Article pubs.acs.org/jced
Volumetric and Viscometric Properties of Alcohol Amines + Ethanol Binary Mixtures Qing Liu, Chunying Zhu,* Taotao Fu, and Youguang Ma* State Key Laboratory of Chemical Engineering, Collaborative Innovation Center of Chemical Science and Engineering, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300027, P. R. China S Supporting Information *
ABSTRACT: The densities and viscosities of four binary mixtures [1-amino-2-propanol + ethanol, N-(2-aminoethyl) ethanolamine + ethanol, 3-amino-1-propanol + ethanol, N-(2aminoethyl)-1,2-ethanediamine + ethanol] were measured at T = 293.15, 303.15, 313.15, and 323.15 K. The volumetric and viscometric properties, such as excess molar volume VE, partial molar volume V̅ , partial molar volume at infinite dilution V̅ ∞, apparent molar volume Vφ, viscosity deviation Δη, and activation energy for viscosity flow Ea, were calculated from the experimental densities and viscosities, respectively. The excess molar volume and viscosity deviation were correlated by the Redlich−Kister equation, and the volumetric and viscometric properties were analyzed on the basis of intermolecular interactions between alcohol amine and ethanol molecules. few studies13−15 on thermodynamic properties of alcohol amine in nonaqueous solution are available. The researches on volumetric and viscometric properties of 1-amino-2-propanol (MIPA) + ethanol, N-(2-aminoethyl) ethanolamine (AEEA) + ethanol, 3-amino-1-propanol (3-AP) + ethanol, and N-(2-aminoethyl)-1,2-ethanediamine (DETA) + ethanol have not yet been reported in the literature. In this work, the densities and viscosities for binary solutions of 1-amino-2-propanol (MIPA), N-(2-aminoethyl) ethanolamine (AEEA), 3-amino-1-propanol (3-AP), N-(2-aminoethyl)-1,2ethanediamine (DETA) in ethanol were measured at the temperature T = 293.15−323.15 K, and the volumetric and viscometric properties were calculated from the experimental data. The Redlich−Kister equation was used to correlate the excess molar volume and viscosity deviation.
1. INTRODUCTION The rapid industry development brings about increasing consumption of the energy from coal, oil, and other fossil fuels and accordingly leads to the excessive emission of CO2. In recent years, the greenhouse effect and global warming have received extensively social and environmental concerns. To reduce the emission of CO2, the capture and recycle of CO2 has become a prior and urgent task.1 Many researches2−6 have shown that alcohol amine solutions such as monoethanolamine (MEA), methyldiethanolamine (MDEA), and 1-amino-2-propanol (MIPA) aqueous solutions were a kind of highly efficient CO2 absorbents. Unfortunately, the traditional aqueous alcohol amine solutions lead to a lot of needless losses in industrial production, more energy for solvent regeneration, and more corrosion of equipment and pipes. Moreover, aqueous alcohol amines solutions are easy-degradation. To avoid the disadvantages, it is urgent to find new and effective solvents. Alcohol amine + alcohol solutions arouse more attention owing to the low boiling point and the low corrosiveness. They could effectively decrease energy consumption for solvent regeneration and contribute to a reduction of the overall cost in industry. Moreover, the introduction of additional hydroxyl from alcohol could increase the basicity of alcohol amine solution and thereby improve the CO2 loading capacity. As a comparative research, Rayer et al.7 investigated experimentally the CO2 absorption kinetics by N-(2-hydroxyethyl)ethylenediamine in aqueous and nonaqueous solutions using stopped-flow technique. The density and viscosity are important physical properties and thermodynamic data. The thermodynamic properties of multicomponent systems are some essential parameters for the design and optimization of chemical process. Although many studies on density and viscosity have been reported,8−12 only a © 2017 American Chemical Society
2. EXPERIMENTAL SECTION 2.1. Materials. The specifications of alcohol amines and ethanol used in this experiment are listed in Table 1, and they were used without further purification. 2.2. Density and Viscosity Measurements. All mixtures were prepared in the frosted conical flasks (50 mL specification) with ground-in glass stoppers by mass using an electronic balance (FA2204B, Shanghai Jingke, China) with an uncertainty of 10−4 g. The density was measured by a vibrating tube densimeter (Anton Paar DMA 4500 M, Austria) with a precision of 5 × 10−5 g·cm−3, and the temperature was controlled automatically with ±0.03 K. The instrument was calibrated by the Received: April 4, 2017 Accepted: July 28, 2017 Published: August 14, 2017 3261
DOI: 10.1021/acs.jced.7b00321 J. Chem. Eng. Data 2017, 62, 3261−3273
Journal of Chemical & Engineering Data
Article
Table 1. Specification of Studied Chemicals
a
chemical name
CAS No.
molar mass (g·mol−1)
mass fraction puritya
mass fraction of waterb
source
MIPA AEEA 3-AP DETA ethanol
78-96-6 111-41-1 156-87-6 111-40-0 64-17-5
75.11 104.15 75.11 103.17 46.07
>0.99 ≥0.99 ≥0.99 ≥0.99 ≥0.998
0.0017 0.0019 0.0014
