Table 2. Elemental compositions, micropore volumes, H⁺ densities, and topological descriptors of Brønsted acidic solids.

Sample	Si/Al a	V micro b /cm3 g–1	H+/Al (NH4+) c	H+/Al (DTBP) d	d PL e /nm	d LC f /nm	Undulation parameter g
H-Al-CHA	15	0.21 h	0.98	—	0.372	0.737	0.505
H-Al-AEI	9.5	0.20 h	0.85	—	0.384	0.733	0.524
H-Al-FAU	56	0.30	0.35	0.88	0.735	1.124	0.654
H-Al-MFI	43	0.13	0.85	—	0.470	0.636	0.739
H-Al-TON	43	0.05	0.77	—	0.511	0.571	0.895
H-Al-Beta-F(2.0)	23	0.22	0.75	0.54	0.595	0.668	0.891
HPW/Si-MCM-41	11 i	—	—	1.6 j	3.8 k	3.8 k	1.0

^aDetermined by AAS.

^bDetermined by N₂ adsorption minimum in ∂V_ads/∂ log(P/P₀).

^cDetermined by TPD of NH₃ after aqueous-phase ion exchange with 1 M NH₄NO₃, 24 h, 353 K.

^dDetermined by in situ 2,6-di-tert-butylpyridine titration during ethanol dehydration catalysis (378 K, 5 kPa C₂H₅OH, 1 kPa H₂O).

^ePore-limiting diameter.119

^fDiameter of largest included sphere.119

^gUndulation parameter = d_PL/d_LC.

^hDetermined by Ar adsorption minimum in ∂V_ads/∂ log(P/P₀).

ⁱW/P ratio quantified by ICP.

^jH⁺/POM.

^kAverage of pore-size distribution determined by N₂ adsorption isotherm and NLDFT (Fig. S30, ESI).