Fig. 7. (a) Apparent first-order bimolecular ethanol dehydration rate constant (per H+, 373 K) and (b) activity coefficient ratio (χ = γEWn/γ‡) from eqn (7), as a function of H2O pressure on H-Al-Beta-F(2.0) (■), H-Al-TON (▲), H-Al-FAU (♦), H-Al-MFI ([black circle]), H-Al-AEI (□), H-Al-CHA (○), and HPW/Si-MCM-41 (
). Solid lines in (a) reflect regression of measured rate constants to eqn (7). Inset (a): dependence of k3K2K4–1 values on the largest included sphere diameter of zeolite pores (dLC). Inset (b): slopes of the data sets in (b) in the high water pressure limit, as a function of the channel undulation parameter (dPL/dLC). Solid lines in both insets are to guide the eye.
