reducing the incidence of methane¿air flame propagation caused by accidental fires.
|
|
Nova |
2023 |
Rahimpour HR, Zanganeh J, Moghtaderi B, 'Abatement of Greenhouse Gas Emissions from Ventilation Air Methane (VAM) Using Ionic Liquids: A Review of Experimental Methods and Modelling Approaches', Processes, 11 (2023) [C1]
Ventilation Air Methane (VAM) refers to the release of fugitive methane (CH4) emissions into the atmosphere during underground coal mining operations. Growing concerns regarding t... [more]
Ventilation Air Methane (VAM) refers to the release of fugitive methane (CH4) emissions into the atmosphere during underground coal mining operations. Growing concerns regarding the greenhouse effects of CH4 have led to a worldwide effort in developing efficient and cost-effective methods of capturing CH4. Among these, absorption-based processes, particularly those using Ionic Liquids (ILs) are appealing due to their advantages over conventional methods. In this study, the solubility of CH4 in various ILs, expressed by Henry¿s law constant, is first reviewed by examining a wide range of experimental techniques. This is followed by a review of thermodynamic modelling tools such as the extended Henry¿s law model, extended Pitzer¿s model, Peng¿Robinson (PR) equation of state, and Krichevsky-Kasarnovsky (KK) equation of state as well as computational (Artificial Neural Network) modelling approaches. The comprehensive analysis presented in this paper aims to provide a deeper understanding of the factors that significantly influence the process of interest. Furthermore, the study provides a critical examination of recent advancements and innovations in CH4 capture by ILs. ILs, in general, have a higher selectivity for methane compared to conventional solvents. This means that ILs can remove methane more effectively from VAM, resulting in a higher purity of the recovered methane. Overall, ILs offer several advantages over conventional solvents for the after treatment of VAM. They are more selective, less volatile, have a wider temperature range, are chemically stable, and can be made from renewable materials. As a result of their many advantages, ILs are becoming increasingly popular for the after treatment of VAM. They offer a more sustainable, efficient, and safe alternative to conventional solvents, and they are likely to continue gaining market share in the coming years.
|
|
Nova |
2021 |
Peng Z, Zanganeh J, Moghtaderi B, 'CFD Modeling of Flame Jump across Air Gap between Evase and Capture Duct for Ventilation Air Methane Abatement', PROCESSES, 9 (2021) [C1]
|
|
Nova |
2021 |
Peng Z, Zanganeh J, Ingle R, Nakod P, Fletcher DF, Moghtaderi B, 'CFD Investigation of Flame and Pressure Wave Propagation through Variable Concentration Methane-Air Mixtures in a Tube Closed at One End', Combustion Science and Technology, 193 1203-1230 (2021) [C1]
CFD modeling of methane-air combustion and the subsequent flame and pressure wave propagations from the closed end of a detonation tube is presented, with a focus on propagation t... [more]
CFD modeling of methane-air combustion and the subsequent flame and pressure wave propagations from the closed end of a detonation tube is presented, with a focus on propagation through variable concentration mixtures. A partially premixed combustion model that avoids the need to specify the flame speed is developed based upon the Flamelet Generated Manifold (FGM) model and needs no tuning to account for different methane concentrations. The numerical model is extensively validated using the experimental data collected from a large-scale detonation tube. The results show that the pressure wave propagation experiences three sequential stages: i) growth; ii) decoupling; and iii) decay. The peak overpressure is generated in the pressure wave growth stage in which the wave front transiently couples with the flame front, and the confined tube walls induce lateral wave reflections and force the flame front to transit from spherical to planar. Subsequently, the wave front starts decoupling from the flame front, with an almost constant global maximum pressure. After decoupling, the global maximum pressure drops because of the energy loss incurred through the wave propagation. The different methane concentrations introduced initially after the explosion chamber containing a stoichiometric mixture do not affect the peak overpressure or the pressure wave propagation but do affect the profile and propagation of the flame. Exponential acceleration of the flame propagation speed is found in the growth stage of pressure wave propagation, followed by the transition to a linear acceleration stage. For cases with the methane concentration becoming smaller than the stoichiometric concentration, the linear flame acceleration rate is smaller, with more pronounced flame stretching.
