Fig. 4. The proposed route for ethene formation from intermediate C over AlOH/HZSM-5 and Al(OH)3/HSSZ-13 (see Scheme S2†). The Gibbs free energy barriers (ΔGact, in kcal mol–1) for each elementary step at 573 K have been listed (D, represents the protonated ethanol; E, represents the protonated CH3CH2OCH3; F, represents CH3CH2O+(CH3)2 oxonium).
