Stabilitas Zeolit HY Hidrofobik terhadap Uji Hot Liquid Water (HLW)
DOI:
https://doi.org/10.32734/jtk.v10i2.6250Keywords:
hydrophobicity, HY zeolite, organosilane, hot liquid waterAbstract
Initially, zeolite catalysts cannot be used for reactions involving hot liquid water, so it is necessary to modify the zeolite to be stable under these conditions. The synthesis of HY and hydrophobic zeolites aimed to determine the stability of zeolite in hot liquid water (HLW). The stability of zeolite in HLW is related to zeolite hydrophobicity. In this study, the main raw materials for the synthesis of HY zeolite were sodium aluminate (NaAlO2) and Ludox HS-40 by calcining the product at 350 oC for 1 hour. Furthermore, increasing the hydrophobicity of HY zeolite was carried out by modifying the external zeolite surface using organosilanes (aminopropyltriethoxysilane). The stability of two zeolites in HLW was set at 200 oC. Zeolite analysis used physical test and Fourier Transform-Infra Red (FTIR) Spectrometer. The results of the zeolite distribution in two phases confirmed that HY zeolite was completely dispersed in the water phase, while the zeolite one was dispersed in the organic phase. Moreover, the IR spectra of HY zeolite showed that the wide peak detection at wave number 720 cm-1 for beginning to disappear. This means that the HLW condition could be damaged to the d6r unit. Another result was shown by hydrophobic zeolite spectra with a stable peak for 72 hours. This indicates that the hydrophobic zeolite has thermal stability in HLW so that it can be used in chemical reaction catalytic applications that use on phase.
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References
M. Ghiaci, R. Kia, A. Abbaspur, and F. Seyedeyn-Azad, “Adsorption of chromate by surfactant-modified zeolites and MCM-41 molecular sieve,†Sep. Purif. Technol., vol. 40, no. 3, pp. 285–295, 2004.
D. Barlokova, “Natural Zeolites in the Water Treatment Process,†Slovak J. Civ. Eng., pp. 8–12, 2008.
F. M. Mahaddilla and A. Putra, “Pemanfaatan Batu Apung sebagai Sumber Silika Dalam Pembuatan Zeolit Sintetis,†J. Fis. Unand, vol. 2, pp. 262–268, 2013.
Z. Wang, I. Kumakiri, K. Tanaka, X. Chen, and H. Kita, “NaY zeolite membranes with high performance prepared by a variable-temperature synthesis,†Microporous Mesoporous Mater., vol. 182, pp. 250–258, 2013.
P. Guo, N. Yan, L. Wang, and X. Zou, “Database mining of zeolite structures,†Cryst. Growth Des., vol. 17, no. 12, pp. 6821–6835, 2017.
N. R. Shiju and V. V. Guliants, “Recent developments in catalysis using nanostructured materials,†Appl. Catal. A Gen., vol. 356, no. 1, pp. 1–17, 2009.
Y.-T. Cheng, Z. Wang, C. J. Gilbert, W. Fan, and G. W. Huber, “ Production of p -Xylene from Biomass by Catalytic Fast Pyrolysis Using ZSM-5 Catalysts with Reduced Pore Openings ,†Angew. Chemie, vol. 124, no. 44, pp. 11259–11262, 2012.
P. A. Zapata, J. Faria, M. P. Ruiz, R. E. Jentoft, and D. E. Resasco, “Hydrophobic Zeolites for Biofuel Upgrading Reactions at the Liquid–Liquid Interface in Water/Oil Emulsions,†J. Am. Chem. Soc., vol. 134, no. 20, pp. 8570–8578, May 2012.
L. Zhang, K. Chen, B. Chen, J. L. White, and D. E. Resasco, “Factors that Determine Zeolite Stability in Hot Liquid Water,†J. Am. Chem. Soc., vol. 137, no. 36, pp. 11810–11819, 2015.
Y. Román-Leshkov, J. N. Chheda, and J. A. Dumesic, “Phase modifiers promote efficient production of hydroxymethylfurfural from fructose,†Science (80-. )., vol. 312, no. 5782, pp. 1933–1937, 2006.
C. Luo, S. Wang, and H. Liu, “Cellulose conversion into polyols catalyzed by reversibly formed acids and supported ruthenium clusters in hot water,†Angew. Chemie - Int. Ed., vol. 46, no. 40, pp. 7636–7639, 2007.
H. Xiong, H. N. Pham, and A. K. Datye, “Hydrothermally stable heterogeneous catalysts for conversion of biorenewables,†Green Chem., vol. 16, no. 11, pp. 4627–4643, 2014.
S. Eckstein, P. H. Hintermeier, M. V. Olarte, Y. Liu, E. Baráth, and J. A. Lercher, “Elementary steps and reaction pathways in the aqueous phase alkylation of phenol with ethanol,†J. Catal., vol. 352, pp. 329–336, Aug. 2017.
Y. Han, C. Liu, J. Horita, and W. Yan, “Trichloroethene hydrodechlorination by Pd-Fe bimetallic nanoparticles: Solute-induced catalyst deactivation analyzed by carbon isotope fractionation,†Appl. Catal. B Environ., vol. 188, pp. 77–86, Jul. 2016.
R. M. Ravenelle, J. R. Copeland, W. G. Kim, J. C. Crittenden, and C. Sievers, “Structural Changes of γ-Al2O3-Supported Catalysts in Hot Liquid Water,†ACS Catal., vol. 1, no. 5, pp. 552–561, 2011.
S. Namba, N. Hosonuma, and T. Yashima, “Catalytic application of hydrophobic properties of high-silica zeolites. I. Hydrolysis of ethyl acetate in aqueous solution,†J. Catal., vol. 72, no. 1, pp. 16–20, 1981.
S. Prodinger, M. A. Derewinski, A. Vjunov, S. D. Burton, I. Arslan, and J. A. Lercher, “Improving Stability of Zeolites in Aqueous Phase via Selective Removal of Structural Defects,†J. Am. Chem. Soc., vol. 138, no. 13, pp. 4408–4415, Apr. 2016.
U. Khalil, O. Muraza, and A. Al-Amer, “Development of surface modified mordenite catalysts and their stability in hot liquid water,†Adv. Powder Technol., vol. 27, no. 4, pp. 1404–1410, 2016.
R. Silverstein, G. Bassler, and T. Morrill, “No Title,†in Spectrometric Identification of Organic Compounds, 4th ed., New York: Wiley, 1981.
A. Miecznikowski and J. Hanuza, “Infrared and Raman studies of ZSM-5 and silicalite-1 at room, liquid nitrogen and helium temperatures,†Zeolites, vol. 7, no. 3, pp. 249–254, 1987.
R. M. Ravenelle et al., “Stability of zeolites in hot liquid water,†J. Phys. Chem. C, vol. 114, no. 46, pp. 19582–19595, 2010.
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