H2S Viscosities and Densities at High-Temperatures and Pressures

New high-pressure and high-temperature viscosity and density values for pure H2S were measured using a Cambridge oscillating piston viscometer and an Anton Paar vibrating tube densimeter, respectively Viscosities and densities were measured for temperatures from T = 273 K to 423 K, and pressures up to p = 100 MPa covering the sub- and supercritical region. Within the low density region, our values for densities match reasonably well with the existing literature data, and within our estimated error of ±1.2 kg m~3, whereas beyond supercritical density (pc= 347.28 kg m3), the data showed a larger deviation, of about ±10 kg nr3. However, the deviation of such magnitude also discussed in the reports by other groups with respect to the high density region. Our viscosity data also compared well with the existing experimental data that are limited to low pressure region. Though the performance of a recent reference viscosity model proposed by Schmidt et al. [1] was capable of estimating the viscosities of H2S within an A AD of about 5% in relation to our measured data for all conditions, it generally over-predicted our data, with a deviation as large as +15%. For this study, a simple empirical model that correlates viscosity with the density is proposed. This viscosity correlation can estimate viscosities of pure H2S within an A AD below 5% for A = 220 - 483 K and p = 0.1 to 100 MPa.