Thermophysics of metal alkanoates. Heat capacities and thermodynamic properties of potassiumn-hexanoate from temperatures from 6 K to 600 K. VIII

Ngeyi, Stanley P.; Malik, Imrana; Justice, Bruce H.; Westrum, Edgar F.

doi:10.1006/jcht.2000.0743

Cited by 3 publications

(2 citation statements)

References 11 publications

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“…In our study melting to a liquid crystal phase was observed at T/K = (582.4) with ΔH/kJ•kg −1 = (108). The temperature was in good agreement with most literature values, which were in the range T/K = (578 to 581.7), 7 with only Ngeyi et al 30 reporting a much lower temperature. The enthalpy change was comparable to that in literature.…”

Section: Discussionsupporting

confidence: 90%

“…However, it is known from previous work with Licarboxylates that on cooling the metastable solid phase may be persistent. 29 No solid−solid transitions were reported in the older literature, 7 but in a study that spanned the temperature range T/K = (6 to 600) Ngeyi et al 30 reported transitions at T/ K = (252.5, 324, and 495) with ΔH/kJ•kg −1 = (13.1, 14.1, 16.4). In our study melting to a liquid crystal phase was observed at T/K = (582.4) with ΔH/kJ•kg −1 = (108).…”

Section: Discussionmentioning

confidence: 99%

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Thermal Behavior of Potassium C₁–C₁₂ n-Alkanoates and Its Relevance to Fischer–Tropsch

Bui

Klerk

2014

J. Chem. Eng. Data

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The thermal behavior of potassium C1–C12 n-alkanoates (K-carboxylates) were studied over the temperature range T/K = (243 to 873). A number of problems in industrial Fischer–Tropsch facilities were attributed to these compounds, but this study also revealed some beneficial effect that may directly be related to the thermal behavior of potassium methanoate. The unusually low melting point of potassium methanoate, T/K = (442.2 ± 0.3), combined with its thermal stability to T/K ≈ (693), may explain the ease of distribution of the potassium promoter of iron-based Fischer–Tropsch catalysts during synthesis even when potassium promoter is added separately. The C2–C12 K-carboxylates were all thermally stable at temperatures T/K ≤ (713), and significant mass loss was not observed at T/K ≤ (748). The thermal stability and high melting point of potassium propanoate, T/K = (636.9 ± 0.3) and potassium butanoate, T/K = (623.1 ± 0.3), in particular caused these compounds to be prone to cause pressure drop problems in refining units. The C4–C12 K-carboxylates melted to a liquid crystal phase first, before clearing at higher temperature. One or more solid–solid transitions were observed in all of the K-carboxylates, with the exception of potassium hexanoate.

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Section: Discussionsupporting

confidence: 90%

Section: Discussionmentioning

confidence: 99%

Thermal Behavior of Potassium C₁–C₁₂ n-Alkanoates and Its Relevance to Fischer–Tropsch

Bui

Klerk

2014

J. Chem. Eng. Data

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Heat Capacity of Liquids: Critical Review and Recommended Values. Supplement I

Zábranský

Růžička

Domalski

2001

Journal of Physical and Chemical Reference Data

147

100

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A study was carried out in which new experimental data on heat capacities of pure liquid organic and some inorganic compounds were compiled, critically evaluated, and recommended values provided. Compounds included in the compilation have a melting point below 573 K. The bulk of the compiled data covers data published in the primary literature between 1993 and 1999 and some data of 2000. However, some data from older sources were also included. The data were taken from almost 1030 literature references. Parameters of correlating equations for temperature dependence of heat capacities of liquids were developed. This paper is an update of a two volume monograph entitled Heat Capacity of Liquids: Critical Review and Recommended Values ͑96ZAB/RUZ͒ that was published in 1996 in the Journal of Physical and Chemical Reference Data as Monograph No. 6 and was the product of the IUPAC Project No. 121/11/87.

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Heat Capacity of Liquids: Critical Review and Recommended Values. Supplement II

Zábranský

Kolská²,

Růžička

et al. 2010

Journal of Physical and Chemical Reference Data

102

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A study was carried out in which new experimental data on heat capacities of pure liquid organic and some inorganic compounds were compiled and critically evaluated and recommended values provided. The bulk of the compiled data covers data published in the primary literature between 2000 and 2006 and includes some data published in 2007. However, some data from older sources are also included. The list of compound families covered was extended to include ionic liquids. Parameters of correlating equations for the temperature dependence of heat capacities of liquids were developed. This paper is an update of a two volume monograph entitled Heat Capacity of Liquids: Critical Review and Recommended Values by Zábranský et al. [J. Phys. Chem. Ref. Data 30, 1199 (2001)], which was published in 1996 in the Journal of Physical and Chemical Reference Data as Monograph No. 6, and of Supplement I.

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Thermophysics of metal alkanoates. Heat capacities and thermodynamic properties of potassiumn-hexanoate from temperatures from 6 K to 600 K. VIII

Cited by 3 publications

References 11 publications

Thermal Behavior of Potassium C₁–C₁₂ n-Alkanoates and Its Relevance to Fischer–Tropsch

Thermal Behavior of Potassium C₁–C₁₂ n-Alkanoates and Its Relevance to Fischer–Tropsch

Heat Capacity of Liquids: Critical Review and Recommended Values. Supplement I

Heat Capacity of Liquids: Critical Review and Recommended Values. Supplement II

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Thermophysics of metal alkanoates. Heat capacities and thermodynamic properties of potassiumn-hexanoate from temperatures from 6 K to 600 K. VIII

Cited by 3 publications

References 11 publications

Thermal Behavior of Potassium C1–C12 n-Alkanoates and Its Relevance to Fischer–Tropsch

Thermal Behavior of Potassium C1–C12 n-Alkanoates and Its Relevance to Fischer–Tropsch

Heat Capacity of Liquids: Critical Review and Recommended Values. Supplement I

Heat Capacity of Liquids: Critical Review and Recommended Values. Supplement II

Contact Info

Product

Resources

About

Thermal Behavior of Potassium C₁–C₁₂ n-Alkanoates and Its Relevance to Fischer–Tropsch

Thermal Behavior of Potassium C₁–C₁₂ n-Alkanoates and Its Relevance to Fischer–Tropsch