2024/07/15 by Serra Leal, Juan Sebastian, Incer-Valverde, Jimena, Morosuk, Tatiana
#600 Technik #Medizin #angewandte Wissenschaften::660 Chemische Verfahrenstechnik::660 Chemische Verfahrenstechnik #demand #extraction #helium #production
paper · doi:10.14279/depositonce-20285
Helium is an inert gas with no color or odor. Its critical point is −268 °C and 2.27 bar, its boiling point is −269 °C (4 K), and it remains in a liquid state at pressures below 2.5 bar. Under standard conditions, helium behaves as an ideal gas, with a density of 179 g/m3, a specific heat capacity of 5.238 kJ/(kg K), and a thermal conductivity of 0.143 W/(m K). The specific heat of vaporization of helium is 0.084 kJ/mol. The two significant isotopes are He-4, naturally abundant at 99.99%, and He-3 (0.000137%). Both isotopes are stable, with a density of 0.1785 kg/m3 at 298 K [1]. Helium was first produced in 1895 through the addition of acid to uranium, which led to the isolation of the resulting gas. Later, in 1905, helium was identified within natural gas.