The Experts below are selected from a list of 15435 Experts worldwide ranked by ideXlab platform
Shigeru Koyama - One of the best experts on this subject based on the ideXlab platform.
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thermodynamic property surfaces for adsorption of r507a r134a and n butane on pitch based carbonaceous porous materials
Heat Transfer Engineering, 2010Co-Authors: Anutosh Chakraborty, Bidyut Baran Saha, Ibrahim I Elsharkawy, Shigeru KoyamaAbstract:The thermodynamic property surfaces of R507A, R134a, and n-butane on pitch-based carbonaceous porous material (Maxsorb III) are developed from rigorous Classical Thermodynamics and experimentally measured adsorption isotherm data. These property fields enable us to compute the entropy, enthalpy, internal energy, and heat of adsorption as a function of pressure, temperature, and the amount of adsorbate. The entropy and enthalpy maps are necessary for the analysis of adsorption cooling cycle and gas storage. We have shown here that it is possible to plot an adsorption cooling cycle on the temperature-entropy (T–s) and enthalpy-uptake (h–x) maps.
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theoretical insight of physical adsorption for a single component adsorbent adsorbate system i thermodynamic property surfaces
Langmuir, 2009Co-Authors: Anutosh Chakraborty, Shigeru Koyama, Bidyut Baran Saha, Kandadai SrinivasanAbstract:Thermodynamic property surfaces for a single-component adsorbent + adsorbate system are derived and developed from the viewpoint of Classical Thermodynamics, thermodynamic requirements of chemical equilibrium, Gibbs law, and Maxwell relations. They enable us to compute the entropy and enthalpy of the adsorbed phase, the isosteric heat of adsorption, specific heat capacity, and the adsorbed phase volume thoroughly. These equations are very simple and easy to handle for calculating the energetic performances of any adsorption system. We have shown here that the derived thermodynamic formulations fill up the information gap with respect to the state of adsorbed phase to dispel the confusion as to what is the actual state of the adsorbed phase. We have also discussed and established the temperature-entropy diagrams of (i) CaCl2-in-silica gel + water system for cooling applications, and (ii) activated carbon (Maxsorb III) + methane system for gas storage.
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specific heat capacity of a single component adsorbent adsorbate system
Applied Physics Letters, 2007Co-Authors: Anuthosh Chakraborty, Idyut Bara Saha, Shigeru KoyamaAbstract:A thermodynamic framework for calculating the specific heat capacity (Cp) of a single component adsorbent+adsorbate system has been derived and developed using the Classical Thermodynamics, and these are essential for the design of adsorption processes. The derived formulation of the Cp is compared with the experimentally measured Cp of adsorbent+adsorbate systems. The purpose of this letter is to fill up the information gap with respect to the state of adsorbed phase to dispel the confusion as to what is the actual state of the adsorbed phase.
Kandadai Srinivasan - One of the best experts on this subject based on the ideXlab platform.
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theoretical insight of physical adsorption for a single component adsorbent adsorbate system i thermodynamic property surfaces
Langmuir, 2009Co-Authors: Anutosh Chakraborty, Shigeru Koyama, Bidyut Baran Saha, Kandadai SrinivasanAbstract:Thermodynamic property surfaces for a single-component adsorbent + adsorbate system are derived and developed from the viewpoint of Classical Thermodynamics, thermodynamic requirements of chemical equilibrium, Gibbs law, and Maxwell relations. They enable us to compute the entropy and enthalpy of the adsorbed phase, the isosteric heat of adsorption, specific heat capacity, and the adsorbed phase volume thoroughly. These equations are very simple and easy to handle for calculating the energetic performances of any adsorption system. We have shown here that the derived thermodynamic formulations fill up the information gap with respect to the state of adsorbed phase to dispel the confusion as to what is the actual state of the adsorbed phase. We have also discussed and established the temperature-entropy diagrams of (i) CaCl2-in-silica gel + water system for cooling applications, and (ii) activated carbon (Maxsorb III) + methane system for gas storage.
Anuthosh Chakraborty - One of the best experts on this subject based on the ideXlab platform.
