The Experts below are selected from a list of 13089 Experts worldwide ranked by ideXlab platform

C R Bowen - One of the best experts on this subject based on the ideXlab platform.

  • Thermodynamic predictions for the manufacture of Ti2AlC MAX-phase ceramic by Combustion synthesis
    Journal of Alloys and Compounds, 2014
    Co-Authors: T. Thomas, C R Bowen
    Abstract:

    Abstract This paper presents an analysis of the SHS reaction for the manufacture of Ti 2 AlC MAX phase materials using self-propagating high-Temperature synthesis (SHS). Enthalpy-Temperature calculations are presented for the reaction 2Ti + (1 +  y )Al + C → Ti 2 AlC +  y Al. The analysis and data presented allows the determination of the adiabatic Combustion Temperature as a function of a variety of conditions including (i) reactant pre-heating to increase the Combustion Temperature or (ii) the addition of excess aluminium as a diluent to reduce the Combustion Temperature. As excess Al is added as a diluent, there is a decrease in T ad but it offers the potential to control the exothermicity of the SHS process and to form metal–ceramic composites. The range of criteria used for the determination of the appropriate Combustion condition for SHS, such as T ad  ⩾ 1800 K and - Δ H r 298 K / C p 298 K ≥ 2000 K , are shown to be applicable for Ti 2 AlC MAX phase ceramics. The data presented is of use to those considering the manufacture of novel MAX phase ceramics by SHS.

  • Thermodynamic predictions for the manufacture of Ti2AlC MAX-phase ceramic by Combustion synthesis
    Journal of Alloys and Compounds, 2014
    Co-Authors: T. Thomas, C R Bowen
    Abstract:

    This paper presents an analysis of the SHS reaction for the manufacture of Ti2AlC MAX phase materials using self-propagating high-Temperature synthesis (SHS). Enthalpy-Temperature calculations are presented for the reaction 2Ti + (1 + y)Al + C → Ti2AlC + yAl. The analysis and data presented allows the determination of the adiabatic Combustion Temperature as a function of a variety of conditions including (i) reactant pre-heating to increase the Combustion Temperature or (ii) the addition of excess aluminium as a diluent to reduce the Combustion Temperature. As excess Al is added as a diluent, there is a decrease in Tad but it offers the potential to control the exothermicity of the SHS process and to form metal-ceramic composites. The range of criteria used for the determination of the appropriate Combustion condition for SHS, such as Tad ≥ 1800 K and -ΔHr298K/Cp298K.

T. Thomas - One of the best experts on this subject based on the ideXlab platform.

  • Thermodynamic predictions for the manufacture of Ti2AlC MAX-phase ceramic by Combustion synthesis
    Journal of Alloys and Compounds, 2014
    Co-Authors: T. Thomas, C R Bowen
    Abstract:

    Abstract This paper presents an analysis of the SHS reaction for the manufacture of Ti 2 AlC MAX phase materials using self-propagating high-Temperature synthesis (SHS). Enthalpy-Temperature calculations are presented for the reaction 2Ti + (1 +  y )Al + C → Ti 2 AlC +  y Al. The analysis and data presented allows the determination of the adiabatic Combustion Temperature as a function of a variety of conditions including (i) reactant pre-heating to increase the Combustion Temperature or (ii) the addition of excess aluminium as a diluent to reduce the Combustion Temperature. As excess Al is added as a diluent, there is a decrease in T ad but it offers the potential to control the exothermicity of the SHS process and to form metal–ceramic composites. The range of criteria used for the determination of the appropriate Combustion condition for SHS, such as T ad  ⩾ 1800 K and - Δ H r 298 K / C p 298 K ≥ 2000 K , are shown to be applicable for Ti 2 AlC MAX phase ceramics. The data presented is of use to those considering the manufacture of novel MAX phase ceramics by SHS.

  • Thermodynamic predictions for the manufacture of Ti2AlC MAX-phase ceramic by Combustion synthesis
    Journal of Alloys and Compounds, 2014
    Co-Authors: T. Thomas, C R Bowen
    Abstract:

    This paper presents an analysis of the SHS reaction for the manufacture of Ti2AlC MAX phase materials using self-propagating high-Temperature synthesis (SHS). Enthalpy-Temperature calculations are presented for the reaction 2Ti + (1 + y)Al + C → Ti2AlC + yAl. The analysis and data presented allows the determination of the adiabatic Combustion Temperature as a function of a variety of conditions including (i) reactant pre-heating to increase the Combustion Temperature or (ii) the addition of excess aluminium as a diluent to reduce the Combustion Temperature. As excess Al is added as a diluent, there is a decrease in Tad but it offers the potential to control the exothermicity of the SHS process and to form metal-ceramic composites. The range of criteria used for the determination of the appropriate Combustion condition for SHS, such as Tad ≥ 1800 K and -ΔHr298K/Cp298K.

