(PDF) Effect of support on reactivity and selectivity of
Thermal treatment of c- Al2O3 at 1150 °C produced the phase transformation to a-Al2O3. Ni-based oxygen carriers prepared on a-Al2O3 MgAl2O4 or CaAl2O4 as support showed very high reactivity and high methane combustion selectivity to CO2 and H2O because the interaction between the NiO and the support was decreased.
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Publications Mysite
31. Thermodynamic designing of heat treatable Mg-Zn-X (Sn Y) alloy suitable for semi-solid processing. K. R. Ravi Transaction of Indian Institute of Metals 2015 68 (6) (Impact Factor 1.176) 30. Synthesis of Al-MgAl2O4 master alloy and their grain refinement studies in pure
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Chemical EngineeringResearch Projects
2014. Synthesis of selective nano-Al-SiC sorbent and application for solid-liquid equilibrium for Cadmium in phosphoric acid. Ali Al Matar. 2014. Functionalization of MOFs for Enhancing CO2 Capture. Mohammed Saleh Ba-Shammakh. 2016. Development of Novel Catalyst for Selective Removal of H2S from Natural Gas Stream.
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Oxidation Behavior of Silicon CarbideResearchGate
The literature suggests that MgAl2O4 can accelerate SiC oxidation in Al2O3–MgAl2O4–SiC–C refractory castables. Thus in this work thermodynamic calculations have been carried out using
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Publications Mysite
31. Thermodynamic designing of heat treatable Mg-Zn-X (Sn Y) alloy suitable for semi-solid processing. K. R. Ravi Transaction of Indian Institute of Metals 2015 68 (6) (Impact Factor 1.176) 30. Synthesis of Al-MgAl2O4 master alloy and their grain refinement studies in pure
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Characterization and evaluation of interface in SiC p
May 01 2015 · 35 SiC p /2024 Al (volume fraction) composite was prepared by powder metallurgy method. The microstructures of SiC p /Al interfaces and precipitate phase/Al interfaces were characterized by HRTEM and the interface conditions were evaluated by tensile modules of elasticity and Brinell hardness measurement. The results show that the overall SiC p /Al interface condition in this
Get PriceThe Mullite‐Corundum Boundary in the Systems MgO‐Al2O3
Akihiko Otsuka Yoshikazu Matsumura Kazuya Hosono Ryohei Tanaka Long term oxidation of a SiC fiber-bonded composite in air at 1500 °C Journal of the European Ceramic Society 10.1016/S(03)00116-X 23 16 () (2003).
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Oxidation Behavior of Silicon CarbideERVIN1958
The oxidation of purified green silicon carbide in controlled atmospheres was studied by weight‐gain measurement and by observation of the surface reaction products including optical measurement of the thickness of the oxide surface film. Thermodynamic evaluation of SiC oxidation in Al2O3–MgAl2O4–SiC–C refractory castables
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(PDF) Thermodynamic and experimental study of combined
This thermodynamic study carried out between 200 and 700 C indicates that the combined DRM and SRM reaction is Fig. 2 e Combined DRM-SRM Effect of H2O addition on (A) a complex multireaction network where various reactions YH2 (B) YCO and (C) H2/CO ratio in the thermodynamic occur simultaneously (DRM SRM WGS RWGS) some of them
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Thermodynamic evaluation of SiC oxidation in Al 2O 3–MgAl
Request PDF Thermodynamic evaluation of SiC oxidation in Al 2O 3–MgAl 2O 4–SiC–C refractory castables The literature suggests that MgAl2O4 can accelerate SiC oxidation in Al2O3–MgAl2O4
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Stability of MgAl2O4 at 1400°C as Derived from Equilibrium
In-Ho Jung Sergei A. Decterov Arthur D. Pelton Critical thermodynamic evaluation and optimization of the MgO-Al2O3 CaO-MgO-Al2O3 and MgO-Al2O3-SiO2 Systems Journal of Phase Equilibria and Diffusion 10.1007/s 25 4 () (2004).
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The effect of microsilica on the oxidation resistance of
Jan 01 2016 · The effects of microsilica addition (1.0 wt 1.5 wt 2 wt 2.5 wt and 3 wt ) on oxidation behavior of Al 2 O 3 –SiC–SiO 2 –C castables containing Si and B 4 C additives were studied in this work. The phases and microstructures of different layers of the samples after oxidation tests coked at various temperatures were investigated by means of thermodynamic analysis X-ray
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Oxidation Behavior of Silicon CarbideERVIN1958
The oxidation of purified green silicon carbide in controlled atmospheres was studied by weight‐gain measurement and by observation of the surface reaction products including optical measurement of the thickness of the oxide surface film. Thermodynamic evaluation of SiC oxidation in Al2O3–MgAl2O4–SiC–C refractory castables
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Yasuo Uchiyama Scientific.Net
Journal of Biomimetics Biomaterials and Biomedical Engineering Materials Science. Defect and Diffusion Forum
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Thermodynamics and Kinetics of the Formation of Al2O3
The formation of Al2O3 MgAl2O4 and MgO has been widely studied in different Al base metal matrix composites but the studies on thermodynamic aspects of the Al2O3/ MgAl2O4/MgO phase equilibria
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Influence of the Characteristics of Spinels on the Slag
Abstract. The XRD patterns at ambient temperature and at 1500°C showed that the spinel in the Al 2 O 3 –MgO castables fired at 1500°C for 3 h has the higher peak intensity compared to those in Al 2 O 3 –spinel castables the interplanar distance in the set (311) is 2.43 Å for the spinel in Al 2 O 3 –MgO castables as well as the spinels in Al 2 O 3 –spinel castables using spinels
Get PriceInfluence of the Characteristics of Spinels on the Slag
Abstract. The XRD patterns at ambient temperature and at 1500°C showed that the spinel in the Al 2 O 3 –MgO castables fired at 1500°C for 3 h has the higher peak intensity compared to those in Al 2 O 3 –spinel castables the interplanar distance in the set (311) is 2.43 Å for the spinel in Al 2 O 3 –MgO castables as well as the spinels in Al 2 O 3 –spinel castables using spinels
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Thermodynamic Evaluation and Optimization of the Al2O3
Jun 29 2011 · Guillaume Lambotte Patrice Chartrand A Thermodynamic Approach to the Corrosion of the Cathode Refractory Lining in Aluminium Electrolysis Cell Modelling of the Al2O3-Na2O-SiO2-AlF3-NaF-SiF4 System Light Metals 2013 10.1007/_155 () (2016).
