Study of the adsorptional properties and secondary porous structure of adsorbents with a molecular sieve action

Adsorption Equilibrium of Carbon Dioxide, Methane, Nitrogen, Carbon Monoxide, and Hydrogen on UiO-66(Zr)_(COOH)2

“…V s is the volume of the solid adsorbent, V c is the volume of inert parts, and ρ g is the density of the gas under measurement conditions. The adsorbed phase density ( ρ l ) can be calculated from the molar mass ( M ) and the molar volume (υ), as presented in eq . The molar volume (υ) can be estimated from several semiempirical methods, some of them temperature-dependent . In this work, it was assumed that below the critical temperature, the molar volume can be determined by eq . T c and T b (K) are the critical and boiling-point temperatures, respectively, and υ b (cm 3 mol –1 ) and b (cm 3 mol –1 ) are the molar volume at T b and the van der Waal’s volume, respectively.…”

“…However, above the critical temperature, υ is assumed to be equal to the van der Waal’s volume (eq ). , More details about the buoyancy effect correction methodology and molar volume estimation can be found elsewhere. ,− …”

“…The molar volume (υ) can be estimated from several semiempirical methods, some of them temperature-dependent. 16 In this work, it was assumed that below the critical temperature, the molar volume can be determined by eq 3.…”