M. Abdul Mujeebu - One of the best experts on this subject based on the ideXlab platform.

  • Influence of O_2 enrichment in dry air on Combustion Temperature, contaminant production and sulfur recovery, in SRU reaction furnace
    Forschung im Ingenieurwesen, 2018
    Co-Authors: Pedram Abdoli, Seyed Amin Hosseini, M. Abdul Mujeebu
    Abstract:

    Process difficulties such as low Temperature in Claus reaction furnaces result in the deactivation of catalysts and thus darken the color of produced sulfur. Combustion Temperature of the reactor is a key factor that directly influences the sulfur recovery and emission of contaminants. To solve this problem, the influence of O_2 enrichment in dry air on the amount of the produced sulfur, contaminants and reaction furnace Temperature was investigated in Abadan Oil Refinery with commercial Ansys Fluent software. The k‑ε, eddy dissipation and P1 models were used to model turbulent flow, Combustion and radiation respectively. Besides, the numerical predictions of reactor Temperature and mole fraction of products were validated with experimental data. The O_2 enrichment was done in three cases by assuming moisture-free inlet air. As the O_2 concentration is increased, the Combustion Temperature increases uniformly and the sulfur recovery reaches its maximum in high O_2 concentration. Moreover, with high O_2 concentration, the amount of contaminants such as COS and CS_2 decrease significantly. A six step chemical kinetics was used for the purpose of numerical simulation, which yielded more accurate predictions in comparison to previous works.

  • Influence of O 2 enrichment in dry air on Combustion Temperature, contaminant production and sulfur recovery, in SRU reaction furnace
    Forschung Im Ingenieurwesen-engineering Research, 2018
    Co-Authors: Pedram Abdoli, Seyed Amin Hosseini, M. Abdul Mujeebu
    Abstract:

    Process difficulties such as low Temperature in Claus reaction furnaces result in the deactivation of catalysts and thus darken the color of produced sulfur. Combustion Temperature of the reactor is a key factor that directly influences the sulfur recovery and emission of contaminants. To solve this problem, the influence of O2 enrichment in dry air on the amount of the produced sulfur, contaminants and reaction furnace Temperature was investigated in Abadan Oil Refinery with commercial Ansys Fluent software. The k‑e, eddy dissipation and P1 models were used to model turbulent flow, Combustion and radiation respectively. Besides, the numerical predictions of reactor Temperature and mole fraction of products were validated with experimental data. The O2 enrichment was done in three cases by assuming moisture-free inlet air. As the O2 concentration is increased, the Combustion Temperature increases uniformly and the sulfur recovery reaches its maximum in high O2 concentration. Moreover, with high O2 concentration, the amount of contaminants such as COS and CS2 decrease significantly. A six step chemical kinetics was used for the purpose of numerical simulation, which yielded more accurate predictions in comparison to previous works.

Junde Wang - One of the best experts on this subject based on the ideXlab platform.

  • Combustion Temperature measurement of solid propellant by remote sensing FTIR
    Spectroscopy and Spectral Analysis, 2004
    Co-Authors: Yan Li, Junde Wang, Xue-tie Zhou
    Abstract:

    : The Combustion Temperature of solid propellant was measured in this paper. Emission spectra of the Combustion flame were collected with remote sensing FTIR at the resolution of 4 cm(-1). The Combustion Temperatures with the burning time were calculated from the maximum spectral line intensity and the molecular rotation-vibration spectra of HF molecule, respectively. Combustion Temperatures at each time were all 1 788.8 K from the maximum spectral line intensity method. For comparison, the Temperatures calculated from the molecular rotation-vibration spectra were 1 859.7, 1 848. 3, 1 804.0 and 1 782.7 K, respectively. Results show that the two methods are all dependable in measuring Combustion Temperature of solid propellant. But the maximum spectral line intensity method is more convenient and rapid than the other when the Combustion is relatively stable.

