Y zeolites have moderate microporous pore size, large specific surface area, and good hydrothermal stability, which were widely used in industrial adsorption of volatile organic compounds (VOCs), but the performance of Y zeolites in adsorption of VOCs under high humidity conditions is terrible. In this paper, Y zeolites with different silica-alumina ratios were hydrophobically modified by organosilane and characterized by XRD, FTIR, SEM, BET, NMR. In the experiments of static and dynamic adsorption of VOCs by modified Y zeolites, it can be concluded that the static water adsorption capacity of Y zeolites with silica-aluminum ratio of 5 and 40 after silica modification decreased by 62 wt% and 53 wt%, under the conditions of high humidity, GHSV = 15,000 h-1, T = 35°C and initial concentration of toluene C0 = 5000 mg·m-3. The saturation adsorption capacity of toluene was increased from 0.06 g·g-1, 0.09 g·g-1 to 0.15 g·g-1, 0.21 g·g-1, the adsorption selectivity of Y zeolites for water was reduced and that for toluene was increased after Vapor phase silanization overlay modification. The present modification method might carry out targeted modification of zeolites surface, provide research ideas and guidance under high humidity conditions.
References
[1]
Meng, X.J. and Xiao, F.S. (2014) Green Routes for Synthesis of Zeolites. Chemical Reviews, 114, 1521-1543. https://doi.org/10.1021/cr4001513
[2]
Hosseini, M., Zanjanchi, M.A., Ghalami-Choobar, B. and Golmojdeh, H. (2015) Ultrasound-Assisted Dealumination of Zeolite Y. Journal of Chemical Sciences, 127, 25-31. https://doi.org/10.1007/s12039-014-0745-2
[3]
Jal, P.K., Patel, S. and Mishra, B.K. (2004) Chemical Modification of silica Surface by Immobilization of Functional Groups for Extractive Concentration of Metal Ions. Talanta, 62, 1005-1028. https://doi.org/10.1016/j.talanta.2003.10.028
[4]
Zheng, H.M., Zhao, L. and Yang, Q. (2016) Insight into the Adsorption Mechanism of Benzene in HY Zeolites: The Effect of Loading. RSC Advances, 6, 34175-34187. https://doi.org/10.1039/C6RA02338J
[5]
Kimura, T., Suzuki, M., Maeda, M. and Tomura, S. (2006) Water Adsorption Behavior of Ordered Mesoporous Silicas Modified with an Organosilane Composed of Hydrophobic Alkyl Chain and Hydrophilic Polyethylene Oxide Groups. Microporous and Mesoporous Materials, 95, 213-219. https://doi.org/10.1016/j.micromeso.2006.05.027
[6]
Gola, A., et al. (2000) Effect of Leaching Agent in the Dealumination of Stabilized Y Zeolites. Microporous and Mesoporous Materials, 40, 73-83. https://doi.org/10.1016/S1387-1811(00)00243-2
[7]
Kuwahara, Y., Kamegawa, T., Mori, K. and Yamashita, H. (2008) Fabrication of Hydrophobic Zeolites Using Triethoxyfluorosilane and Their Application as Supports for TiO2 Photocatalysts. Chemical Communications, No. 39, 4783-4785. https://doi.org/10.1039/b810053e
[8]
Baek, S.W., Kim, J.R. and Ihm, S.K. (2004) Design of Dual Functional Adsorbent/Catalyst System for the Control of VOC’s by Using Metal-Loaded Hydrophobic Y-Zeolites. Catalysis Today, 93, 575-581. https://doi.org/10.1016/j.cattod.2004.06.107
[9]
Parmar, G.R. and Rao, N.N. (2009) Emerging Control Technologies for Volatile Organic Compounds. Critical Reviews in Environmental Science and Technology, 39, 41-78. https://doi.org/10.1080/10643380701413658
[10]
Ye, QQ., Chen, Y.Y., Li, Y.Z., Jin, R.B., Geng, Q. and Chen, S. (2023) Management of Typical VOCs in Air with Adsorbents: Status and Challenges. Dalton Transactions, 52, 12169-12184. https://doi.org/10.1039/D3DT01930F
[11]
Meininghaus, C.K. and Prins, R. (2000) Sorption of Volatile Organic Compounds on Hydrophobic Zeolites. Microporous and Mesoporous Materials, 35, 349-365. https://doi.org/10.1016/S1387-1811(99)00233-4
