Table 4.

Textural characteristic results of the B2-ZSM-5 with respect to synthesis time.

Time (day)	SBET (m2/g)	S(a)mic (m2/g)	SEXT (m2/g)	SEXT/SBET	V(b)total (cm3/g)	t-plot V(c)micro (cm3/g)	V(d)mesa (cm3/g)	Vmeso/Vtotal
7	508	18	490	0.96	0.55	0.01	0.54	0.98
10	448	189	259	0.58	0.39	0.09	0.30	0.77
14	395	268	127	0.32	0.27	0.13	0.14	0.52

a: S_mic = t-plot surface area, S_EXT = S_BET -S_mic b: V_total = Total pore volume determined from the adsorbed amount at P/Po= 0.984 c: t-plot V_micro = Micropore volume calculated using t-plot method d: V_meso = V_total- t-plot V_micro