Speed of Sound Measurements of 2-Methoxy-2-methylpropane in the Temperature Range of 293.15 and 673.15 K and for Pressures up to 10 MPa

Abstract

Ethers are usually used as gasoline additives, and now 2-methoxy-2-methylpropane (MTBE) is the most widely used fuel additive. The speed of sound in MTBE with a specified mass purity higher than 0.990 (GC) was measured by the Brillouin light scattering method in the temperature range of 293.15–673.15 K and for pressures up to 10 MPa, including saturated liquid/vapor, liquid, and supercritical fluid. The correlations for the speed of sound in saturated liquid/vapor and liquid were proposed by employing the experimental results. Comparing the calculated results with the experimental data, the average absolute deviations are 0.50% for saturated liquid, 0.20% for saturated vapor, and 0.24% for liquid. The tendency of speed of sound to temperature and pressure was also analyzed.

Speed of Sound Measurement in 1-Methoxy-2-propanol from (306.81 to 648.29) K and up to 10 MPa

“…There are two main traditional methods for measuring the speed of sound in fluids: the acoustic resonator method for gases and the ultrasonic pulse-echo method for liquids. − On account of its quick measuring procedure and contactless measurement for gases and liquids simultaneously, the Brillouin light scattering (BLS) method has been regarded as a promising method for measuring the speed of sound in fluids in recent years. Some researchers have applied the BLS method to measure the speed of sound in several kinds of fluids such as 2-methoxy-2-methylpropane, di-isopropyl ether, R227ea, and R365mfc. − …”