Preparation of the mesoporous zeolite Beta (mBeta)

Typically, 0.05 g NaCl and 0.15 g KCl were added into 2 mL distilled water and 14.4 g TEAOH solution. Afterwards, 3.9 g H₂SiO₃ was dissolved into the above mentioned solution and stirred at 313 K for 6 h. Next, the solution containing 0.033 g NaOH, 0.17 g NaAlO₂ and 2 mL distilled water was slowly added into the resultant solution and further stirred at 313 K for 6 h. Finally, 0.5 g CTAB solution was added into the obtained solution and further stirred at 353 K for 8 h. The obtained mixed solution was hydrothermally treated for 48 h at 423 K. Subsequently, the products were washed with distilled water and dried at 383 K for 12 h. The final product mBeta was obtained after calcinations at 823 K for 6 h to remove any organics.