The Experts below are selected from a list of 297 Experts worldwide ranked by ideXlab platform
Xinmiao Liang - One of the best experts on this subject based on the ideXlab platform.
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Iron Chloride 4 acetamido tempo sodium nitrite catalyzed aerobic oxidation of primary alcohols to the aldehydes
Advanced Synthesis & Catalysis, 2010Co-Authors: Qiongqiong Lu, Xinmiao LiangAbstract:A variety of 4-substituted 2,2,6,6-tetramethylpiperidyl-1-oxy (TEMPO) derivatives has been screened for their ability in the oxidation of primary alcohols to the aldehydes with dioxygen under mild conditions. An evaluation of the efficiency of these 4-substituted TEMPO derivatives in the alcohol oxidation may allow an insight into the effect of the structural variations of TEMPO on the oxidation of alcohols, which should facilitate catalyst design and screening efforts. Based on the screening results of 4-substituted TEMPO derivatives, the catalyst comprised of 4-acetamido-TEMPO, Iron Chloride and sodium nitrite, has been developed for the highly efficient oxidation of a wide range of primary alcohols including primary aliphatic alcohols to the corresponding aldehydes under mild conditions.
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Iron Chloride/4‐Acetamido‐TEMPO/Sodium Nitrite‐Catalyzed Aerobic Oxidation of Primary Alcohols to the Aldehydes
Advanced Synthesis & Catalysis, 2010Co-Authors: Weili Yin, Xinmiao Liang, Changhu Chu, Jianwei Tao, Renhua LiuAbstract:A variety of 4-substituted 2,2,6,6-tetramethylpiperidyl-1-oxy (TEMPO) derivatives has been screened for their ability in the oxidation of primary alcohols to the aldehydes with dioxygen under mild conditions. An evaluation of the efficiency of these 4-substituted TEMPO derivatives in the alcohol oxidation may allow an insight into the effect of the structural variations of TEMPO on the oxidation of alcohols, which should facilitate catalyst design and screening efforts. Based on the screening results of 4-substituted TEMPO derivatives, the catalyst comprised of 4-acetamido-TEMPO, Iron Chloride and sodium nitrite, has been developed for the highly efficient oxidation of a wide range of primary alcohols including primary aliphatic alcohols to the corresponding aldehydes under mild conditions.
Frank Bärhold - One of the best experts on this subject based on the ideXlab platform.
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Spray roasting of Iron Chloride FeCl2: Numerical modelling of industrial scale reactors
Powder Technology, 2013Co-Authors: Martin Schiemann, Siegmar Wirtz, Viktor Scherer, Frank BärholdAbstract:Abstract Iron Chloride solutions are a waste product in steel pickling plants. A technique to recover the spent solutions is a spray roasting process, where the spent solution is sprayed into a hot reaction atmosphere and solid Iron oxide particles are formed. The particle history in spray roasting reactors has an important influence on the efficiency of the recovery process and on the quality of the by-product Fe2O3. The Iron oxide underlays strong quality demands for further processing. The particle quality is influenced by the plant design and operation parameters. To investigate the influence of those properties on the Iron oxide produced in the spray roasting process, a model for CFD simulations has been developed. It describes the particle formation and chemical reaction of the Iron Chloride solution in the spray roasting reactor in a simplified way suitable for CFD simulations. Simulations of two different industrial reactor configurations show the capability of the model to predict the influence of geometric variations on the composition of the resulting Iron oxide.
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Spray roasting of Iron Chloride FeCl2: laboratory scale experiments and a model for numerical simulation
Powder Technology, 2012Co-Authors: Martin Schiemann, Siegmar Wirtz, Viktor Scherer, Frank BärholdAbstract:Abstract Iron Chloride solutions are a waste product in steel pickling plants. A technique to recover the spent solutions is the so-called spray roasting process, where the spent solution is sprayed into a hot reaction atmosphere and solid Iron oxide particles are formed. The particle formation in spray roasting reactors has important influence on the efficiency of the recovery process and on the quality of the desired by-product Fe2O3. A laboratory reactor was designed to investigate the particle formation. Experiments were carried out covering the predominant conditions in spray roasting reactors. The results offer valuable insight into the particle formation process, providing data on the surface structure of the Fe2O3 particles formed and on the progress of chemical conversion. Based on these results, a simplified model applicable to CFD-modelling of spray roasting reactors has been developed. Simulations of particle trajectories in the laboratory reactor are presented to show the capabilities of the model.
Alan C. West - One of the best experts on this subject based on the ideXlab platform.
