O2 Solubility in C7–C16n-Alkanes

Muhammad N. Siddiquee; Adriana Rivolta; Mohammad M. Hossain; Arno de Klerk

doi:10.1007/s10953-025-01428-5

O₂ Solubility in C₇–C₁₆n-Alkanes

Muhammad N. Siddiquee^*, Adriana Rivolta, Mohammad M. Hossain, Arno de Klerk

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

Abstract

Oxygen (O₂) solubility in hydrocarbons plays a crucial role to control conversion and product selectivity during liquid phase oxidation of hydrocarbons to produce petrochemicals. In spite of its importance, experimental measurements of O₂ solubility in liquid hydrocarbons are not abundant. Because it is challenging to experimentally determine the oxygen in hydrocarbons following traditional titration method as reagents react with hydrocarbons. In the current study, the O₂ solubility was measured using a differential pressure-based measurement method in n-heptane, n-decane, n-dodecane, n-tetradecane, n-hexadecane, and tetralin at 294 K. Henry constants were calculated and were in the range 0.03–0.40 mol‧m⁻³‧kPa⁻¹. At 140 kPa O₂ pressure, in n-tetradecane and n-hexadecane O₂ solubility was in the range 4–24 mol‧m⁻³, compared to O₂ solubility in n-heptane and n-decane which was in the range 27–57 mol‧m⁻³. The O₂ solubility expressed as a mole fraction of the total liquid appeared to have a slightly decreasing trend with an increase in carbon number in the alkanes.

Original language	English
Pages (from-to)	485-497
Number of pages	13
Journal	Journal of Solution Chemistry
Volume	54
Issue number	4
DOIs	https://doi.org/10.1007/s10953-025-01428-5
State	Published - Apr 2025

Bibliographical note

Publisher Copyright:
© The Author(s), under exclusive licence to Springer Science+Business Media, LLC, part of Springer Nature 2025.

Keywords

Henry constant
Oxygen solubility
n-Alkanes

ASJC Scopus subject areas

Biophysics
Biochemistry
Molecular Biology
Physical and Theoretical Chemistry

Access to Document

10.1007/s10953-025-01428-5

Cite this

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title = "O2 Solubility in C7–C16n-Alkanes",

abstract = "Oxygen (O2) solubility in hydrocarbons plays a crucial role to control conversion and product selectivity during liquid phase oxidation of hydrocarbons to produce petrochemicals. In spite of its importance, experimental measurements of O2 solubility in liquid hydrocarbons are not abundant. Because it is challenging to experimentally determine the oxygen in hydrocarbons following traditional titration method as reagents react with hydrocarbons. In the current study, the O2 solubility was measured using a differential pressure-based measurement method in n-heptane, n-decane, n-dodecane, n-tetradecane, n-hexadecane, and tetralin at 294 K. Henry constants were calculated and were in the range 0.03–0.40 mol‧m−3‧kPa−1. At 140 kPa O2 pressure, in n-tetradecane and n-hexadecane O2 solubility was in the range 4–24 mol‧m−3, compared to O2 solubility in n-heptane and n-decane which was in the range 27–57 mol‧m−3. The O2 solubility expressed as a mole fraction of the total liquid appeared to have a slightly decreasing trend with an increase in carbon number in the alkanes.",

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author = "Siddiquee, \{Muhammad N.\} and Adriana Rivolta and Hossain, \{Mohammad M.\} and \{de Klerk\}, Arno",

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AU - Rivolta, Adriana

AU - Hossain, Mohammad M.

AU - de Klerk, Arno

N1 - Publisher Copyright: © The Author(s), under exclusive licence to Springer Science+Business Media, LLC, part of Springer Nature 2025.

PY - 2025/4

Y1 - 2025/4

N2 - Oxygen (O2) solubility in hydrocarbons plays a crucial role to control conversion and product selectivity during liquid phase oxidation of hydrocarbons to produce petrochemicals. In spite of its importance, experimental measurements of O2 solubility in liquid hydrocarbons are not abundant. Because it is challenging to experimentally determine the oxygen in hydrocarbons following traditional titration method as reagents react with hydrocarbons. In the current study, the O2 solubility was measured using a differential pressure-based measurement method in n-heptane, n-decane, n-dodecane, n-tetradecane, n-hexadecane, and tetralin at 294 K. Henry constants were calculated and were in the range 0.03–0.40 mol‧m−3‧kPa−1. At 140 kPa O2 pressure, in n-tetradecane and n-hexadecane O2 solubility was in the range 4–24 mol‧m−3, compared to O2 solubility in n-heptane and n-decane which was in the range 27–57 mol‧m−3. The O2 solubility expressed as a mole fraction of the total liquid appeared to have a slightly decreasing trend with an increase in carbon number in the alkanes.

AB - Oxygen (O2) solubility in hydrocarbons plays a crucial role to control conversion and product selectivity during liquid phase oxidation of hydrocarbons to produce petrochemicals. In spite of its importance, experimental measurements of O2 solubility in liquid hydrocarbons are not abundant. Because it is challenging to experimentally determine the oxygen in hydrocarbons following traditional titration method as reagents react with hydrocarbons. In the current study, the O2 solubility was measured using a differential pressure-based measurement method in n-heptane, n-decane, n-dodecane, n-tetradecane, n-hexadecane, and tetralin at 294 K. Henry constants were calculated and were in the range 0.03–0.40 mol‧m−3‧kPa−1. At 140 kPa O2 pressure, in n-tetradecane and n-hexadecane O2 solubility was in the range 4–24 mol‧m−3, compared to O2 solubility in n-heptane and n-decane which was in the range 27–57 mol‧m−3. The O2 solubility expressed as a mole fraction of the total liquid appeared to have a slightly decreasing trend with an increase in carbon number in the alkanes.

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