Application of nonlinear regression in the development of a wide range formulation for HCFC-22

Kamei, Aika; Beyerlein, Steven; Jacobsen, R. T.

doi:10.1007/bf02081283

Cited by 52 publications

(17 citation statements)

References 11 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Extensive literature is available on these highly flexible empirical multiparameter equations of state. 9,12,31 The detailed formulations and derivations for the equations of state used in this paper can be found in the Supporting Information, where all of the property equations and variables of the EOS are listed.…”

Section: Equation Of State and Its Uncertainty Calculationmentioning

confidence: 99%

“…12 The EOS of refrigerant R-22 has 55 parameters, and its covariance matrix is a 57×57 square matrix. 9 Following eq 9, the variance σ p 2 is only multiplied with the elements of J p (θ EOS * , τ, δ); the same holds for the other properties. To illustrate this, it is possible to rewrite eq 32 in the following way…”

Section: Equation Of State and Its Uncertainty Calculationmentioning

confidence: 99%

See 1 more Smart Citation

Covariance-Based Uncertainty Analysis of Reference Equations of State

Cheung¹,

Frutiger

Bell

et al. 2020

J. Chem. Eng. Data

View full text Add to dashboard Cite

 Users may download and print one copy of any publication from the public portal for the purpose of private study or research.  You may not further distribute the material or use it for any profit-making activity or commercial gain  You may freely distribute the URL identifying the publication in the public portal If you believe that this document breaches copyright please contact us providing details, and we will remove access to the work immediately and investigate your claim.

show abstract

Section: Equation Of State and Its Uncertainty Calculationmentioning

confidence: 99%

Section: Equation Of State and Its Uncertainty Calculationmentioning

confidence: 99%

Covariance-Based Uncertainty Analysis of Reference Equations of State

Cheung¹,

Frutiger

Bell

et al. 2020

J. Chem. Eng. Data

View full text Add to dashboard Cite

show abstract

“…In this analysis, the NIST REFPROP v.9.1 software package was used to calculate the pure component fugacities of HCFC-22 using the Helmholtz equation of state. 15,21 The Henry's law constant−fugacity relationship in eq 13 was modeled using the second-order polynomial expansion, shown in eq 14…”

mentioning

confidence: 99%

Solubility and Diffusivity of Chlorodifluoromethane in Imidazolium Ionic Liquids: [emim][Tf₂N], [bmim][BF₄], [bmim][PF₆], and [emim][TFES]

Minnick

Shiflett

2019

Ind. Eng. Chem. Res.

View full text Add to dashboard Cite

Solubility and diffusivity measurements of chlorodifluoromethane (HCFC-22) in four ionic liquids (ILs)[emim][Tf 2 N], [bmim][BF 4 ], [bmim][PF 6 ], and [emim][TFES]were conducted using an IGA gravimetric microbalance at temperatures between 283.2 and 348.2 K. The solubility results were modeled using the NRTL activity coefficient method and were also used to calculate Henry's law constants (k H ) at infinite dilution. van't Hoff relationships were used to calculate the enthalpy (ΔH̅ sol ) and entropy (ΔS̅ sol ) of absorption for HCFC-22 in each IL. Timedependent absorption data collected by the IGA microbalance was used to calculate the diffusion coefficient of HCFC-22 in each IL. The diffusion coefficient results were used to calculate the hydrodynamic radius of the solute molecule using the Stokes−Einstein relationship. The experimental results for chlorodifluoromethane and [emim][Tf 2 N] are compared with previous studies on trifluoromethane and other fluorocarbons to understand the impact of atom substitution (e.g., CHF 2 -F vs CHF 2 -Cl) on fluorocarbon solubility in an ionic liquid.

show abstract

“…The high [42]. The equation of state developed by Kamei et al [43] underestimates the value of the third virial coefficient. For R-125, the correlation developed by Weber and Boyes [44] predicts lower values for the third virial coefficient.…”

Section: Resultsmentioning

confidence: 98%

Estimation of third virial coefficients at low reduced temperatures

Ramos-Estrada

Iglesias‐Silva

Hall

et al. 2006

Fluid Phase Equilibria

View full text Add to dashboard Cite

Application of nonlinear regression in the development of a wide range formulation for HCFC-22

Cited by 52 publications

References 11 publications

Covariance-Based Uncertainty Analysis of Reference Equations of State

Covariance-Based Uncertainty Analysis of Reference Equations of State

Solubility and Diffusivity of Chlorodifluoromethane in Imidazolium Ionic Liquids: [emim][Tf₂N], [bmim][BF₄], [bmim][PF₆], and [emim][TFES]

Estimation of third virial coefficients at low reduced temperatures

Contact Info

Product

Resources

About

Application of nonlinear regression in the development of a wide range formulation for HCFC-22

Cited by 52 publications

References 11 publications

Covariance-Based Uncertainty Analysis of Reference Equations of State

Covariance-Based Uncertainty Analysis of Reference Equations of State

Solubility and Diffusivity of Chlorodifluoromethane in Imidazolium Ionic Liquids: [emim][Tf2N], [bmim][BF4], [bmim][PF6], and [emim][TFES]

Estimation of third virial coefficients at low reduced temperatures

Contact Info

Product

Resources

About

Solubility and Diffusivity of Chlorodifluoromethane in Imidazolium Ionic Liquids: [emim][Tf₂N], [bmim][BF₄], [bmim][PF₆], and [emim][TFES]