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modeling of reaction kinetics and transport in the positive porous electrode in a sodium Iron Chloride battery
Journal of Power Sources, 2012Co-Authors: Damla Eroglu, Alan C. WestAbstract:Abstract A one-dimensional mathematical model of the positive electrode of a sodium–Iron Chloride battery for an isothermal, constant-current discharge–charge cycle is presented. Macroscopic theory of porous electrodes and concentrated solution theory are used in the model to describe the transport processes. The change in the solubility of FeCl 2 with position and time within the cell is included in the model by defining an equilibrium constant that is a function of the NaCl:NaAlCl 4 molar ratio. The concentrated solution theory for a three-ion system with common cation is extended to account for a diffusive flux of a sparingly soluble ferrous complex. It is seen that this flux is important, especially at moderate depths of discharge. The effect of the assumed solubility constant K sp,FeCl on the battery performance is characterized. When K sp,FeCl is higher than 10 6 , its variation does not change the short-time behavior of the system appreciably. Simulations suggest that the Iron accumulates near the sodium tetrachloroaluminate reservoir during discharge. When charging, the net movement is reversed. As a result of continuous cycling, simulations predict that Iron is depleted at this boundary. For instance, at the end of the fifth cycle, the Iron amount decreases by ∼1% near the reservoir.
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Modeling of reaction kinetics and transport in the positive porous electrode in a sodium–Iron Chloride battery
Journal of Power Sources, 2012Co-Authors: Damla Eroglu, Alan C. WestAbstract:Abstract A one-dimensional mathematical model of the positive electrode of a sodium–Iron Chloride battery for an isothermal, constant-current discharge–charge cycle is presented. Macroscopic theory of porous electrodes and concentrated solution theory are used in the model to describe the transport processes. The change in the solubility of FeCl 2 with position and time within the cell is included in the model by defining an equilibrium constant that is a function of the NaCl:NaAlCl 4 molar ratio. The concentrated solution theory for a three-ion system with common cation is extended to account for a diffusive flux of a sparingly soluble ferrous complex. It is seen that this flux is important, especially at moderate depths of discharge. The effect of the assumed solubility constant K sp,FeCl on the battery performance is characterized. When K sp,FeCl is higher than 10 6 , its variation does not change the short-time behavior of the system appreciably. Simulations suggest that the Iron accumulates near the sodium tetrachloroaluminate reservoir during discharge. When charging, the net movement is reversed. As a result of continuous cycling, simulations predict that Iron is depleted at this boundary. For instance, at the end of the fifth cycle, the Iron amount decreases by ∼1% near the reservoir.
P A Kohl - One of the best experts on this subject based on the ideXlab platform.
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A Novel Electrolyte for the Sodium/Iron Chloride Battery
Journal of The Electrochemical Society, 1991Co-Authors: C. ‐l. Yu, Jack Winnick, P A KohlAbstract:In this study, a low melting temperature organic chloroaluminate salt was mixed with AlCl 3 -NaCl to form a low melting temperature mixture. The organic chloroaluminate salt utilized was a mixture of AlCl 3 and 1-methyl-3-ethylimidazolium Chloride (MEICl), resulting in AlCl 3 -MEICl. The electrolyte for this investigation is a combination of AlCl 3 -NaCl and AlCl 3 -MEICl salts, resulting in the ternary AlCl 3 -MEICl-NaCl system
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a novel electrolyte for the sodium Iron Chloride battery
Journal of The Electrochemical Society, 1991Co-Authors: C.l. Yu, Jack Winnick, P A KohlAbstract:In this study, a low melting temperature organic chloroaluminate salt was mixed with AlCl 3 -NaCl to form a low melting temperature mixture. The organic chloroaluminate salt utilized was a mixture of AlCl 3 and 1-methyl-3-ethylimidazolium Chloride (MEICl), resulting in AlCl 3 -MEICl. The electrolyte for this investigation is a combination of AlCl 3 -NaCl and AlCl 3 -MEICl salts, resulting in the ternary AlCl 3 -MEICl-NaCl system
Renhua Liu - One of the best experts on this subject based on the ideXlab platform.
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Iron Chloride/4‐Acetamido‐TEMPO/Sodium Nitrite‐Catalyzed Aerobic Oxidation of Primary Alcohols to the Aldehydes
Advanced Synthesis & Catalysis, 2010Co-Authors: Weili Yin, Xinmiao Liang, Changhu Chu, Jianwei Tao, Renhua LiuAbstract:A variety of 4-substituted 2,2,6,6-tetramethylpiperidyl-1-oxy (TEMPO) derivatives has been screened for their ability in the oxidation of primary alcohols to the aldehydes with dioxygen under mild conditions. An evaluation of the efficiency of these 4-substituted TEMPO derivatives in the alcohol oxidation may allow an insight into the effect of the structural variations of TEMPO on the oxidation of alcohols, which should facilitate catalyst design and screening efforts. Based on the screening results of 4-substituted TEMPO derivatives, the catalyst comprised of 4-acetamido-TEMPO, Iron Chloride and sodium nitrite, has been developed for the highly efficient oxidation of a wide range of primary alcohols including primary aliphatic alcohols to the corresponding aldehydes under mild conditions.
