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SAPO-11/HBeta composites for catalytic cracking of 2-butylene: effects of defect structure

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SAPO-11/HBeta composite was synthesized by using hydrothermal method (SB-H) and applied as catalyst for cracking of 2-butylene to C2–C3 olefins. SB-H sample exhibited comparatively high selectivity and high yield of C2–C3 olefins. XRD, IR, 27Al and 31P MAS NMR, Py-IR characterizations indicate that defect structure P(AlO4) n (n < 4) really existed in SB-H sample. SAPO-11 and HBeta chemically bonded and the defect P(AlO4) n (n < 4) formed during the hydrothermal synthesis of SB-H sample. P(AlO4) n (n < 4) unit caused new B acidic sites, which increased B acidic amount and B acidic distribution on SB-H sample. The improvement of B acidity decreased apparent active energy of cracking of 2-butylene to C2–C3 olefins on SB-H sample. Therefore, the high selectivity and high yield of C2–C3 olefins were obtained on SB-H sample in catalytic cracking of 2-butylene.

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Authors and Affiliations

  1. Research Institute of Petroleum Processing, Xue Yuan Road 18, P.O. Box 914-4, Beijing, 100083, P. R. China

    Xin Zhang, Jianwei Wang, Jin Zhong, Aisong Liu & Junkui Gao

  2. Institute fur Experimtalphysik, Fachbereich Physik, Freie Universitat Berlin, Arnimallee 14, D-14195, Berlin, Germany

    Xin Zhang

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  1. Xin Zhang
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  2. Jianwei Wang
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  3. Jin Zhong
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Correspondence to Xin Zhang.

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Zhang, X., Wang, J., Zhong, J. et al. SAPO-11/HBeta composites for catalytic cracking of 2-butylene: effects of defect structure. Catal Lett 111, 213–219 (2006). https://doi.org/10.1007/s10562-006-0150-7

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