X-ray diffraction (XRD) patterns of H-ZSM-5 zeolites were
recorded on a Rigaku RINT2400 diffractometer using Cu-K radiation.
Quantitative measurements of the Si/Al ratio were performed
using inductively coupled plasma-atomic emission spectroscopy
(ICP-AES) using a Rigaku JY 38S spectrometer.
Before the measurements,
the prepared zeolites were dissolved in HF solution. The
N2 adsorption measurements were carried out at 77K on a Coulter
SA3100