|
|
Nova |
2020 |
Najafpoor A, Norouzian-Ostad R, Alidadi H, Rohani-Bastami T, Davoudi M, Barjasteh-Askari F, Zanganeh J, 'Effect of magnetic nanoparticles and silver-loaded magnetic nanoparticles on advanced wastewater treatment and disinfection', Journal of Molecular Liquids, 303 (2020) [C1]
|
|
Nova |
2020 |
Zanganeh J, Al-Zuraiji MJA, Moghtaderi B, 'Capture and Mitigation of Fugitive Methane: Examining the Characteristics of Methane Explosions in an Explosion Chamber Connected to a Venting Duct', ENERGY & FUELS, 34 645-654 (2020) [C1]
|
|
Nova |
2020 |
Nadaraju FJ, Maddocks AR, Zanganeh J, Moghtaderi B, 'Ventilation air methane: a simulation of an optimised process of abatement with power and cooling', Mining Technology: Transactions of the Institute of Mining and Metallurgy, 129 9-21 (2020) [C1]
|
|
Nova |
2020 |
Peng Z, Zanganeh J, Ingle R, Nakod P, Fletcher DF, Moghtaderi B, 'Effect of Tube Size on Flame and Pressure Wave Propagation in a Tube Closed at One End: A Numerical Study', Combustion Science and Technology, 192 1731-1753 (2020) [C1]
|
|
Nova |
2019 |
Peng Z, Zanganeh J, Doroodchi E, Moghtaderi B, 'Flame Propagation and Reflections of Pressure Waves through Fixed Beds of RTO Devices: A CFD Study', Industrial and Engineering Chemistry Research, 58 23389-23404 (2019) [C1]
|
|
Nova |
2019 |
AL-Zuraiji MJA, Zanganeh J, Moghtaderi B, 'Application of flame arrester in mitigation of explosion and flame deflagration of ventilation air methane', Fuel, 257 (2019) [C1]
|
|
Nova |
2019 |
Nadaraju FJ, Maddocks AR, Zanganeh J, Moghtaderi B, 'Simulation of power and cooling generation via heat recovery from a ventilation air methane abatement unit', Fuel, 249 27-35 (2019) [C1]
|
|
Nova |
2019 |
Alghamdi Y, Peng Z, Zanganeh J, Moghtaderi B, Doroodchi E, 'Hydrodynamics similarities in cold flow model of chemical looping combustors: An experimental study', Powder Technology, 343 542-550 (2019) [C1]
|
|
Nova |
2019 |
Khairul MA, Zanganeh J, Moghtaderi B, 'The composition, recycling and utilisation of Bayer red mud', Resources, Conservation and Recycling, 141 483-498 (2019) [C1]
|
|
Nova |
2018 |
Jamali-Behnam F, Najafpoor AA, Davoudi M, Rohani-Bastami T, Alidadi H, Esmaily H, Dolatabadi M, 'Adsorptive removal of arsenic from aqueous solutions using magnetite nanoparticles and silica-coated magnetite nanoparticles', Environmental Progress and Sustainable Energy, 37 951-960 (2018) [C1]
Magnetite nanosorbents are known with high sorption capacity and ease of solid phase separation from surrounding liquid by the imposed external magnetic field. In this study, magn... [more]
Magnetite nanosorbents are known with high sorption capacity and ease of solid phase separation from surrounding liquid by the imposed external magnetic field. In this study, magnetite nanoparticles (MNPs) and silica-coated magnetite nanoparticles (Si-MNPs) were prepared and used for the removal of arsenic (III) from aqueous solutions. The nanosorbents were characterized by transmission electron microscope, X-ray diffraction, Fourier transform infrared spectroscopy, and vibrating sample magnetometer. The spherical Fe3O4 nanoparticles in diameter of about 100 nm and SiO2 shells of 12 nm were formed. The saturation magnetization was found to be 78 and 58 e mug¿1 for MNPs and Si-MNPs, respectively. Under optimal conditions, both nanosorbents were very efficient for arsenite uptake (removal efficiency =99%). The highest removal percentage was obtained near PZC of nanosorbents where the net surface charge was zero. The MNPs exhibited higher sorption capacities in comparison with Si-MNPs although they tended to be agglomerated in higher applied doses. The kinetic of experiments indicated the best fit to the pseudo-second order model. Furthermore, the experimental data were best described by the Langmuir model. This study demonstrated the effectiveness of bare and silica coated magnetic nanoparticles to remove trace concentrations of arsenic (III) in water environment. © 2017 American Institute of Chemical Engineers Environ Prog, 37: 951¿960, 2018.
