Abstract
Two series of catalysts with nickel oxide or molybdenum oxide as the active component and with different zeolites as supports were prepared by incipient wetness impregnation method, and their structural properties and acidity were characterized by means of XRD, H2-TPR, N2 adsorption and desorption, FTIR spectrum of adsorbed pyridine and NH3-TPD. The catalytic activity of the prepared materials was investigated for the hydrodealkylation of commercial C9 + heavy aromatics to BTX. The results show that the catalytic performance is greatly influenced by the specific surface area, the acidity and the interaction between zeolite and metal oxide, and little affected by the pore diameter of catalysts. For NiO catalysts, the samples with the moderate interaction between zeolite and NiO exhibit the relatively high selectivity of BTX. And for MoO3 catalysts, the presence of the molybdenum species associated with Brønsted acid site causes the remarkable reduction of selectivity. The presence of Brønsted acid sites, the growth of the strength of Lewis acid sites and the increase of acid amount and the specific surface area can all enhance the conversion of C9 + aromatics. Finally, compared with other zeolites, the HMCM-56 catalysts show the excellent overall catalytic performance with the yield of BTX more than 60 mol%, whether using NiO or MoO3 as the active component.
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References
Grenoble DC (1979) J Catal 56:32
Ozawa A, Kubota T, Mie H, Taketani T (1976) JP 51,029,131
Daly FP, Wilhelm FC (1984) USP 4,436,836
Wu AH, Drake CA (1998) USP 5,789,642
Wu AH, Drake CA, Melton RJ (1998) USP 5,714,660
Tabak SA, Morrison RA (1982) USP 4,341,622
Howley PA, Shih SS (1991) USP 5,001,296
Wu AH, Drake CA (1997) USP 5,698,757
Kato H, Tanaka H, Iwayama K, Ichioka R (1998) EP 0,816,311
Ichioka R, Yamakawa S, Okino H, Kato H, Iwayama K, Konta H, Kitamura A (2000) USP 6,040,490
Serra JM, Guillon E, Corma A (2004) J Catal 227:459
McMinn TE, Stachelczyk DA (2005) USP 2,005,065,017
Choi S, Oh SH, Kim YS, Seong KH, Lim BS, Lee JH (2006) Catal Surv Asia 10:110
Pawelec B, Mariscal R, Navarro RM, Campos-Martin JM, Fierro JLG (2004) Appl Catal A 262:155
Fúnez A, De Lucas A, Sánchez P, Ramos MJ, Valverde JL (2008) Chem Eng J 136:267
Arnoldy P, De Jonge JCM, Moulijn JA (1985) J Phys Chem 89:4517
Liu H, Xu Y (2006) Chin J Catal 27:319
Serra JM, Guillon E, Corma A (2005) J Catal 232:342
Toppi S, Thomas C, Sayag C (2002) J Catal 210:431
Acknowledgments
The authors thank China National Petroleum Corporation (CNPC) (Project W06-04A-01-01A) for the financial support of this work.
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Shen, Q., Zhu, X., Dong, J. et al. Hydrodealkylation of C9 + Heavy Aromatics to BTX over Zeolite-Supported Nickel Oxide and Molybdenum Oxide Catalysts. Catal Lett 129, 170–180 (2009). https://doi.org/10.1007/s10562-008-9786-9
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DOI: https://doi.org/10.1007/s10562-008-9786-9