Table 1. Elemental compositions, micropore volumes, and H⁺ densities of H-Al-Beta-F and their dealuminated analogs.

Sample	Si/Al a	V micro b /cm3 g–1	H+/Al (NH4+) c	H+/Al (DTBP) d	H+ c /u.c.	V micro b (de-Al) e
Si-Beta-F	—	0.21	—	—	0	—
H-Al-Beta-F(2.0)	23	0.22	0.75	0.54	2.0	0.22
H-Al-Beta-F(1.4)	34	0.18	0.78	—	1.4	0.21
H-Al-Beta-F(1.2)	45	0.20	0.84	0.79	1.2	0.21
H-Al-Beta-F(0.78)	65	0.21	0.79	—	0.78	0.20
H-Al-Beta-F(0.57)	93	0.23	0.84	—	0.57	0.22
H-Al-Beta-F(0.16)	220	0.20	0.54	1.1	0.16	—
H-Al-Beta-F(0.11)	500	0.20	0.84	—	0.11	—
H-Al-Beta-OH(1.7)	40	0.23	1.1	0.38	1.7	—

^aDetermined by AAS.

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

^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).

^e“de-Al” reflects deAl-Beta samples generated by treatment of H-Al-Beta in 69% HNO₃ (353 K, 16 h).