Hierarchical Low Si/Al Ratio Ferrierite Zeolite by Sequential Postsynthesis Treatment: Catalytic Assessment in Dehydration Reaction of Methanol

Table 4

Chemical and textural properties of investigated samples.

Sample	Si/Al^a (mol/mol)	Vpore^b (cm^3/g)	Vmicro^c (cm^3/g)	SBET^d (m^2/g)	Smeso^c (m^2/g)
Parent	10	0.21	0.13	329	50
SA	5	0.52	0.04	324	230
SA-HCl	15	0.26	0.12	330	71
SA-HCl-NaOH	11	0.28	0.10	338	100
D1	10	0.29	0.12	342	100

^aAtomic absorption spectroscopy. ^bVolume adsorbed at P/P° = 0.99. ^cMicropore volume (V_micro) and mesoporous surface area S_meso by t-plot. ^dTotal surface area by Brunauer–Emmett–Teller’s method.