Thermodynamic Calculations of the Critical Points of the H2–CO2–CH4–CO–H2O System

Cheng, Siyuan; Ma, Weigang; Sakoda, Naoya; Zhang, Xing

doi:10.1007/s10765-020-02725-5

Cited by 3 publications

(4 citation statements)

References 47 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The temperatures in the measurements were decreased in steps of 10 K. Water gas shift reaction and methanation reaction exist in the system initially filled with a H 2 –CO 2 –CH 4 –H 2 O mixture, and the sample became the H 2 –CO 2 –CH 4 –CO–H 2 O system. Thermodynamic calculations indicated that the quinary system was homogeneous at 720–939 K and 15–35 MPa . The composition of the gas phase after chemical reactions was analyzed by gas chromatography (GC) (Agilent 7890A) with the standard uncertainty of the mole fractions of components less than 0.010.…”

Section: Methodsmentioning

confidence: 99%

“…Thermodynamic calculations indicated that the quinary system was homogeneous at 720−939 K and 15−35 MPa. 36 The composition of the gas phase after chemical reactions was analyzed by gas chromatography (GC) (Agilent 7890A) with the standard uncertainty of the mole fractions of components less than 0.010. The composition of the quinary system was calculated by the method in our previous work.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

PVT Measurements of the H₂–CO₂–CH₄–CO–H₂O System at 740–939 K and 18.1–34.7 MPa with an Isochoric Apparatus and the Development of a Virial Equation of State

Cheng

Shang

et al. 2020

J. Chem. Eng. Data

Self Cite

View full text Add to dashboard Cite

Modeling the pVT properties of hydrogen mixtures at high temperatures is significant for the development of relevant production and utility systems. In this work, pVT measurements are reported for the H2–CO2–CH4–CO–H2O system at 740–939 K and 18.1–34.7 MPa with an isochoric apparatus. The expanded relative uncertainty (k = 2) of density is less than 0.015. Based on the present and previous pVT data, a virial equation of state (EOS) has been developed at 720–939 K and up to 35 MPa for the quinary system with relative uncertainty (k = 2) at density less than 0.015. The thermal pressure coefficient of the quinary system was calculated from the virial EOS and the comparison with the experimental values indicated that changes in the specific volume and composition of the quinary system existed in each set of measurements. Isochoric heat capacity of the quinary system was also calculated and was compared with the GERG-2008 EOS. The calculated isochoric heat capacities agree with the GERG-2008 EOS within 1.75% above 873 K and up to 35 MPa, while at lower temperatures, the deviations become larger (up to 3.66%).

show abstract

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

PVT Measurements of the H₂–CO₂–CH₄–CO–H₂O System at 740–939 K and 18.1–34.7 MPa with an Isochoric Apparatus and the Development of a Virial Equation of State

Cheng

Shang

et al. 2020

J. Chem. Eng. Data

Self Cite

View full text Add to dashboard Cite

show abstract

“…The hydrogen-containing mixtures measured are homogeneous according to the thermodynamics calculations. 26 According to the mass conservation of the sample inside the sample vessel and the low-temperature space, eq 26 is obtained: The density of the sample is determined according to eq 27.…”

Section: N P P Limmentioning

confidence: 99%

“…The temperature gradient between the high-temperature vessel and the low-temperature space mainly exists on the connection tube (the inner volume of which is not more than 0.0005 times that of the sample vessel) with the inner and outer diameters of about 0.876 mm and 1.588 mm, respectively; therefore, the effect of the temperature gradient on the composition of the sample is neglected in the PVT measurements. The hydrogen-containing mixtures measured are homogeneous according to the thermodynamics calculations …”

Section: Pvt Property and Eosmentioning

confidence: 99%

A Review of Experimental Researches on the Thermophysical Properties of Hydrogen-Containing Mixtures at High Temperatures and High Pressures

Cheng

Shang

et al. 2021

J. Chem. Eng. Data

Self Cite

View full text Add to dashboard Cite

Hydrogen is a promising energy carrier compared with the direct burning of coal or oil. The gasification processes of coal, oil, and other organic substances in supercritical water (>647 K and 22.1 MPa) produce hydrogen-containing mixtures. The mixtures mainly contain H2, CO2, CH4, and CO. Knowledge of the thermophysical properties which mainly include the PVT property, viscosity, and thermal conductivity is significant for the design and optimization of the relevant equipment. Currently available experimental researches on the thermophysical properties of hydrogen-containing mixtures at high temperatures and high pressures are reviewed. The review describes the progress in developing the measurement apparatuses, obtaining the thermophysical data, and observing the abnormal phenomena for the PVT property, viscosity, and thermal conductivity along with proposing the equation of state and transport property correlations of hydrogen-containing mixtures at high temperatures and high pressures. In addition, the possible advancements in both experiment and theory in the future are discussed.

show abstract

Database of thermophysical properties of H2/CO2/CO/CH4/H2O mixtures

Zhang

2023

International Journal of Hydrogen Energy

View full text Add to dashboard Cite

Thermodynamic Calculations of the Critical Points of the H2–CO2–CH4–CO–H2O System

Cited by 3 publications

References 47 publications

PVT Measurements of the H₂–CO₂–CH₄–CO–H₂O System at 740–939 K and 18.1–34.7 MPa with an Isochoric Apparatus and the Development of a Virial Equation of State

PVT Measurements of the H₂–CO₂–CH₄–CO–H₂O System at 740–939 K and 18.1–34.7 MPa with an Isochoric Apparatus and the Development of a Virial Equation of State

A Review of Experimental Researches on the Thermophysical Properties of Hydrogen-Containing Mixtures at High Temperatures and High Pressures

Database of thermophysical properties of H2/CO2/CO/CH4/H2O mixtures

Contact Info

Product

Resources

About

Thermodynamic Calculations of the Critical Points of the H2–CO2–CH4–CO–H2O System

Cited by 3 publications

References 47 publications

PVT Measurements of the H2–CO2–CH4–CO–H2O System at 740–939 K and 18.1–34.7 MPa with an Isochoric Apparatus and the Development of a Virial Equation of State

PVT Measurements of the H2–CO2–CH4–CO–H2O System at 740–939 K and 18.1–34.7 MPa with an Isochoric Apparatus and the Development of a Virial Equation of State

A Review of Experimental Researches on the Thermophysical Properties of Hydrogen-Containing Mixtures at High Temperatures and High Pressures

Database of thermophysical properties of H2/CO2/CO/CH4/H2O mixtures

Contact Info

Product

Resources

About

PVT Measurements of the H₂–CO₂–CH₄–CO–H₂O System at 740–939 K and 18.1–34.7 MPa with an Isochoric Apparatus and the Development of a Virial Equation of State

PVT Measurements of the H₂–CO₂–CH₄–CO–H₂O System at 740–939 K and 18.1–34.7 MPa with an Isochoric Apparatus and the Development of a Virial Equation of State