Solubility of Sulfur in Supercritical Propane-Butane Mixture

被引：1
|
作者：
Bilalov, T. R. [1 ]
Khabriev, I. Sh. [1 ]
Khairutdinov, V. F. [1 ]
Akhmetzyanov, T. R. [1 ]
Gumerov, F. M. [1 ]
机构：
[1] Kazan Natl Res Technol Univ, Kazan 420015, Russia
来源：
RUSSIAN JOURNAL OF PHYSICAL CHEMISTRY B | 2023年 / 17卷 / 07期
基金：
俄罗斯科学基金会;
关键词：
sulfur; supercritical propane-butane mixture; phase equilibrium; solubility; thermodynamic model; Peng-Robinson equation; HYDROGEN-SULFIDE; EXTRACTION;
D O I：
10.1134/S1990793123070035
中图分类号：
O64 [物理化学（理论化学）、化学物理学]; O56 [分子物理学、原子物理学];
学科分类号：
070203 ; 070304 ; 081704 ; 1406 ;
摘要：
The phase equilibrium of the propane-butane-sulfur system is studied using a high-pressure optical cell in the temperature range 403-443 K and pressure from 5.3 to 24.5 MPa, and the phase behavior is found to be of type V. The solubility of sulfur in a supercritical propane-butane mixture is estimated from the characteristics of the vapor branch of the phase equilibrium of the propane-butane-sulfur system and described by the Peng-Robinson equation of state in combination with the Mukhopadhyay-Rao mixing rule. It is determined that the propane-butane mixture in the supercritical fluid (SCF) state not only has good extraction properties but also allows us to desulfurize commercial hydrocarbons. For example, reducing the pressure from 25 to 7 MPa makes it possible to decrease the sulfur content in the product by 50% in the 413 K isotherm and by a factor of 10 in the 443 K isotherm.
引用
收藏
页码：1482 / 1487
页数：6
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