|
|
|
2018 |
Kundu SK, Zanganeh J, Eschebach D, Badat Y, Moghtaderi B, 'Confined explosion of methane-air mixtures under turbulence', Fuel, 220 471-480 (2018) [C1]
|
|
Nova |
2018 |
Nadaraju FJ, Maddocks AR, Zanganeh J, Moghtaderi B, 'Thermodynamic Assessment of Heat Recovery from a Fluidized-Bed Ventilation Air Methane Abatement Unit', ENERGY & FUELS, 32 4579-4585 (2018) [C1]
|
|
Nova |
2018 |
Kundu SK, Zanganeh J, Eschebach D, Moghtaderi B, 'Explosion severity of methane coal dust hybrid mixtures in a ducted spherical vessel', Powder Technology, 323 95-102 (2018) [C1]
|
|
Nova |
2018 |
Ajrash MJ, Zanganeh J, Moghtaderi B, 'Flame deflagration in side-on vented detonation tubes: a large scale study', Journal of Hazardous Materials, 345 38-47 (2018) [C1]
|
|
Nova |
2017 |
Ajrash MJ, Zanganeh J, Moghtaderi B, 'Deflagration of premixed methane air in a large scale detonation tube', Process Safety and Environmental Protection, 109 374-386 (2017) [C1]
|
|
Nova |
2017 |
Kundu SK, Zanganeh J, Eschebach D, Mahinpey N, Moghtaderi B, 'Explosion characteristics of methane air mixtures in a spherical vessel connected with a duct', Process Safety and Environmental Protection, 111 85-93 (2017) [C1]
|
|
Nova |
2017 |
Ajrash MJ, Zanganeh J, Moghtaderi B, 'The effects of coal dust concentrations and particle sizes on the minimum auto-ignition temperature of a coal dust cloud', Fire and Materials, 41 908-915 (2017) [C1]
|
|
Nova |
2017 |
Ajrash MJ, Zanganeh J, Moghtaderi B, 'The flame deflagration of hybrid methane coal dusts in a large-scale detonation tube (LSDT)', FUEL, 194 491-502 (2017) [C1]
|
|
Nova |
2017 |
Ajrash MJ, Zanganeh J, Moghtaderi B, 'Impact of suspended coal dusts on methane deflagration properties in a large-scale straight duct', JOURNAL OF HAZARDOUS MATERIALS, 338 334-342 (2017) [C1]
|
|
Nova |
2017 |
Ajrash MJ, Zanganeh J, Moghtaderi B, 'Experimental evaluation and analysis of methane fire and explosion mitigation using isolation valves integrated with a vent system', Journal of Hazardous Materials, 339 301-309 (2017) [C1]
There has been a surge of interest from the extractive industries in the application of mechanical means to the mitigation of flame deflagration. To verify the implementation and ... [more]
There has been a surge of interest from the extractive industries in the application of mechanical means to the mitigation of flame deflagration. To verify the implementation and performance of passive and active mitigation protection, a comprehensive experimental investigation has been conducted on a large scale detonation tube, 30¿m long and 0.5¿m in diameter, with two mitigation valves (passive and active) and a burst panel venting system. The valves were used alternately to mitigate the flame deflagration of methane in concentrations ranging from 1.25% to 7.5%. The experimental work revealed that locating the passive mitigation valve at 22¿m distance from the ignition source mitigates the flame by fully isolating the tube. However, closing the valve structure in the axial direction generated another pressure wave upstream, which was approximately the same value as for the original pressure wave upstream. In the case of the active mitigation system, the system perfectly isolated upstream from downstream with no further pressure wave generation. When the vent was located at 6.5¿m from the ignition source, the total pressure was reduced by 0.48¿bar. Due to the counter flow of the reflected pressure wave the flame was extinguished at 12.5¿m from the ignition source.
