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Desulfurization kinetics and mineral phase evolution of ...

Jun 10, 2015  The desulfurization kinetics and mineral phase evolution from bauxite water slurry (BWS) electrolysis were examined. The results showed that the desulfurization ratio in NaCl system increased with current density, and reached up to 96% at 0.22 A/cm 2.In contrast, the desulfurization ratio in NaOH system increased firstly, and then decreased with current density, which was relative to

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Desulfurization kinetics and mineral phase evolution of ...

The desulfurization kinetics and mineral phase evolution from bauxite water slurry (BWS) electrolysis were examined. The results showed that the desulfurization ratio in NaCl system increased with current density, and reached up to 96% at 0.22 A/cm 2.In contrast, the desulfurization ratio in NaOH system increased firstly, and then decreased with current density, which was relative to the ...

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desulfurization kinetics and mineral phase evolution of

The desulfurization kinetics and mineral phase evolution from bauxite water slurry (BWS) electrolysis were examined. The results showed that the desulfurization ratio in NaCl system increased with current density, and reached up to 96% at 0.22 A/cm(2).

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Desulfurization kinetics and mineral phase evolution of ...

The desulfurization kinetics and mineral phase evolution from bauxite water slurry (BWS) electrolysis were examined. The results showed that the desulfurization ratio in NaCl system increased with current density, and reached up to 96% at 0.22A/cm 2 . In contrast, the desulfurization ratio in NaOH system increased firstly, and then decreased with current density, which was relative to the ...

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10.1016/j.minpro.2015.04.010 DeepDyve

Jun 11, 2020  When BWS concentration was more than 150 g/L, the carphosiderite (Fe 3 (SO 4 ) 2 (OH) 5 H 2 O) was found in bauxite after electrolysis.• The desulfurization kinetics was well described by the unreacted shrinking core model, and desulfurization reaction was controlled by internal diffusion in NaCl system, while, for NaOH system, the rate ...

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Kinetics and Mechanism of Plasma Oxidative Desulfurization ...

Nov 18, 2000  Factors affecting the plasma oxidative desulfurization of organic sulfides in the liquid phase were investigated. The organic sulfides, including mercaptan, thioether, and thiophene, are mixed with n-heptane severally or jointly. The plasma power load, i.e., the ratio of oxygen flow to plasma power, and the reaction time are the primary factors affecting the desulfurization reaction when the ...

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Desulfurization Process and Kinetics of Fe/Activated ...

Jul 24, 2020  The desulfurizer before and after desulfurization was characterized by XRD, XPS, SEM and N 2 adsorption–desorption. The results show that the active component of desulfurizer is Fe 2 O 3, which reacts with H 2 S to form FeS, elemental sulfur and Fe 2 (SO 4) 3. The sulfide block the pores, causing the specific surface area, pore volume and ...

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Suspension calcination and alkali leaching of low-grade ...

May 12, 2020  Up to10%cash back  The desulfurization and desilication properties and mineralogical evolution were studied by X-ray diffraction, thermogravimetry-differential thermal analysis, scanning electron microscopy, and FactSage methods.

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desulfurization mineral newsLínea de Producción Oro CIP ...

The chemical composition, mineral composition and physical properties of limestone are in large change In limestone wet flue gas desulfurization, limestone purity are generally expressed as calcium carbonate, limestone impurities will cause wearing to large scale vertical mill, increase the energy consumption of the mill, thereby reducing the purity of limestone

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Stone Crushing Machine - Amravati mineral processing line ...

Amravati mineral processing line processing power plant desulfurization. Stone Crushing Machine - We provide customers with a variety of good quality construction and mining crushing equipment, and optimize the combination of various types of equipment to meet different process needs.

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Desulfurization kinetics of molten copper by gas bubbling ...

Molten copper with 0.74 wt pct sulfur content was desulfurized at 1523 K by bubbling Ar-O2 gas through a submerged nozzle. The reaction rate was significantly influenced not only by the oxygen partial pressure but also by the gas flow rate. Little evolution of SO2 gas was observed in the initial 10 seconds of the oxidation; however, this was followed by a period of high evolution rate of SO2 gas.

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Aluminum-Free Steelmaking: Desulfurization and

Jul 21, 2021  desulfurization, the silica activity in the slag must be low when using Si as deoxidant. ... showed repeatability in characterizing steel–slag reaction kinetics and nonmetallic inclusion evolution [5,14–20]. From previous experiments, the concentration of dissolved oxygen in ... 2 phase diagram (isothermal section at 1600 °C) as plotted ...