[12]
Serrano, D.P., Calleja, G., Botas, J.A. and Gutierrez, F.J. (2004) Adsorption and Hydrophobic Properties of Mesostructured MCM-41 and SBA-15 Materials for Volatile Organic Compound Removal. Industrial & Engineering Chemistry Research, 43, 7010-7018. https://doi.org/10.1021/ie040108d
[13]
Serrano, D.P., Calleja, G., Botas, J.A. and Gutierrez, F.J. (2007) Characterization of Adsorptive and Hydrophobic Properties of Silicalite-1, ZSM-5, TS-1 and β Zeolites by TPD Techniques. Separation and Purification Technology, 54, 1-9. https://doi.org/10.1016/j.seppur.2006.08.013
[14]
Stelzer, J., Paulus, M., Hunger, M. and Weitkamp, J. (1998) Hydrophobic Properties of All-Silica Zeolite β. Microporous and Mesoporous Materials, 22, 1-8. https://doi.org/10.1016/S1387-1811(98)00071-7
[15]
Martucci, A., et al. (2015) Influence of Water on the Retention of Methyl Tertiary-Butyl Ether by High Silica ZSM-5 and Y Zeolites: A Multidisciplinary Study on the Adsorption from Liquid and Gas Phase. RSC Advances, 5, 86997-87006. https://doi.org/10.1039/C5RA15201A
[16]
Han, X., Wang, L., Li, J., Zhan, X., Chen, J. and Yang, J. (2011) Tuning the Hydrophobicity of ZSM-5 Zeolites by Surface Silanization Using Alkyltrichlorosilane. Applied Surface Science, 257, 9525-9531. https://doi.org/10.1016/j.apsusc.2011.06.054
[17]
Zhao, X.S. and Lu, G.Q. (1998) Modification of MCM-41 by Surface Silylation with Trimethylchlorosilane and Adsorption Study. The Journal of Physical Chemistry B, 102, 1556-1561. https://doi.org/10.1021/jp972788m
[18]
Kim, K.J. and Ahn, H.G. (2012) The Effect of Pore Structure of Zeolite on the Adsorption of VOCs and Their Desorption Properties by Microwave Heating. Microporous and Mesoporous Materials, 152, 78-83. https://doi.org/10.1016/j.micromeso.2011.11.051
[19]
Hung, C., Bai, H. and Karthik, M. (2009) Ordered Mesoporous Silica Particles and Si-MCM-41 for the Adsorption of Acetone: A Comparative Study. Separation and Purification Technolo-gy, 64, 265-272. https://doi.org/10.1016/j.seppur.2008.10.020
[20]
Pasti, L., Martucci, A., Nassi, M., Cavazzini, A., Alberti, A. and Bagatin, R. (2012) The Role of Water in DCE Adsorption from Aqueous Solutions onto Hydrophobic Zeolites. Microporous and Mesoporous Materials, 1600, 182-193. https://doi.org/10.1016/j.micromeso.2012.05.015
[21]
Yu, Y., Zheng, L. and Wang, J. (2012) Adsorption Behavior of Toluene on Modified 1X Molecular Sieves. Journal of the Air & Waste Management Association, 62, 1227-1232. https://doi.org/10.1080/10962247.2012.702186
[22]
Martucci, A., Braschi, I., Bisio, C., Sarti, E., Rodeghero, E., Bagatin, R. and Pasti, L. (2015) Influence of Water on the Retention of Methyl Tertiary-Butyl Ether by High Silica ZSM-5 and Y Zeolites: A Multidisciplinary Study on the Adsorption from Liquid and Gas Phase. RSC Advances, 106, 86997-87006. https://doi.org/10.1039/C5RA15201A
[23]
Halasz, I., Kim, S. and Marcus, B. (2002) Hydrophilic and Hydrophobic Adsorption on Y Zeolites. Molecular Physics, 19, 3123-3132. https://doi.org/10.1080/00268970210133198
[24]
Dabbawala, A.A., Reddy, K.S.K., Mittal, H., Al Wahedi, Y., Vaithilingam, B.V., Karanikolos, G.N., Singaravel, G., Morin, S., Berthod, M. and Alhassan, S.M. (2021) Water Vapor Adsorption on Metal-Exchanged Hierarchical Porous Zeolite-Y. Microporous and Mesoporous Materials, 326, Article ID: 111380. https://doi.org/10.1016/j.micromeso.2021.111380
[25]
Jin, W. and Zhu, S. (2000) Study of Adsorption Equilibrium and Dynamics of Benzene, Toluene, and Xylene on Zeolite NaY. Chemical Engineering & Technology, 23, 151-156.