|
|
Nova |
2017 |
Ajrash MJ, Zanganeh J, Moghtaderi B, 'Influences of the Initial Ignition Energy on Methane Explosion in a Flame Deflagration Tube', ENERGY & FUELS, 31 6422-6434 (2017) [C1]
|
|
Nova |
2016 |
Zhou C, Shah K, Song H, Zanganeh J, Doroodchi E, Moghtaderi B, 'Integration Options and Economic Analysis of an Integrated Chemical Looping Air Separation Process for Oxy-fuel Combustion', Energy and Fuels, 30 1741-1755 (2016) [C1]
This paper is concerned about a detailed techno-economic assessment of a hypothetical 500 MWe coal-fired power plant in New South Wales, Australia, for oxy-fuel conversion using i... [more]
This paper is concerned about a detailed techno-economic assessment of a hypothetical 500 MWe coal-fired power plant in New South Wales, Australia, for oxy-fuel conversion using integrated chemical looping air separation (ICLAS) technology and cryogenic air separation unit (CASU). The key objectives of this study are to (i) investigate and compare the detailed integration options for oxy-fuel conversion using ICLAS and CASU and (ii) determine the technical merits of the above integration options and the conditions at which the technologies become economically feasible. The study produced scientific evidence that confirms the viability of the CLAS process from both technical and economic points of view under certain conditions. The detailed technical analysis revealed that ICLAS with natural gas integration is energy-efficient compared to CASU running on parasitic load. This is primarily due to the fact that ICLAS needs less auxiliary power compared to CASU. Despite the fact that ICLAS natural gas integration has resulted in higher efficiencies than CASU running on parasitic load, from a series of detailed economic analyses, it was observed that both ICLAS and CASU may not be viable under the present operating and economic conditions. Nevertheless, from sensitivity analysis, it was concluded that ICLAS can become feasible if economic conditions are improved, e.g., a low natural gas market price (<$3.5/GJ), a high electricity wholesale price (>$59/MWh), and/or a high carbon tax (>$33/tonne).
