Flow-calorimetric results for the massic heat capacitycpand the Joule–Thomson coefficient of CH4, of (0.85CH4+0.15C2H6), and of a mixture similar to natural gas

Ernst, G.; Keil, B; Wirbser, H.; Jaeschke, M.

doi:10.1006/jcht.2000.0740

Cited by 47 publications

(36 citation statements)

References 5 publications

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“…Fig. 7 shows the distribution of natural gas heat capacity data from the current study and that from Ernst et al [35] and Barreau et al [36]. The data from this study, shows a good distribution over a wide range of pressures and temperatures, although high pressures (above 300 bar) and temperatures (400 K) are not available in the experimental data.…”

Section: Tablesupporting

confidence: 49%

On the isobaric specific heat capacity of natural gas

Jarrahian

Karami

Heidaryan

2014

Fluid Phase Equilibria

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Section: Tablesupporting

confidence: 49%

On the isobaric specific heat capacity of natural gas

Jarrahian

Karami

Heidaryan

2014

Fluid Phase Equilibria

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“…The experimental method and the evaluation of the c p -measurements is described in detail in earlier papers [1][2][3][4][5][6]. The massic heat capacity is determined as heating power P supplied to the flow calorimeter divided by the mass flow rate _ m of the investigated substance and the difference between the temperature change DT m of a main experiment with heating and the temperature change DT b of a blank experiment without heating:…”

Section: Methodsmentioning

confidence: 99%

Excess enthalpy HE and massic heat capacity cp of (water+methanol) at temperatures between 323K and 513K and pressures up to 10MPa

Dettmann

Ernst

Wirbser

2006

The Journal of Chemical Thermodynamics

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“…It is worth noting, however, the dramatic influence of the correction for N 2 and CO 2 presence on the results for the mixture similar to natural gas of Ernst et al (2001).…”

Section: Equation-of-state Accuracymentioning

confidence: 99%

“…Sage et al (1943) reported experimental data for isobaric heat capacity c p and Joule-Thomson coefficient J of two natural-gas samples. Barreau et al (1996), using the same natural-gas samples as Montel et al (1995), measured heat capacity c p , and Ernst et al (2001) investigated c p and J of pure methane, of a binary mixture of methane/ethane, and of a mixture similar to natural gas. It may be observed that these last two mixtures are virtually the same as those used by Costa Gomes and Trusler (1998a) for speed-of-sound determination (see Table 4).…”

Section: Equation-of-state Accuracymentioning

confidence: 99%

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A Model To Calculate the Theoretical Critical Flow Rate Through Venturi Gas Lift Valves

Almeida

2010

SPE Journal

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A model to calculate the theoretical critical flow rate of nitrogen (N 2 ) or natural gas through a Venturi gas lift valve is described herein. This new model considers real-gas effects not only in density calculations but also in other thermodynamic properties that are relevant during gas isentropic evolution.For the properties of N 2 , the Bennedict, Webb, and Rubin (BWR) equation of state and an accurate correlation for the idealgas isobaric heat capacity were used. For natural gas, the Dranchuk and Abou-Kassem equation, which reproduces the well-known Standing and Katz chart, was used, and, for the ideal-gas isobaric heat capacity, it was assumed that the natural gas was a mixture of methane and ethane only, their individual ideal-gas heat capacity being calculated by updated correlations.To validate the use of the proposed equations of state, a comparison of calculated with experimental or reference data on properties of N 2 and natural gas (including pure methane and some relevant mixtures) was performed with very good results for N 2 and for natural-gas compositions usual in gas lift operations (dry gas with very small amounts of contaminants). For natural gas with moderate amounts of N 2 and carbon dioxide (CO 2 ), accurate results were obtained after correction of critical conditions and of ideal heat capacity. The model was also compared with other theoretical models found in the literature, which use compositional approaches for natural gas, with excellent results. Some experimental results obtained with commercial Venturi valves manufactured in Brazil are also presented.

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Flow-calorimetric results for the massic heat capacitycpand the Joule–Thomson coefficient of CH4, of (0.85CH4+0.15C2H6), and of a mixture similar to natural gas

Cited by 47 publications

References 5 publications

On the isobaric specific heat capacity of natural gas

On the isobaric specific heat capacity of natural gas

Excess enthalpy HE and massic heat capacity cp of (water+methanol) at temperatures between 323K and 513K and pressures up to 10MPa

A Model To Calculate the Theoretical Critical Flow Rate Through Venturi Gas Lift Valves

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