[26]
Zhu, J., Trefiak, N., Woo, T. and Huang, Y. (2008) An Investigation of the Adsorption of Aromatic Hydrocarbons in Zeolite Na-Y by Solid-State NMR Spectroscopy. Microporous and Mesoporous Materials, 114, 474-484. https://doi.org/10.1016/j.micromeso.2008.01.035
[27]
Zhu, J., Mosey, N., Woo, T. and Huang, Y. (2007) Study of the Adsorption of Toluene in Zeolite LiNa-Y by Solid-State NMR Spectroscopy. The Journal of Physical Chemistry C, 111, 13427-13436. https://doi.org/10.1021/jp0706275
[28]
Canet, X., Gilles, F., Su, B.L., de Weireld, G., Frère, M. and Mougin, P. (2007) Adsorption of Alkanes and Aromatic Compounds on Various Faujasites in the Henry Domain. 2. Composition Effect in X and Y Zeolites. Journal of Chemical & Engineering Data, 52, 2127-2137. https://doi.org/10.1021/je700214v
[29]
Kondor, A. and Dallos, A. (2014) Adsorption Isotherms of Some Alkyl Aromatic Hydrocarbons and Surface Energies on Partially Dealuminated Y Faujasite Zeolite by Inverse Gas Chromatography. Journal of Chromatography A, 1362, 250-261. https://doi.org/10.1016/j.chroma.2014.08.047
[30]
Rungsirisakun, R., Nanok, T., Probst, M. and Limtrakul, J. (2006) Adsorption and Diffusion of Benzene in the Nanoporous Catalysts FAU, ZSM-5 and MCM-22: A Molecular Dynamics Study. Journal of Molecular Graphics and Modelling, 24, 373-382. https://doi.org/10.1016/j.jmgm.2005.10.003
[31]
Plant, D.F., Maurin, G. and Bell, R.G. (2007) Diffusion of Methanol in Zeolite NaY: A Molecular Dynamics Study. The Journal of Physical Chemistry B, 111, 2836-2844. https://doi.org/10.1021/jp0674524
[32]
Smit, B. and Maesen, T.L. (2008) Molecular Simulations of Zeolites: Adsorption, Diffusion, and Shape Selectivity. Chemical Reviews, 108, 4125-4184. https://doi.org/10.1021/cr8002642
[33]
Zheng, S., Tanaka, H., Jentys, A. and Lercher, J.A. (2004) Novel Model Explaining Toluene Diffusion in HZSM-5 after Surface Modification. The Journal of Physical Chemistry B, 108, 1337-1343. https://doi.org/10.1021/jp034477j
[34]
Malka-Edery, A. and Grenier, P. (2001) Diffusion of Benzene in NaX Zeolite, Studied by Thermal Frequency Response. The Journal of Physical Chemistry B, 105, 6853-6857. https://doi.org/10.1021/jp004025w
[35]
Takeuchi, M., Hidaka, M. and Anpo, M. (2014) Simple Evaluation of the Adsorption States of Benzene Molecule on the Hydroxyl, H+ and Na+ Sites of Y-Zeolite Surfaces by Using UV Absorption Spectroscopy. Research on Chemical Intermediates, 40, 2315-2325. https://doi.org/10.1007/s11164-014-1608-7
[36]
Halasz, I., Kim, S. and Marcus, B. (2002) Hydrophilic and Hydrophobic Adsorption on Y Zeolites. Molecular Physics, 100, 3123-3132. https://doi.org/10.1080/00268970210133198
[37]
Chaouati, N., Soualah, A. and Chater, M. (2013) Adsorption of Phenol from Aqueous Solution onto Zeolites Y Modified by Silylation. Comptes Rendus Chimie, 16, 222-228. https://doi.org/10.1016/j.crci.2012.10.010
[38]
Tsai, W.T., Hsu, H.C., Su, T.Y., Lin, K.Y. and Lin, C.M. (2006) Adsorption Characteristics of Bisphenol-A in Aqueous Solutions onto Hydrophobic Zeolite. Journal of Colloid and Interface Science, 299, 513-519. https://doi.org/10.1016/j.jcis.2006.02.034
[39]
Guillemot, M., Mijoin, J., Mignard, S. and Magnoux, P. (2008) Adsorption of Tetrachloroethylene (PCE) in Gas Phase on Zeolites of Faujasite Type: Influence of Water Vapour and of Si/Al Ratio. Microporous and Mesoporous Materials, 111, 334-342. https://doi.org/10.1016/j.micromeso.2007.08.035
[40]
Cheng, H. and Reinhard, M. (2007) Sorption and Inhibited Dehydrohalogenation of 2, 2-Dichloropropane in Micropores of Dealuminated Y Zeolites. Environmental Science & Technology, 41, 1934-1941. https://doi.org/10.1021/es062332v
[41]
Guillemot, M., Mijoin, J., Mignard, S. and Magnoux, P. (2007) Adsorption of Tetrachloroethylene on Cationic X and Y Zeolites: Influence of Cation Nature and of Water Vapor. Industrial & Engineering Chemistry Research, 46, 4614-4620. https://doi.org/10.1021/ie0616390
[42]
Pires, J., Carvalho, A., Veloso, P. and de Carvalho, M.B. (2002) Preparation of Dealuminated Faujasites for Adsorption of Volatile Organic Compounds. Journal of Materials Chemistry, 12, 3100-3104. https://doi.org/10.1039/b205367e
[43]
Sakuth, M., Meyer, J. and Gmehling, J. (1995) Vapor Phase Adsorption Equilibria of Toluene+1-Propanol Mixtures on Y-Zeolites with Different Silicon to Aluminum Ratios. Journal of Chemical and Engineering Data, 40, 895-899. https://doi.org/10.1021/je00020a035