|
|
Nova |
2016 |
Ajrash MJ, Zanganeh J, Moghtaderi B, 'Methane-coal dust hybrid fuel explosion properties in a large scale cylindrical explosion chamber', Journal of Loss Prevention in the Process Industries, 40 317-328 (2016) [C1]
The fires and explosions caused by flammable hydrocarbon air mixtures are a major safety concern in the chemical and processing industries. The thermo-physical and chemical proper... [more]
The fires and explosions caused by flammable hydrocarbon air mixtures are a major safety concern in the chemical and processing industries. The thermo-physical and chemical properties of the flammable fuels in a hybrid form appear to have a significant impact on the combustion process. This usually occurs due to substantial changes in the flammability concentration regimes. The aim of this study is to investigate the fire and explosive properties of hybrid fuels in the chemical and process industries. In addition, it examines the impact of the ignition energy and vessel geometry on the magnitude of the pressure rise and flame propagation velocity. The experimental work was conducted on a cylindrically shaped explosion chamber constructed as part of this study at The University of Newcastle, Australia. The chamber was made of mild steel and was 30 m in length and 0.5 in diameter. It included a series of high resolution pressure transducers, a pyrometer, as well as a high speed video camera. Methane and coal dust were used as fuels and chemical igniters with a known energy were used to ignite the fuels.The results obtained from this study showed that both the ignition energy and the diluted combustible fuel dust have significant impacts on the Over Pressure Rise (OPR) in an explosion chamber. The significant findings included that the OPR doubled when 30 g m-3 of coal dust was added to a 6% methane/air mixture, and it increased by 60% when 10 kJ was used instead of a 1 kJ ignition source. The initial ignition energy was observed to considerably enhance the speed of both the pressure wave and the flame front, where the pressure wave speed doubled when using a 5 kJ instead of a 1 kJ ignition source. However, the pressure wave speed increased by five times when a 10 kJ was used instead of a 1 kJ ignition source. Additionally, the maximum flame front velocity observed for the ignition source with 5 kJ energy was twice the flame front velocity for the 1 kJ ignition source. Finally, it was observed that the time needed for the initial methane ignition was reduced by about 50% when using a 10 kJ instead of a 1 kJ ignition source.
|
|
Nova |
2016 |
Ajrash MJ, Zanganeh J, Moghtaderi B, 'Experimental investigation of the minimum auto-ignition temperature (MAIT) of the coal dust layer in a hot and humid environment', Fire Safety Journal, 82 12-22 (2016) [C1]
Ventilation Air Methane (VAM) abatement technology is recognized as a promising and value adding technique for reducing fugitive methane emissions, however, it also increases the ... [more]
Ventilation Air Methane (VAM) abatement technology is recognized as a promising and value adding technique for reducing fugitive methane emissions, however, it also increases the potential fire and explosion risks of overheated coal dust. To eliminate these risks from the abatement systems it is necessary to determine the critical combustion characteristics of the minimum auto ignition temperature (MAIT) for a coal dust layer. This study investigates the auto-ignition behavior of coal dust layers in a humid environment with Relative Humidity (RH) >80%. The MAIT of four different coal dust samples (Australian coal) with particle sizes below 212 µm and dust layer thicknesses of 5, 12 and 15 mm were measured using a dust layer auto ignition temperature apparatus in accordance with the ASTM E2021 standard. It was concluded that the MAIT of the coal dust layer significantly decreases with decreasing particle size. The MAIT for the coal samples with a smaller D50 size were observed to be lower in comparison with samples with a larger D50 size. The dust layer thickness was shown to significantly impact on the MAIT. The MAIT increased proportionally with the increasing thickness of the coal dust layer. The effect of the coal dust moisture content and humidity on the MAIT for compacted dust layers was noticeable, whereas, this effect was less important with loose dust layers. In addition, this work investigated and compared the MAIT for a typical coal dust sample based on the existing ASTM and International Electrotechnical Commission (IEC) standard procedures for ignition of coal dust layers.
|
|
Nova |
2016 |
Luo C, Zanganeh J, Moghtaderi B, 'A 3D numerical study on the effects of obstacles on flame propagation in a cylindrical explosion vessel connected to a vented tube', Journal of Loss Prevention in the Process Industries, 44 53-61 (2016) [C1]
This article presents a numerical study of the explosive wave propagations from a 40¿cm long and 10.8¿cm diameter cylinder to smaller 1.7¿m and 2.6¿m long cylinders with 36¿mm dia... [more]
This article presents a numerical study of the explosive wave propagations from a 40¿cm long and 10.8¿cm diameter cylinder to smaller 1.7¿m and 2.6¿m long cylinders with 36¿mm diameters. Initially, the 40¿cm long cylinder was filled with 4% propane-air mixtures and ignited with a 1¿kJ sparking energy until the maximum temperature near the ignition source reached 2400/3000¿K. In the study, a 3D numerical model was established by combining compressible four-step reduced propane oxidation reaction kinetics with the k-¿ shear-stress transport (SST) turbulent model. In order to resolve the thin detonation wave front, a dynamically refined mesh near the high pressure gradient was adopted. The pressure gradient profiles, velocity magnitude contours, temperature contours and compressible wave propagation speeds across the tubes were then predicted using this 3D model.
