Adsorption of Binary Gas Mixtures on Graphite

Determining how a binary gas mixture approaches equilibrium in the presence of a sorbent can have important implications for applications adsorption to gas separation. To understand the behavior of binary gas mixtures we are studying how adsorption equilibrium is reached on a well characterized planar sorbent, exfoliated graphite. We have conducted a series of adsorption measurements of methane and nitrogen mixtures on exfoliated graphite at low temperatures. We will present results for different initial mixture compositions and different temperatures. We will present results on the how the pressure approaches equilibrium, and, on the composition of the mixture at equilibrium for the different conditions explored.