Hydrothermal Synthesis of ZSM-10 Zeolite

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

References

[1] Colin S., Cundy P., Cox A. The hydrothermal synthesis of zeolites: precursors, intermediates and reaction mechanism. Microporous and Mesoporous Materials, 2005, vol. 82, iss. 1-2, pp. 1–78. DOI: 10.1016/j.micromeso.2005.02.016

[2] Norby P. Hydrothermal conversion of zeolites: an in situ synchrotron X-ray powder diffraction study. Journal of the American Chemical Society, 1997, vol. 119, iss. 22, pp. 5215−5221. DOI: 10.1021/ja964245g

[3] Higgins J.B., Schmitt K.D. ZSM-10: synthesis and tetrahedral framework structure. Zeolites, 1996, vol. 16, iss. 4, pp. 236−244. DOI: 10.1016/0144-2449(95)00162-X

[4] Mamedova G.A. Hydrothermal synthesis of natrolite type zeolite in the natural system. Glass Physics and Chemistry, 2014, vol. 40, iss. 3, pp. 380–383. DOI: 10.1134/S1087659614030134

[5] Velichkina L.M., Korobitsyna L.L., Vosmerikov A.V., Radomskaya V.I. The synthesis and physicochemical and catalytic properties of SHS zeolites. Russian Journal of Physical Chemistry A, 2007, vol. 81, iss. 10, pp. 1618–1622. DOI: 10.1134/S0036024407100135

[6] Ramdas P., Cheeseman P.A., Deem M.W. A database of new zeolite-like materials. Phys. Chem. Chem. Phys., 2011, vol. 13, iss. 27, pp. 12407–12412. DOI: 10.1039/C0CP02255A

[7] Klyuntina A.B., Prokofyev V.Yu., Gordina N.E. Effect of hydrothermal crystallization conditions on synthesis and properties of zeolite. Izvestiya vuzov. Khimiya i Khim. Tekhnologiya [Russian Journal of Chemistry and Chemical Technology], 2013, vol. 56, no. 3, pp. 73–77 (in Russ.).

[8] Pomazkina O.I., Filatova E.G., Pozhidaev Yu.N. Adsorption of nickel (II) cations by natural zeolites. Protection of Metals and Physical Chemistry of Surfaces, 2014, vol. 50, iss. 3, pp. 312–316. DOI: 10.1134/S2070205114030113

[9] Johnson M., Osonnor D., Barnes P., Catlow C.R.A., et al. Cation exchange, dehydration and calculation in clinoptilolite: in situ X-ray diffraction and computer modeling. J. Phys. Chem., 2003, vol. 107, iss. 4, pp. 942–951. DOI: 10.1021/jp021672+

[10] Treacy M.M.J., Higgins J.B. Collection of simulated XRD powder patterns for zeolites. Elsevier, 2001. 388 p.