|
|
Nova |
2016 |
Alidadi H, Najafpoor AA, Hosseinzadeh A, Dolatabadi Takabi M, Esmaili H, Zanganeh J, Piranloo FG, 'Waste recycling by vermicomposting: Maturity and quality assessment via dehydrogenase enzyme activity, lignin, water soluble carbon, nitrogen, phosphorous and other indicators', Journal of Environmental Management, 182 134-140 (2016) [C1]
Present study aims to examine the dynamics of maturation and qualification indicators in various vermicompost treatments and selection of the best treatment along with best matura... [more]
Present study aims to examine the dynamics of maturation and qualification indicators in various vermicompost treatments and selection of the best treatment along with best maturation time in this regard. In this empirical study, dynamics of chemical (pH, electrical conductivity (EC), total nitrogen (TN), phosphorous, lignin, water soluble carbon (WSC), C/N, NH4/NO3) and biological (dehydrogenase enzyme (DEH) and DEH/WSC) properties were investigated in four various treatments, including various ratios of compost produced from municipal solid waste (MSW) and carbonaceous materials (50:50, 70:30, 85:15 and 100:0) over 100 days. Results showed a significant fluctuation in EC, DEH and DEH/WSC proportions over the process. In addition, a noticeable increase was observed for the dynamics of TN, phosphorous and lignin. In contrast, the C/N, NH4/NO3 and WSC values gradually decreased during the process. Moreover, it was observed that the length of 75 days for the process is an appropriate time for maturation of all treatments. However, the first and second treatments resulted in better outcomes compared with the other types of treatments. From the point of view of quality obtained vermicompost was nitrogen enriched product in all treatments. Whereas, for the phosphorous elements this method is appropriate for the first treatment only.
|
|
Nova |
2016 |
Kundu S, Zanganeh J, Moghtaderi B, 'A review on understanding explosions from methane-air mixture', Journal of Loss Prevention in the Process Industries, 40 507-523 (2016) [C1]
This review examines existing knowledge on the genesis and flame acceleration of explosions from methane-air mixtures. Explosion phases including deflagration and detonation and t... [more]
This review examines existing knowledge on the genesis and flame acceleration of explosions from methane-air mixtures. Explosion phases including deflagration and detonation and the transition from deflagration to detonation have been discussed. The influence of various obstacles and geometries on explosions in an underground mine and duct have been examined. The discussion, presented here, leads the readers to understand the considerations which must be accounted for in order to obviate and/or mitigate any accidental explosion originating from methane-air systems.
|
|
Nova |
2016 |
Luo C, Zanganeh J, Moghtaderi B, 'A 3D numerical study of detonation wave propagation in various angled bending tubes', Fire Safety Journal, 86 53-64 (2016) [C1]
This paper conducts a numerical study of detonation wave propagations in 30 m and 73 m long straight/varying angle bending detonation tubes with inner diameters of 0.5 m and 1.05 ... [more]
This paper conducts a numerical study of detonation wave propagations in 30 m and 73 m long straight/varying angle bending detonation tubes with inner diameters of 0.5 m and 1.05 m, respectively, which are filled with varying stoichiometric methane-air mixtures. In the study a 3D numerical model was established by combining a compressible one-step global reaction hot model with the k-¿ shear-stress transport (SST) turbulent model. In order to resolve the thin detonation wave front, a dynamically refined mesh near the high pressure gradient is adopted. The initial conditions of the model are obtained from the 1D detonation model. The present model was first verified by comparing the numerical results against the published measurements. The pressure distributions and detonation wave speeds across the tubes and bends were then predicted by using this 3D model.
