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

Table 3

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)
P	10	0.21	0.13	329	50
A1	11	0.24	0.13	329	54
B1	12	0.25	0.12	332	59
C1	12	0.28	0.12	335	75
D1	10	0.29	0.11	342	100
C1.5	11	0.31	0.12	330	65
B2	10	0.32	0.13	349	74
C2	11	0.36	0.12	352	89
DesNaOH	9	0.24	0.13	325	54

^aAtomic absorption spectroscopy. Average value over three independent measurements with a coefficient of variation below 0.5%. ^bVolume adsorbed at P/P° = 0.99. ^cMicropore volume (V_micro) and mesoporous surface area S_meso by t-plot with a coefficient of variation below 2%. ^dTotal surface area by Brunauer–Emmett–Teller’s method with a coefficient of variation below 3%.