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. 2015 Sep 11;5:13981. doi: 10.1038/srep13981

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(a) Adsorption isotherms of CH₄ at 20 °C on 5A zeolite (solid black line), 5A zeolite with pre-adsorbed 2-propanol (), and 5A-Zeolite-30 with pre-adsorbed 2-propanol (■). Error bar shows standard deviation of triplicate measurements. (b) CH₄ adsorption kinetics on 5A zeolite (solid black line), 5A-Zeolite-30 (dash red line), 5A-Zeolite-30 pre-adsorbed with 2,2-dimethyl butane (dot green line), and 5A-Zeolite-30 pre-adsorbed with 2-propanol (dot yellow line); M_t is adsorbed amount of CH₄ at time t, and M_∞ is adsorbed amount at equilibrium.

Inline graphic — (a) Adsorption isotherms of CH₄ at 20 °C on 5A zeolite (solid black line), 5A zeolite with pre-adsorbed 2-propanol (), and 5A-Zeolite-30 with pre-adsorbed 2-propanol (■). Error bar shows standard deviation of triplicate measurements. (b) CH₄ adsorption kinetics on 5A zeolite (solid black line), 5A-Zeolite-30 (dash red line), 5A-Zeolite-30 pre-adsorbed with 2,2-dimethyl butane (dot green line), and 5A-Zeolite-30 pre-adsorbed with 2-propanol (dot yellow line); M_t is adsorbed amount of CH₄ at time t, and M_∞ is adsorbed amount at equilibrium.