Abstract
Catalysts were prepared by dealumination of H-MCM-22 zeolite with oxalic acid leaching, followed by shaping and liquid phase modification with siloxane. The catalytic performance was measured with selective disproportionation of toluene in a fixed-bed reactor. The unmodified H-MCM-22 zeolite exhibited much higher initial activity than H-ZSM-5 with a thermodynamic equilibrium distribution of xylene products. The oxalic acid treatment of H-MCM-22 improved the selectivity for para-xylene by 10–18%. The modification by siloxane of the oxalic acid treated H-MCM-22 turned out to be highly selective for para-xylene, however, with the expense of the conversion. It is proposed that the high para-selectivity was closely associated with the contraction of micropore windows and the elimination of acid sites at the external surface by the deposited silica. Therefore, the modified H-MCM-22 is a potential catalyst for the selective disproportionation of toluene with a high para-selectivity.
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References
T.C. Tsai, S.B. Liu, and I. Wang, Appl. Catal. A. 181, 355 (1999).
T.F. Degnan Jr, J. Catal. 216, 32 (2003).
N.Y. Chen, W.W. Kaeding, and F.G. Dwyer, J. Am. Chem. Soc. 101, 6783 (1979).
W.O. Haag and D.H. Olson. USP 4,097, 543 (1978).
T. Hibino, M. Niwa, and Y. Murakami, Zeolites 13, 518 (1993).
R.W. Weber, K.P. Möller, and C.T. O'Connor, Microporous Mesoporous Mater. 35–36, 533 (2000).
J.H. Kim, A. Ishida, and M. Okajima, J. Catal. 161, 387 (1996).
R.W. Weber, K.P. Möller, M. Unger, and C.T. O'Connor, Microporous Mesoporous Mater. 23, 179 (1998).
Y. Qin, Y.H. Yue, and Z. Gao, Chem. J. Chinese U. 19, 1479 (1998).
M. Niwa, M. Kato, T. Hattori, and Y. Murakami, J. Phys. Chem. 90, 6233 (1986).
Y.H. Yue, Y. Tang, Y. Liu, and Z. Gao. Ind. Eng. Chem. Res. 35, 430 (1996).
M.K. Rubin and P. Chu. US Patent No. 4,954, 325 (1990).
M.E. Leonowicz, J.A. Lawton, S.L. Lawton, and M.K. Rubin, Science 264, 1910 (1994).
M.A. Asensi, A. Corma, and A. Martínez, J. Catal 158, 561 (1996).
S.J. Kim, K.D. Jung, and O.S. Joo, J. Porous Mater. 11, 211 (2004).
A. Corma and J. Martínez-Triguero, J. Catal. 165, 102 (1997).
J.C. Cheng, T.F. Degnan, J.S. Beck, Y.Y. Huang, M. Kalyanaraman, J.A. Kowalski, C.A. Loehr, and D.N. Mazzone, Stud. Surf. Sci. Catal. 128, 53 (1999).
A. Corma, M. Davis, V. Fornés, V. González-Alfaro, R. Lobo, and A. V. Orchillés, J. Catal. 167, 438 (1997).
A. Corma, V. Gonzàlez-Alfaro, and A. V. Orchillés, Appl. Catal. A. 129, 203 (1995).
P. Wu, T. Komatsu, and T. Yashima, Microporous Mesoporous Mater. 22, 343 (1998)
N. Kumar and L.E. Lindfors, Appl. Catal. A. 147, 175 (1996).
S. Unverricht, M. Hunger, S. Ernst, H.G. Karge, and J. Weitkamp, Stud. Surf. Sci. Catal. 84, 37 (1994).
S.H. Park and H.K. Rhee, React. Kinet. Catal. Lett. 78, 81 (2003).
V. Mavrodinova and M. Popova, Catal. Commun. 6, 247 (2005).
V. Mavrodinova, M. Popova, M.R. Mihályi, G. Par-borbely, and C. Minchev, React. Kinet. Catal. Lett. 83, 345 (2004).
G.G. Juttu and R.F. Lobo, Microporous Mesoporous Mater. 40, 9 (2000).
Z.R. Zhu, Q.L. Chen, W. Zhu, D.J. Kong, and C. Li, Catal. Today 93–95, 321 (2004).
W.W. kaeding, C. Chu, L.B. Young, and S.A. Butter, J. Catal. 69, 392 (1981).
Y.S. Xiong, P.G. Rodewald, and C.D. Chang, J. Am. Chem. Soc. 117, 9427 (1995).
D. Meloni, D. Martin, and M. Guisnet, Appl. Catal. A 215, 67 (2001).
S. Laforge, D. Martin, J.L. Paillaud, and M. Guisnet, J. Catal. 220, 92 (2003).
S. Laforge, D. Martin, and M. Guisnet, Microporous Mesoporous Mater. 67, 235 (2004).
S. Zheng, H.R. Heydenrych, H.P. Röger, A. Jentys, and J.A. Lercher, Topics Catal. 22, 101 (2003).
R. Giudici, H.W. Kouwenhoven, and R. Prins, Appl. Catal. A. 203, 101 (2000).
P. Ayrault, J. Datka, S. Laforge, D. Martin, and M. Guisnet, J. Phys. Chem. B. 108, 13755 (2004).
B. Anand Halgeri and D. Jagannath, Catal. Today 73, 65 (2002).
J.H. Liang, X.Q. Ren, and J. Wang, Petrochem. Tech. (Chinese) 33-S1, 1010 (2004).
S. Zheng, H. Tanaka, A. Jentys, and J.A. Lercher, J. Phys. Chem. B. 108, 1337 (2004).
S. Zheng, H.R. Heydenrych, A. Jentys, and J.A. Lercher, J. Phys. Chem. B. 106, 9552 (2002).
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Ren, X., Liang, J. & Wang, J. H-MCM-22 zeolitic catalysts modified by chemical liquid deposition for shape-selective disproportionation of toluene. J Porous Mater 13, 353–357 (2006). https://doi.org/10.1007/s10934-006-8030-5
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DOI: https://doi.org/10.1007/s10934-006-8030-5