|
|
Nova |
2016 |
Ajrash MJ, Zanganeh J, Moghtaderi B, 'Effects of ignition energy on fire and explosion characteristics of dilute hybrid fuel in ventilation air methane', Journal of Loss Prevention in the Process Industries, 40 207-216 (2016) [C1]
Deflagration explosions of coal dust clouds and flammable gases are a major safety concern in coal mining industry. Accidental fire and explosion caused by coal dust cloud can imp... [more]
Deflagration explosions of coal dust clouds and flammable gases are a major safety concern in coal mining industry. Accidental fire and explosion caused by coal dust cloud can impose substantial losses and damages to people and properties in underground coal mines. Hybrid mixtures of methane and coal dust have the potential to reduce the minimum activation energy of a combustion reaction. In this study the Minimum Explosion Concentration (MEC), Over Pressure Rise (OPR), deflagration index for gas and dust hybrid mixtures (Kst) and explosive region of hybrid fuel mixtures present in Ventilation Air Methane (VAM) were investigated. Experiments were carried out according to the ASTM E1226-12 guideline utilising a 20 L spherical shape apparatus specifically designed for this purpose. Results: obtained from this study have shown that the presence of methane significantly affects explosion characteristics of coal dust clouds. Dilute concentrations of methane, 0.75-1.25%, resulted in coal dust clouds OPR increasing from 0.3 bar to 2.2 bar and boosting the Kst value from 10 bar m s-1 to 25 bar m s-1. The explosion characteristics were also affected by the ignitors' energy; for instance, for a coal dust cloud concentration of 50 g m-3 the OPR recorded was 0.09 bar when a 1 kJ chemical ignitor was used, while, 0.75 bar (OPR) was recorded when a 10 kJ chemical ignitor was used.For the first time, new explosion regions were identified for diluted methane-coal dust cloud mixtures when using 1, 5 and 10 kJ ignitors. Finally, the Le-Chatelier mixing rule was modified to predict the lower explosion limit of methane-coal dust cloud hybrid mixtures considering the energy of the ignitors.
|
|
Nova |
2014 |
Zanganeh J, Moghtaderi B, 'Investigation of flame propagation over an inclined fuel wetted porous bed', Fire Safety Journal, 67 113-120 (2014) [C1]
This experimental study was conducted to investigate the rate of flame spread over an inclined porous solid (sand) wetted with finite quantities of fuel (iso-propanol). The study ... [more]
This experimental study was conducted to investigate the rate of flame spread over an inclined porous solid (sand) wetted with finite quantities of fuel (iso-propanol). The study comprised experiments that were conducted over 15° and 30° inclined beds with depths ranging from 13.3 mm to 39.9 mm and consisting of average sand particle diameters ranging from 0.5 mm to 5 mm under quiescent, assisted and opposed airflow conditions. Analysis of the resulting data indicate that the rate of flame spread is significantly decreased by increasing the bed inclination angle or the airflow velocity and is applicable for both assisted and opposed directions. Furthermore, the rate of flame spread is decreased to the minimum value and actually ceased halfway along the bed with a 30° inclination angle. This behaviour was observed mainly for beds containing coarse sand particles. The rate of flame spread was higher for thinner beds rather coarse beds under any given airflow conditions. Finally, the rate of flame spread in upward direction was relatively quicker in comparison with downward direction counterpart. © 2014 Elsevier Ltd. All rights reserved.
