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Hydrothermal Synthesis of ZSM-10 Zeolite

Authors: Mamedova G.A. Published: 28.09.2018
Published in issue: #5(80)/2018  
DOI: 10.18698/1812-3368-2018-5-125-133

 
Category: Chemistry | Chapter: Bioorganic Chemistry  
Keywords: hydrothermal synthesis, ZSM-10 zeolite, dehydration/rehydration, Nakhchivan zeolite, thermal solution

We synthesised potassium-containing ZSM-10 zeolite from natural Nakhchivan zeolite. The natural sample comes from a zeolite horizon to the north-west of Kyukyuchay river, featuring approximately 75...80 % zeolite content. We sampled Nakhchivan zeolite tuffs containing 78.5 % mordenite (as the primary mineral), 19.5 % quartz and 2.0 % anorthite. We conducted hydrothermal treatment in an aqueous solution of KOH in an 18 cm3 Morey autoclave with a fill factor of 0.8. The optimum conditions for obtaining the ZSM-10 zeolite are as follows: a temperature of 100 °C, 1 N concentration of the KOH thermal solution, 7-day treatment time. We studied the original sample and the reaction product using the methods of radiography, thermal analysis, infrared spectroscopy and elemental analysis. We conducted the hydrothermal synthesis in moderate conditions, without additional components or organic media, and in 7 days we transformed natural Nakhchivan zeolite into the ZSM-10 zeolite with a high degree of crystallinity. According to the radiography data, the ZSM-10 zeolite belongs to the hexagonal crystal family with the following parameter values: a=31.39 Å, c=7.51 Å. The elemental analysis yielded the empirical formula of the ZSM-10 zeolite. The investigation determined that this zeolite rehydrates completely in 48 hours and may be used as a catalyst or an adsorbent

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