Thermophysical Properties of 1-Butanol at High Pressures

Marzena Dzida

doi:10.3390/en13195046

Abstract

1-Butanol can be considered as a good fuel additive, which can be used at high pressures. Therefore, the knowledge of high-pressure thermophysical properties is crucial for this application. In this paper, new experimental data on the speed of sound in 1-butanol in the temperature range from 293 to 318 K and at pressures up to 101 MPa are reported. The speed of sound at a frequency of 2 MHz was measured at atmospheric and high pressures using two measuring sets operating on the principle of the pulse–echo–overlap method. The measurement uncertainties were estimated to be better than ±0.5 m·s−1 and ± 1 m·s−1 at atmospheric and high pressures, respectively. Additionally, the density was measured under atmospheric pressure in the temperature range from 293 to 318 K using a vibrating tube densimeter Anton Paar DMA 5000. Using the experimental results, the density and isobaric and isochoric heat capacities, isentropic and isothermal compressibilities, isobaric thermal expansion, and internal pressure were calculated at temperatures from 293 to 318 K and at pressures up to 100 MPa.

Highlights

1-Butanol can be considered as a good fuel additive, which can be used at high pressures
Much attention has been paid to the use of 1-butanol as a fuel. 1-Butanol can be used as an additive for gasoline, diesel, and kerosene or as an alternative fuel [1,2,3,4]
Studies show that the use of 1-butanol for this purpose is much more advantageous than the use of ethanol. 1-Butanol has higher energy density, lower than ethanol vapor pressure and improved miscibility with gasoline, lower solubility in water and it is less corrosive than ethanol [2,5,6]

Summary

Introduction

1-Butanol can be considered as a good fuel additive, which can be used at high pressures. New experimental data on the speed of sound in 1-butanol in the temperature range from 293 to 318 K and at pressures up to 101 MPa are reported. The density was measured under atmospheric pressure in the temperature range from 293 to 318 K using a vibrating tube densimeter Anton Paar DMA 5000. 1-Butanol has higher energy density, lower than ethanol vapor pressure and improved miscibility with gasoline, lower solubility in water and it is less corrosive than ethanol [2,5,6]. Yeast (for example, Sacharomyces cerevisiae [8]) and Escherichia coli, one of the major bacteria in the human gut, are believed to be grown on an industrial scale [7]

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