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Intensified hydrogen production and desulfurization at ...

Desulfurization kinetics and mineral phase evolution of bauxite water slurry (BWS) electrolysis X. Gong , Siyuan Zhuang , Lan-ping Ge , Z. Wang , M. Wang Chemistry

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Study of Modified Dry Desulfurization Ash in a Power Plant ...

To improve the CO₂ fixation ability of dry desulfurization ash (DDA), a DDA must be modified by chemical methods. At the micron level, the changes in microstructure and chemical composition before and after DDA modification were analysed by Scanning Electron Microscope (SEM) and Energy Dispersive Spectroscopy (EDS), and the reaction mechanism of the modification process was inferred.

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Novel application for palygorskite clay mineral: a kinetic ...

Jul 11, 2019  Palygorskite (Pal) is a low-cost clay mineral material and was investigated in this study as a novel material for adsorptive desulfurization of petroleum refining fractions from the Clara Camarão Potiguar Refinery (RPCC) in Brazil. This clay mineral was characterized by X-ray fluorescence, X-ray photoelectron spectroscopy, X-ray diffraction, Fourier transform infrared spectroscopy, scanning ...

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Aluminum-Free Steelmaking: Desulfurization and Nonmetallic ...

In some applications, deep desulfurization and deoxidation of steels without the use of aluminum are required, using Si as a deoxidant instead, with double-saturated slags in the CaO-SiO2-CaF2-MgO system. This work studied the desulfurization and nonmetallic inclusion evolution for the system using an induction furnace and compared the results with FactSage kinetic simulations.

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Crystal growth kinetics as an architectural constraint on ...

Oct 08, 2019  Furthermore, we show that the fabrication of these biocomposites is controlled by the organisms by regulating the growth kinetics of the mineral phase, which is suggested to be key in determining the morphospace of possible shell ultrastructures and, therefore, acts as an architectural constraint on the evolution of molluscan shells.

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Desulfuration of electrolyzed coal water slurry in HCl ...

Desulfurization kinetics and mineral phase evolution of bauxite water slurry (BWS) electrolysis X. Gong , Siyuan Zhuang , Lan-ping Ge , Z. Wang , M. Wang Chemistry

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Evolution of Sulfur Compounds and Hydrocarbons Classes in ...

A straight run gas oil has been hydrotreated with a commercial CoMo/Al2O3 catalyst, under variable conditions of severity, in order to yield processed products containing a variable amount of residual sulfur. These products have been characterized by simulated distillation, gas chromatography with sulfur-selective detection (GC−SCD), and thin-layer chromatography. The sulfur compounds have ...

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Application of a square wave potentiometry technique for ...

Sep 28, 2016  Gong X, Zhuang S, Ge L, Wang Z, Wang M (2015) Desulfurization kinetics and mineral phase evolution of bauxite water slurry (BWS) electrolysis. Int J Miner Process 139:17–24. CAS Article Google Scholar Hernandez-Maldonado AJ, Yang RT (2004) Desulfurization of transportation fuels by adsorption.

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Kinetic and stoichiometric characterization of anoxic ...

Apr 06, 2014  Sulfide inhibition on desulfurization has already been reported (Cardoso et al. 2006; Gonzalez-Sanchez et al. 2009; Reyes-Avila et al. 2004), but there is a lack of knowledge on kinetic inhibition parameters; hence, further investigation is necessary. In this study, the inhibition kinetics caused by the presence of these compounds was modeled ...

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Thermal desulfurization of pyrite: An in situ high-T ...

Jun 04, 2019  Kinetics of pyrite desulfurization. To characterize the kinetics of pyrite desulfurization, we conducted a series of DTA–TGA experiments from room temperature up to 1073 K with heating rates, ϕ, of 5, 10, 20, and 40 K/min under an argon atmosphere [Figs. 6(a)–6(c)]. Note that compared with the neutron diffraction experiments described ...

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CFD Modeling of Slag-Metal Reactions and Sulfur Refining ...

Feb 08, 2017  A CFD model capable of simulating multiphase flow with bulk and free surface turbulence phenomena and desulfurization behavior in the gas-stirred ladle has been developed. The fluid flow behavior shows that slag and metal try to entrap each other, forming a two-phase mixing zone.

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A Mathematical Model for the Multiphase Transport and ...

Dec 15, 2017  A Mathematical Model for the Multiphase Transport and Reaction Kinetics in a Ladle with Bottom Powder Injection

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desulfurizationprocess mineral

The desulfurization kinetics and mineral phase evolution from bauxite water slurry (BWS) electrolysis were examined. The results showed that the desulfurization ratio ...