  • Combustion Temperature measurement of solid propellant and the effect of organic compound on Combustion Temperature
    Spectroscopy and Spectral Analysis, 2003
    Co-Authors: Xue-tie Zhou, Yan Li, Zuo-ru Chen, Junde Wang
    Abstract:

    : The FTIR emission spectra in the spectral range of 4,500-300 cm-1 for the solid propellants were measured by a remote sensing FTIR system. The P-branch of fine structure of HCl fundamental band lying at 3.46 microns was used for precise Combustion Temperature measurement of the solid propellant. The effect of the organic compound in the solid propellant on the Combustion Temperature was discussed.

  • Combustion Temperature measurement of pyrotechnic composition using remote sensing Fourier transform infrared spectrometry
    Spectroscopy and Spectral Analysis, 2002
    Co-Authors: Xin-li Zhou, Yan Li, Junde Wang, Chun-xu Lu
    Abstract:

    In this paper, Combustion characterization of pyrotechnic composition is investigated using a remote sensing Fourier transform infrared spectrometry. The emission spectra have been recorded between 4 700 and 740 cm -1 with a spectral resolution of 4 cm -1.The Combustion Temperature can be determined remotely from spectral line intensity distribution of the fine structure of the emission fundamental band of gaseous products such as HF. The relationship between Combustion Temperature and Combustion time has been given.Results show that there is a violent mutative Temperature field with bigger Temperature gradient near Combustion surface.It reveals that the method of Temperature measurement using remote sensing FTIR for flame Temperature of unstable,violent and short time Combustion on real time is a rapid,accurate and sensitive technique without interference the flame Temperature field.Potential prospects of Temperature measurement,gas product concentration measurement and Combustion mechanism are also revealed. Corresponding author

Pedram Abdoli - One of the best experts on this subject based on the ideXlab platform.

  • Influence of O_2 enrichment in dry air on Combustion Temperature, contaminant production and sulfur recovery, in SRU reaction furnace
    Forschung im Ingenieurwesen, 2018
    Co-Authors: Pedram Abdoli, Seyed Amin Hosseini, M. Abdul Mujeebu
    Abstract:

    Process difficulties such as low Temperature in Claus reaction furnaces result in the deactivation of catalysts and thus darken the color of produced sulfur. Combustion Temperature of the reactor is a key factor that directly influences the sulfur recovery and emission of contaminants. To solve this problem, the influence of O_2 enrichment in dry air on the amount of the produced sulfur, contaminants and reaction furnace Temperature was investigated in Abadan Oil Refinery with commercial Ansys Fluent software. The k‑ε, eddy dissipation and P1 models were used to model turbulent flow, Combustion and radiation respectively. Besides, the numerical predictions of reactor Temperature and mole fraction of products were validated with experimental data. The O_2 enrichment was done in three cases by assuming moisture-free inlet air. As the O_2 concentration is increased, the Combustion Temperature increases uniformly and the sulfur recovery reaches its maximum in high O_2 concentration. Moreover, with high O_2 concentration, the amount of contaminants such as COS and CS_2 decrease significantly. A six step chemical kinetics was used for the purpose of numerical simulation, which yielded more accurate predictions in comparison to previous works.

  • Influence of O 2 enrichment in dry air on Combustion Temperature, contaminant production and sulfur recovery, in SRU reaction furnace
    Forschung Im Ingenieurwesen-engineering Research, 2018
    Co-Authors: Pedram Abdoli, Seyed Amin Hosseini, M. Abdul Mujeebu
    Abstract:

    Process difficulties such as low Temperature in Claus reaction furnaces result in the deactivation of catalysts and thus darken the color of produced sulfur. Combustion Temperature of the reactor is a key factor that directly influences the sulfur recovery and emission of contaminants. To solve this problem, the influence of O2 enrichment in dry air on the amount of the produced sulfur, contaminants and reaction furnace Temperature was investigated in Abadan Oil Refinery with commercial Ansys Fluent software. The k‑e, eddy dissipation and P1 models were used to model turbulent flow, Combustion and radiation respectively. Besides, the numerical predictions of reactor Temperature and mole fraction of products were validated with experimental data. The O2 enrichment was done in three cases by assuming moisture-free inlet air. As the O2 concentration is increased, the Combustion Temperature increases uniformly and the sulfur recovery reaches its maximum in high O2 concentration. Moreover, with high O2 concentration, the amount of contaminants such as COS and CS2 decrease significantly. A six step chemical kinetics was used for the purpose of numerical simulation, which yielded more accurate predictions in comparison to previous works.