Thermophysical properties of hydrogen mixtures relevant for the development of the hydrogen economy: Review of available experimental data and thermodynamic models

Lozano-Martín, Daniel; Moreau, Alejandro; Chamorro, César R.

doi:10.1016/j.renene.2022.08.096

“…In order to minimize error due to secondary flow in the coiled diffusion column, the dimensionless group D e 2 Sc should be minimized . The effect of finite D e 2 Sc is discussed by Cadogan et al, who show that the relative error is approximately ( De 2 Sc /653) . In this study, De 2 Sc was <43 for (N 2 O + H 2 O) and <19 for (H 2 + H 2 O), leading to small relative corrections of <0.4% and <0.1%, respectively.…”

Section: Methodsmentioning

confidence: 99%

“…25 The effect of finite De 2 Sc is discussed by Cadogan et al, 11 who show that the relative error is approximately (De 2 Sc/653). 2 In this study, De 2 Sc was <43 for (N 2 O + H 2 O) and <19 for (H 2 + H 2 O), leading to small relative corrections of <0.4% and <0.1%, respectively. Figure 2a shows a typical sequence of chromatographic peaks corresponding to five injections for the N 2 O− water system at T = 423 K and p = 5.6 MPa.…”

Section: Methodsmentioning

confidence: 99%

See 1 more Smart Citation

Diffusion Coefficients of N₂O and H₂ in Water at Temperatures between 298.15 and 423.15 K with Pressures up to 30 MPa

Zhou

¹

,

Pan

²

,

Trusler

³

2023

J. Chem. Eng. Data

6

0

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The diffusion coefficients of CO 2 and H 2 in aqueous solutions are important in numerous processes including carbon capture, geological carbon storage, and reservoir storage of hydrogen. As CO 2 is reactive in some aqueous solutions, especially aqueous amine solvents for carbon capture, N 2 O is frequently studied as a surrogate. In this work, the Taylor dispersion technique was used to determine the diffusion coefficients of N 2 O and H 2 at high dilution in water at temperatures between 298.15 and 423.15 K and at pressures up to 30 MPa, with a standard relative uncertainty of 1.6%. The new data are intended to resolve significant discrepancies in the literature. The results confirm that temperature is the most important controlling factor and that the diffusion coefficients are nearly independent of pressure in the region studied. The experimental data were correlated using the Stokes−Einstein equation, with average absolute relative deviations of 0.5% for both systems.

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“…Hydrogen is an important energy carrier aiding the storage of energy from the renewable energy sources, such as wind and solar. Hydrogen also enhances energy sustainability [1][2][3] . Hydrogen has potential to reduce CO2 emissions in hard-to-decarbonise sectors such as transportation, iron and steel production, and in other chemical processes 1 .…”

Section: Introductionmentioning

confidence: 99%

“…Hydrogen also enhances energy sustainability [1][2][3] . Hydrogen has potential to reduce CO2 emissions in hard-to-decarbonise sectors such as transportation, iron and steel production, and in other chemical processes 1 . Over 80% of available hydrogen is obtained via combinations of steam reforming of natural gas and dehydrogenation of crude oil reformates (isoparaffins and cyclic naphthenes), and coal gasification 1,2 .…”

Section: Introductionmentioning

confidence: 99%

Viscosity of hydrogen and methane blends: experimental and modelling investigations

Owuna,

Chapoy,

Ahmadi

et al. 2024

Preprint

0

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Understanding of thermophysical and transport properties of H2-NG blends are needed for the gradual introduction of hydrogen into the national gas grid. A capillary tube viscometer was used to measure the viscosity of hydrogen + methane blends (with hydrogen mole fraction = 0, 0.1000, 0.1997, 0.5019, and 1) at temperatures from 213 to 324 K and pressures up to 31 MPa. A total 147 experimental viscosity measurements were made for the three H2 + CH4 blends and compared against the predictions of five different viscosity models: a one-reference corresponding states (Pedersen) model, a two-reference corresponding states (CS2) model, an extended corresponding states (ECS) model, a corresponding states model derived from molecular dynamic simulations of Lennard Jones (LJ) fluids, and a residual entropy scaling (SRES) method. All the model predictions showed a relatively low deviation compared to the measured viscosities. The density required for viscosity model predictions were computed using Multi-Fluid Helmholtz Energy Approximation (MFHEA) equations of state (EoS). To check the experimental procedure and applicability of the viscometer equipment, viscosity validation measurements were carried out for propane, hydrogen, and methane. The measured viscosities of the pure components were in good agreement with the respective viscosity models with AARD of 0.24%, 0.25%, and 0.58% for propane, hydrogen, and methane, respectively.

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Viscosity of Hydrogen and Methane Blends: Experimental and Modelling Investigations

Owuna,

Chapoy,

Ahmadi

et al. 2024

Int J Thermophys

0

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Understanding of thermophysical and transport properties of H2-NG blends are needed for the gradual introduction of hydrogen into the national gas grid. A capillary tube viscometer was used to measure the viscosity of hydrogen + methane blends (with hydrogen mole fraction = 0, 0.1000, 0.1997, 0.5019, and 1) at temperatures from 213 to 324 K and pressures up to 31 MPa. A total 147 experimental viscosity measurements were made for the three H2 + CH4 blends and compared against the predictions of five different viscosity models: a one-reference corresponding states (Pedersen) model, a two-reference corresponding states (CS2) model, an extended corresponding states (ECS) model, a corresponding states model derived from molecular dynamic simulations of Lennard Jones (LJ) fluids, and a residual entropy scaling (SRES) method. All the model predictions showed a relatively low deviation compared to the measured viscosities. The density required for viscosity model predictions were computed using Multi-Fluid Helmholtz Energy Approximation (MFHEA) equations of state (EoS). To check the experimental procedure and applicability of the viscometer equipment, viscosity validation measurements were carried out for propane, hydrogen, and methane. The measured viscosities of the pure components were in good agreement with the respective viscosity models with AARD of 0.24%, 0.25%, and 0.58% for propane, hydrogen, and methane, respectively. Graphical Abstract

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Thermophysical properties of hydrogen mixtures relevant for the development of the hydrogen economy: Review of available experimental data and thermodynamic models

Cited by 25 publications

References 150 publications

Diffusion Coefficients of N₂O and H₂ in Water at Temperatures between 298.15 and 423.15 K with Pressures up to 30 MPa

Diffusion Coefficients of N₂O and H₂ in Water at Temperatures between 298.15 and 423.15 K with Pressures up to 30 MPa

Viscosity of hydrogen and methane blends: experimental and modelling investigations

Viscosity of Hydrogen and Methane Blends: Experimental and Modelling Investigations

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Thermophysical properties of hydrogen mixtures relevant for the development of the hydrogen economy: Review of available experimental data and thermodynamic models

Cited by 25 publications

References 150 publications

Diffusion Coefficients of N2O and H2 in Water at Temperatures between 298.15 and 423.15 K with Pressures up to 30 MPa

Diffusion Coefficients of N2O and H2 in Water at Temperatures between 298.15 and 423.15 K with Pressures up to 30 MPa

Viscosity of hydrogen and methane blends: experimental and modelling investigations

Viscosity of Hydrogen and Methane Blends: Experimental and Modelling Investigations

Contact Info

Product

Resources

About

Diffusion Coefficients of N₂O and H₂ in Water at Temperatures between 298.15 and 423.15 K with Pressures up to 30 MPa

Diffusion Coefficients of N₂O and H₂ in Water at Temperatures between 298.15 and 423.15 K with Pressures up to 30 MPa