Preparation and characterization of template-free mordenite type zeolite and comparison of m-xylene isomerization reaction over mordenite and SAPO-11
محورهای موضوعی : Iranian Journal of CatalysisZahra Vosoughi Rahbari 1 , Mehrji Khosravan 2 , Ali Nemati Kharat 3
1 - Department of Chemistry, Faculty of Science, Shahid Bahonar University of Kerman, Kerman, Iran.
2 - Department of Chemistry, Faculty of Science, Shahid Bahonar University of Kerman, Kerman, Iran.
3 - Department of Chemistry, Faculty of Science, University of Tehran, Tehran, Iran.
کلید واژه: Catalyst, Mordenite zeolite, m-Xylene isomerization, SAPO-11,
چکیده مقاله :
In this work, Mordenite zeolite was successfully synthesized with Si/Al ratio of 18 in absence of organic template. The hydrothermal method was applied for synthesis under optimum conditions: 24 h synthesis time, 180°C temperature and 2 days aging time. The obtained zeolite was characterized by X-ray powder diffraction (XRD), Brunauer-Emmett-Teller (BET), X-ray fluorescence (XRF), Fourier Transforms infrared Spectroscopy (FT-IR) and Scanning Electron Microscopy (SEM). The prepared sample had total (BET) surface area of 331.63 m2g-1, whereas total pore volume was 0.278 cm3g-1. The catalytic performance of this catalyst was investigated for meta-xylene isomerization reaction in a fixed bed reactor at the 10 bars Pressure, 380°C temperature and 3.35 h-1 Weight hourlyspace velocity (WHSV) of feed. The results compared with a commercial SAPO-11 catalyst (Si/Al = 20) and showed that the mordenite gave better Para/Ortho ratio (63%) and fewer amount of xylene loss (2.11%) compared to SAPO-11.
[1] G. Horacio, R. Abante, C. Luis, R. Jorge, Ind. Eng. Chem. Res. 35 (1996) 3964-3972.
[2] V. Sreedharan, S. Bhatia, J. Chem. Eng. 36 (1987) 101-109.
[3] P.K. Sen Sarma, S. Bhatia, Zeolites 7 (1987) 511-516.
[4] K. Ahmed, M. Sameh, A. Eman, M. Sahar, J. Chin. Chem. Soc. 51 (2004) 817-826.
[5] A. Nezamzadeh-Ejhieh, M. Khorsandi, Desalination 262 (2010) 79–85.
[6] D.G. Maia, C. Yolanda, S. Pilar, Microporous Mesoporous Mater. 144 (2011) 162-170.
[7] Sh. Aghabeygi, R. Kia Kojoori, H. Vakili Azad, Iran. J. Catal. 6 (2016) 275-279.
[8] A. Nezamzadeh-Ejhieh, Z. Salimi, Desalination 280 (2011) 281–287.
[9] M.H. Sheikh-Mohseni, A. Nezamzadeh-Ejhieh, Electrochim. Acta 147 (2014) 572–581.
[10] N. Samadani Langeroodi, Iran. J. Catal. 3 (2013) 79-82.
[11] A. Bagheri Ghomi, V. Ashayeri, Iran. J. Catal. 2 (2012) 135-140.
[12] M. Mohamed, M. Tarek, O. Ibraheem, A. Ibraheem, Microporous Mesoporous Mater. 84 (2005) 84-96.
[13] M. Hisham, E. Moustafa, A. Ehab, Powder Technol. 23 (2012) 757-760.
[14] L. Xianfeng, P. Roel, A. Jeroen, J. Catal. 262 (2009) 257-265.
[15] T.C. Tsai, S.B. Liu, I. Wang, Appl. Catal. A 181 (1999) 355-398.
[16] C.H. Baerlocher, L.B. McCusker, D.H. Olson, Atlas of zeolite framework types, 6th Ed., Elsevier, USA, 2007.
[17] K.B. Pramod, M.S. Rao, K.V.G.K. Gokhale, Ind. Eng. Chem. Prod. Res. Dev. 17 (1978) 223-227.
[18] V. Nagabhatla, K. Manoj, Microporous Mesoporous Mater. 92 (2006) 31-37.
[19] L. MarceIo, I. Diego, R.C. Nádia, M. Fernandes, B.C. Sibele, Appl. Clay Sci. 41 (2008) 99-104.
[20] R. Xu, W. Pang, J. Yu, Q. Huo, J. Chen, Chemistry of zeolites and related porous materials, Wiley, Asia, 2007.
[21] G. Peng, L. Xiaofeng, Z. Shang, X. Qinghu, D. Tao, J. Pet. Sci. Eng. 9 (2012) 544-550.
[22] J. Bhadauriaa, B.K. Singhb, A. Tomarar, R. Tomara, J. Chem. Pharm. Res. 3 (2011) 245-257.
[23] J.C. Moreno-Piraján, V. S. Garcia-Cuello, L. Giraldo, J. Thermodyn. Catal. 1 (2010) 1-8.
[24] A. Nezamzadeh-Ejhieh, A. Shirzadi, Chemosphere 107 (2014) 136–144.
[25] M.M.J. Treacy, J.B. Higgins, Collection of simulated XRD powder patterns for zeolites, 4th Ed., Elsevier, Oxford, 2001.
[26] W. Yi, K. Yuichi, O. Toshio, Water Res. 41 (2007) 269-276.
[27] T. Selvam, W. Schwieger, Stud. Surf. Sci. Catal. 142 (2002) 407-414.
[28] Y. Liu, A. Yan, Q. Xu, Appl. Catal. A 67 (1991) 169-177.
[29] M. Filipa Ribeiro, F. Ramoa Ribeiro, P. Dufresne, C. Marcilly, J. Mol. Catal. 39 (1987) 269-276.
[30] N.M. Tukur, Al-K. S. Al-Khattaf, Chem. Eng. J. 166 (2011) 348-357.