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Publication Morita Lab.
"Evaluation of Phase Diagrams for the Al2O3-CaO-SrO System by In-Situ Observation Using Confocal Laser Microscope" A.S.Sunkar and K.Morita AIST Transactions Iron and Steel Technology 6(2009) No.2 "Thermodynamic Properrties of Liquid Fe-B and Fe-B-C Alloys" S.J.Tae and K.Morita ISIJ International 48(2008)
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Interdiffusion in the System MgO‐MgAl2O4II1971
Gunnar Eriksson Ping Wu Arthur D. Pelton Critical evaluation and optimization of the thermodynamic properties and phase diagrams of the MgO Al2O3 MnO Al2O3 FeO Al2O3 Na2O Al2O3 and K2O A12O3 systems Calphad 10.1016/(93) 17 2 () (1993).
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Synthesis and Characterization of Nickel Aluminate Spinel
The aim of this study was to synthesis and characterization of nickel aluminate spinel (NiAl2O4) prepared of the equilibrium mixture of Al2O3 and NiO. The materials were produced by the solid phase synthesis. In the experiments the following powders were used α-Al2O3 TM-DAR from Taimei Chemicals (Japan) of an average particle size 133 nm and density 3.96g/cm3 and NiO powder from Sigma
Get PriceInfluence of the Characteristics of Spinels on the Slag
Abstract. The XRD patterns at ambient temperature and at 1500°C showed that the spinel in the Al 2 O 3 –MgO castables fired at 1500°C for 3 h has the higher peak intensity compared to those in Al 2 O 3 –spinel castables the interplanar distance in the set (311) is 2.43 Å for the spinel in Al 2 O 3 –MgO castables as well as the spinels in Al 2 O 3 –spinel castables using spinels
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REVIEW—Graphical Displays of the Thermodynamics of High
William G. Fahrenholtz Thermodynamic Analysis of ZrB2–SiC Oxidation Formation of a SiC‐Depleted Region Journal of the American Ceramic Society 90 1 () (2006). Wiley Online Library
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Copper in Chemical-Looping Combustion (CLC) and Chemical
Oct 06 2017 · The chemical-looping combustion (CLC) and chemical-looping with oxygen uncoupling (CLOU) processes are attractive solutions for efficient combustion with inherent separation of carbon dioxide. These processes use a metal oxide as an oxygen carrier to transfer oxygen from an air to a fuel reactor where the fuel or gasification products of the fuel reacts with the oxygen carrier.
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Publication Morita Lab.
"Evaluation of Phase Diagrams for the Al2O3-CaO-SrO System by In-Situ Observation Using Confocal Laser Microscope" A.S.Sunkar and K.Morita AIST Transactions Iron and Steel Technology 6(2009) No.2 "Thermodynamic Properrties of Liquid Fe-B and Fe-B-C Alloys" S.J.Tae and K.Morita ISIJ International 48(2008)
Get PriceThermodynamic Assessment of the System MgO–Al2O3
Three-phase ceramic composites constituted from equal volume fractions of α-Al2O3 MgAl2O4 spinel and cubic 8 mol Y2O3-stabilized ZrO2 (8YSZ) were flash-sintered under the influence of DC
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Influence of Additives on Slag Resistance of Al2O3‐SiO2
Jan 20 2005 · The microstructures of Al 2 O 3 –SiO 2 –SiC–C refractory matrices with aluminum silicon Si 3 N 4 BN B 2 O 3 and B 4 C additives are characterized before and after a crucible slag test and the phases present are compared to those expected at thermodynamic equilibrium. The carbon content dominates the resistance to CaO–MgO–Al 2 O 3 –SiO 2 slag penetration while the viscosity
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Phase Relations in Si-Al-Y-O-C Systems
The present work investigated the phase relations in SiC-Al2O3-Y2O3-SiO2 (Si-Al-Y-O-C) system. As a continuation of our previous works the purpose of this study is to understand the high temperature reaction behaviors of SiO2 in the system and its effect on the phase relations of the valuable system of SiC-Al2O3-Y2O3. The phase compositions of six solid-state reacted samples with different
Get PriceThe assessment of thermodynamic parameters in the Al2O3
Thermodynamic parameters for solid and liquid phases in the Al 2 O 3 ‐Y 2 O 3 system are assessed using new calorimetric measurement for the YAG (Y 3 Al 5 O 12) YAP (YAlO 3) and YAM (Y 4 Al 2 O 9) phases.The calculated phase diagram of the Al 2 O 3 ‐Y 2 O 3 system is in reasonable agreement with experimental data. According to the calculations the YAP phase melts congruently and is
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