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Measurements of Acidity of H-SSZ-35 by a Combined Method of IRMS-TPD Experiment and DFT Calculation

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Abstract

Infrared/mass spectroscopy-temperature programmed desorption of ammonia experiment on an SSZ-35 zeolite was measured to characterize the acidity. Two kinds of the Brønsted acid site were detected at 3,622 and 3,505 cm−1; these concentrations were nearly the same, and the strengths ∆H were 129 and 117 kJ mol−1, respectively. These Brønsted hydroxyls were identified to be located in the 10-ring and 5-ring in the STF cage, respectively. These measured strengths were supported well by the DFT calculation.

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Acknowledgments

The present work is supported by the Grant-in-Aids for Scientific Research (B, 21360396 and C, 20560721) from Ministry of Education, Culture, Sports, Science and Technology, Japan. We thank Professor Jiří Čejka of Academy of Sciences of the Czech Republic for proving us with the sample of SSZ-35 and having fruitful discussion.

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Authors and Affiliations

  1. Department of Chemistry and Biotechnology, Tottori University, Koyama-cho Minami, Tottori, 680-8552, Japan

    Katsuki Suzuki, Naonobu Katada & Miki Niwa

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  1. Katsuki Suzuki
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  2. Naonobu Katada
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  3. Miki Niwa
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Correspondence to Miki Niwa.

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Suzuki, K., Katada, N. & Niwa, M. Measurements of Acidity of H-SSZ-35 by a Combined Method of IRMS-TPD Experiment and DFT Calculation. Catal Lett 140, 134–139 (2010). https://doi.org/10.1007/s10562-010-0440-y

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  • DOI: https://doi.org/10.1007/s10562-010-0440-y

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