|
|
Nova |
2014 |
Tremain P, Zanganeh J, Hugo L, Curry S, Moghtaderi B, 'Characterization of "Chailings": A Char Created from Coal Tailings', ENERGY & FUELS, 28 7609-7615 (2014) [C1]
|
|
Nova |
2013 |
Shah K, Moghtaderi B, Zanganeh J, Wall T, 'Integration options for novel chemical looping air separation (ICLAS) process for oxygen production in oxy-fuel coal fired power plants', FUEL, 107 356-370 (2013) [C1]
|
|
Nova |
2013 |
Zanganeh J, Moghtaderi B, 'Experimental and mathematical analysis of fuel penetration through unconsolidated porous media', FIRE AND MATERIALS, 37 160-170 (2013) [C1]
|
|
Nova |
2013 |
Zanganeh J, Moghtaderi B, Ishida H, 'Combustion and flame spread on fuel-soaked porous solids', Progress in Energy and Combustion Science, 39 320-339 (2013) [C1]
Fires caused by accidental spillage of flammable liquids have been a major safety concern in industries and urban areas. There has been a recent surge of interest in the research ... [more]
Fires caused by accidental spillage of flammable liquids have been a major safety concern in industries and urban areas. There has been a recent surge of interest in the research concerning the combustion and flame spread over an inert porous media soaked with flammable liquid. This interest has been driven by the need to better understand fire and its behaviour under these conditions and improve the relevant fire safety and prevention technologies. A review of key studies in this subject area has been conducted and summarised, focussing mainly on the theory plus a notable experimental findings about combustion and the flame spread phenomena of fuel-soaked porous media. The review covers topics such as flame spread behaviour, physical flame propagation aspects, heat transfer, temperature distribution; and fuel consumption over inert porous media. The review concludes with some practical safety and environmental considerations for decontamination of land soaked with flammable liquid. © 2013 Elsevier Ltd. All rights reserved.
|
|
Nova |
2013 |
Zanganeh J, Moghtaderi B, 'Effect of fuel soaked time and fuel ratio on the flame spread rate over a porous bed wetted with liquid fuel', Fire Safety Journal, 59 151-159 (2013) [C1]
An experimental investigation was conducted to explore the rate of flame spread over an unconsolidated porous bed of sand wetted with 2-propanol under a range of operating conditi... [more]
An experimental investigation was conducted to explore the rate of flame spread over an unconsolidated porous bed of sand wetted with 2-propanol under a range of operating conditions. Video cinematography was employed to determine the rate of flame spread and characterise the combustion behaviour of the system. The rate of flame spread strongly correlated with: (i) the ratio of fuel volume to the weight of the sand bed, referred to as FR, and (ii) the flame initiation delay, referred to as FID. The rates of flame spread associated with no initiation delay cases were found to rise with increasing FR while for cases associated with any given flame initiation delay the rate of flame spread was found to decrease with increasing FR. In addition, the rate of change in flame spread was observed to be different for beds containing finer particles in comparison to those containing coarser ones. © 2013 Elsevier Ltd.
|
|
Nova |
2013 |
Zanganeh J, Altarawneh M, Saraireh I, Namazi S, Zanganeh J, 'Theoretical study on thermochemical parameters and pKa values for fluorinated isomers of toluene', COMPUTATIONAL AND THEORETICAL CHEMISTRY, 1011 21-29 (2013) [C1]
|
|
Nova |
2012 |
Moghtaderi B, Zanganeh J, Shah KV, Wu H, 'Application of concrete and demolition waste as CO2 sorbent in chemical looping gasification of biomass', Energy & Fuels, 26 2046-2057 (2012) [C1]
|
|
Nova |
2011 |
Zanganeh J, Moghtaderi B, 'Flame spread over porous sand beds wetted with propenol', Fire and Materials, 35 61-70 (2011) [C1]
|
|
Nova |
2010 |
Zanganeh J, Moghtaderi B, 'Experimental study of temperature distribution and flame spread over an inert porous bed wetted with liquid fuel', International Journal of Emerging Multidisciplinary Fluid Sciences, 2 1-14 (2010) [C1]
|
|
Nova |