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specific heat capacity of a single component adsorbent adsorbate system
Applied Physics Letters, 2007Co-Authors: Anuthosh Chakraborty, Idyut Bara Saha, Shigeru KoyamaAbstract:A thermodynamic framework for calculating the specific heat capacity (Cp) of a single component adsorbent+adsorbate system has been derived and developed using the Classical Thermodynamics, and these are essential for the design of adsorption processes. The derived formulation of the Cp is compared with the experimentally measured Cp of adsorbent+adsorbate systems. The purpose of this letter is to fill up the information gap with respect to the state of adsorbed phase to dispel the confusion as to what is the actual state of the adsorbed phase.
Rico Pohle - One of the best experts on this subject based on the ideXlab platform.
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theory of ca 10 cr 7 o 28 as a bilayer breathing kagome magnet Classical Thermodynamics and semiClassical dynamics
Physical Review B, 2021Co-Authors: Rico Pohle, Han Yan, Nic ShannonAbstract:Ca$_{10}$Cr$_7$O$_{28}$ is a novel spin-$1/2$ magnet exhibiting spin liquid behaviour which sets it apart from any previously studied model or material. However, understanding Ca$_{10}$Cr$_7$O$_{28}$ presents a significant challenge, because the low symmetry of the crystal structure leads to very complex interactions, with up to seven inequivalent coupling parameters in the unit cell. Here we explore the origin of the spin-liquid behaviour in Ca$_{10}$Cr$_7$O$_{28}$, starting from the simplest microscopic model consistent with experiment - a Heisenberg model on a single bilayer of the breathing-kagome (BBK) lattice. We use a combination of Classical Monte Carlo (MC) simulation and (semi-)Classical Molecular Dynamics (MD) simulation to explore the thermodynamic and dynamic properties of this model, and compare these with experimental results for Ca$_{10}$Cr$_7$O$_{28}$. We uncover qualitatively different behaviours on different timescales, and argue that the ground state of Ca$_{10}$Cr$_7$O$_{28}$ is born out of a slowly-fluctuating "spiral spin liquid", while faster fluctuations echo the U(1) spin liquid found in the kagome antiferromagnet. We also identify key differences between longitudinal and transverse spin excitations in applied magnetic field, and argue that these are a distinguishing feature of the spin liquid in the BBK model.
Anutosh Chakraborty - One of the best experts on this subject based on the ideXlab platform.
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thermodynamic property surfaces for adsorption of r507a r134a and n butane on pitch based carbonaceous porous materials
Heat Transfer Engineering, 2010Co-Authors: Anutosh Chakraborty, Bidyut Baran Saha, Ibrahim I Elsharkawy, Shigeru KoyamaAbstract:The thermodynamic property surfaces of R507A, R134a, and n-butane on pitch-based carbonaceous porous material (Maxsorb III) are developed from rigorous Classical Thermodynamics and experimentally measured adsorption isotherm data. These property fields enable us to compute the entropy, enthalpy, internal energy, and heat of adsorption as a function of pressure, temperature, and the amount of adsorbate. The entropy and enthalpy maps are necessary for the analysis of adsorption cooling cycle and gas storage. We have shown here that it is possible to plot an adsorption cooling cycle on the temperature-entropy (T–s) and enthalpy-uptake (h–x) maps.
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theoretical insight of physical adsorption for a single component adsorbent adsorbate system i thermodynamic property surfaces
Langmuir, 2009Co-Authors: Anutosh Chakraborty, Shigeru Koyama, Bidyut Baran Saha, Kandadai SrinivasanAbstract:Thermodynamic property surfaces for a single-component adsorbent + adsorbate system are derived and developed from the viewpoint of Classical Thermodynamics, thermodynamic requirements of chemical equilibrium, Gibbs law, and Maxwell relations. They enable us to compute the entropy and enthalpy of the adsorbed phase, the isosteric heat of adsorption, specific heat capacity, and the adsorbed phase volume thoroughly. These equations are very simple and easy to handle for calculating the energetic performances of any adsorption system. We have shown here that the derived thermodynamic formulations fill up the information gap with respect to the state of adsorbed phase to dispel the confusion as to what is the actual state of the adsorbed phase. We have also discussed and established the temperature-entropy diagrams of (i) CaCl2-in-silica gel + water system for cooling applications, and (ii) activated carbon (Maxsorb III) + methane system for gas storage.