The manometric–chromatographic equi

The manometric–chromatographic equipment is a powerful method to determine pure component and binary adsorption equilibrium. In this equipment there is a compromise between the pressure range and the pressure accuracy in the low-pressure range. The Henry constant is obtained as H 5q/P. In the measurement of the pressure we have an error of 0.5 kPa, which in measurements of pressures around 2 kPa translates an error of 75% in the estimation of the Henry constant. To avoid a poor extrapolation of the Henry constant from the manometric data, breakthrough curves were measured using a 1% concentration of hydrocarbon, which can be considered in the linear zone of the isotherm and gives a reliable value of the Henry constant needed to predict the binary equilibrium with confidence [44].