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Kinetics and mechanism of desulfurization and ...

OSTI.GOV Technical Report: Kinetics and mechanism of desulfurization and denitrogenation of coal-derived liquids

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Desulfurization Kinetics Of Molten Copper Matte By Gas ...

The desulfurization rate and evolution rate of S02 gas of copper matte were described by the mass transfer rate through the gas film around the rising gas bubbles. Thermodynamic correlation equations between the partial pressure of gaseous species and matte composition were incorporated to the kinetic

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Stone Crushing Machine - Michigan mineral processing line ...

Desulfurization kinetics and mineral phase evolution of . The desulfurization kinetics and mineral phase evolution from bauxite water slurry BWS electrolysis were examined The results showed that the desulfurization ratio in NaCl system increased with current density and reached up to 96 at 022 Acm contrast the desulfurization ratio in NaOH system increased firstly and then decreased with ...

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Thermal desulfurization of pyrite: An in situ high-T ...

Jun 04, 2019  Kinetics of pyrite desulfurization. To characterize the kinetics of pyrite desulfurization, we conducted a series of DTA–TGA experiments from room temperature up to 1073 K with heating rates, ϕ, of 5, 10, 20, and 40 K/min under an argon atmosphere [Figs. 6(a)–6(c)]. Note that compared with the neutron diffraction experiments described ...

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Evolution of Sulfur Compounds and Hydrocarbons Classes in ...

A straight run gas oil has been hydrotreated with a commercial CoMo/Al2O3 catalyst, under variable conditions of severity, in order to yield processed products containing a variable amount of residual sulfur. These products have been characterized by simulated distillation, gas chromatography with sulfur-selective detection (GC−SCD), and thin-layer chromatography. The sulfur compounds have ...

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A Review of Modeling Hot Metal Desulfurization - Visuri ...

Jin et al. 77 proposed a kinetic model for desulfurization with powder injection. The desulfurization was assumed to take place via permanent and transitory reactions, i.e., via the top slag and the reagent powder. The transitory metal–reagent reaction was assumed to be controlled by mass transport of sulfur in the metal phase.

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Kinetics and Phase Evolution During Carbothermal Synthesis ...

Jan 01, 1997  The kinetics and phase evolution of the TiC formation process by carbothermal reduction of carbon coated titania (TiO 2) (surface area of 64 m 2 /g) and TiO 2 /carbon black (surface area of 220 m 2 /g) mixture were studied using TGA, XRD, and chemical analysis (oxygen and total carbon content). A higher reactivity of the carbon coated titania precursor as compared to the

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desulfurization mineral newsLínea de Producción Oro CIP ...

The chemical composition, mineral composition and physical properties of limestone are in large change In limestone wet flue gas desulfurization, limestone purity are generally expressed as calcium carbonate, limestone impurities will cause wearing to large scale vertical mill, increase the energy consumption of the mill, thereby reducing the purity of limestone

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Kinetics and Nucleation (Chapter 8) - Evolution of Phase ...

Evolution of Phase Transitions - May 2006. We use cookies to distinguish you from other users and to provide you with a better experience on our websites.

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Kinetically driven successive sodic and potassic ...

Jul 21, 2021  Interfacial fluids at fluid–mineral boundaries control reaction kinetics and mineral stability, and hence the complex feedback between fluid flow, reaction progress, and reaction-induced ...

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Kinetics of Mn-based sorbents for hot coal gas ...

Hot gas desulfurization may be accomplished by using solid sorbents such as oxides of those metals that form stable sulfides. The effectiveness of a desulfurizing agent in treating such gases is related to the predicted equilibrium partial pressure of hydrogen sulfide which will be present in a phase combination of the reduced form of sulfide and oxide phases.

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A Mathematical Model for the Multiphase Transport and ...

Dec 15, 2017  A Mathematical Model for the Multiphase Transport and Reaction Kinetics in a Ladle with Bottom Powder Injection

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Kinetic Studies on the Pyrolysis, Desulfurization ...

----- table of contents page introduction 1 the experimental apparatus 3 the interpreta tion of non -isothermal kinetic experiments 4 example of ch3sh from coal 11 hzs evolution in reactions characteristic of coal desulfuriza tion 14 iron pyrite 15 organic sulfur ] 7 kinetics of hzs evolution from ten coals 25 identification and astm analyses of ten coals 28 dependence of desulfuriza tion ...

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