Investigation of Volumetric Properties of Some Glycol Ethers Using a Simple Equation of State

Abstract

In this work, a simple equation of state (EoS) has been used to predict the density and other thermodynamic properties such as the isobaric expansion coefficient, α P , the isothermal compressibility, κ T , and the internal pressure, P i , of six glycol ethers including diethylene glycol monobutyl ether (DEGBE), propylene glycol propyl ether (PGPE), diethylene glycol monomethyl ether (DEGME), diethylene glycol monoethyl ether (DEGEE), triethylene glycol dimethyl ether (TriEGDME), and tetraethylene glycol dimethyl ether (TEGDME) at different temperatures and pressures. A comparison with literature experimental data has been made. Additionally, statistical parameters between experimental and calculated densities for the GMA EoS and four other EoSs (Soave-Redlich-Kwong, Peng-Robinson, Soave-RedlichKwong with volume translation, and Patel-Teja) indicate the superiority of the GMA EoS.

Modifying GMA equation of state for description of (P, ρ, T) relation of gas and liquids over an extended pressure range

“…Goharshadi et al verified this regularity for many liquids and obtained very accurate calculation of liquid density at low and high pressure [5][6][7][8][9][10]. The A and B parameters are determined by correlating experimental data in the form of Eq.…”

“…(3) and differentiating, we obtain (4) where the D i (T) are temperature dependent. Since Exact thermodynamic relation P=T(∂p/∂T) ρ −(∂u/∂v) T can be written as (7) Therefore, (8) d(ρ) has been arbitrarily chosen as the following function as ρ=0 at limit of P=0 d(ρ)=eρ+fρ 2 +gρ 3 +hρ 4 (9) Inserting Eq. (9) in Eq.…”

“…This EOS assumes that (Z−1)v 2 is a linear function of 1/ρ at constant temperature. Recently, a new isotherm regularity based EOS was derived by Goharshadi et al, which is named GMA EOS [5][6][7][8][9][10]. GMA EOS is an excellent equation for density calculation of liquids at low and high pressures.…”

Isobaric vapour–liquid equilibria of binary 1-propoxy-2-propanol mixtures with water and alcohols at reduced pressure

“…Some investigations cover the volumetric properties of glycol ethers, both with experimental results and calculations [8,9], the thermophysical and health-related characteristics like cytotoxicity, eye-irritancy and biodegradability [10] or microscopic structures of binary water/PGAE mixtures [11]. Upon the feature that PGAE as well as C i EO j are amphiphilic molecules, combining characteristic properties of organic solvents (volatility and solubilization of organics) with those of surfactants (surface activity, formation of emulsions, microemulsions and similar structures), they are considered as hydrotropes or solvo-surfactants.…”

Prediction of Thermodynamic Properties of Liquid Air

“…A new equation of state (EoS) for liquids has been recently introduced by Goharshadi et al [12] (Goharshadi-Morsali-Abbaspour "GMA EoS") which has been found to be valid for polar, nonpolar, and hydrogen-bonded fluids [12][13][14][15]. The EoS has also been applied for liquid mixtures [16,17].…”