Enhancement of Catalytic Activity for Toluene Disproportionation by Loading Lewis Acidic Nickel Species on ZSM-5 Zeolite

• Suganuma, Satoshi

• Nakamura, Koshiro

• Okuda, Akihito

• Katada, Naonobu

抄録

Impregnation of various heteroelements on the ZSM-5 zeolite was applied to improvement of the catalytic activity in toluene disproportionation. Nickel loaded on ZSM-5 (Ni/ZSM-5) exhibited higher catalytic activity (toluene conversion) and lower benzene / xylene ratio (closer to the stoichiometry, meaning low rate of side reaction) than H-ZSM-5 zeolite. The Ni/ZSM-5 with Ni/Al = 0.6 showed the maximum in catalytic activity, and excess Ni loading caused decrease in the conversion and increase in the benzene / xylene ratio due to decrease of acid amount and acceleration of dealkylation, respectively. The detailed analysis of acidic property by means of ammonia IRMS-TPD method showed that the Ni loading generated Lewis acid sites on the zeolite. The synergy of Brønsted and Lewis acid sites, ascribed to Si-OH-Al and Ni species, respectively, is suggested to give the high activity of desired reaction.

収録刊行物

• Molecular catalysis

  Molecular catalysis 435 110-117, 2017

  Elsevier

キーワード

• ZSM-5
• Ni loading
• toluene disproportionation
• acidic property
• synergy effect

詳細情報

• CRID: 1050015354550173696
• NII論文ID: 120006543706
• ISSN: 24688231
• DOI: 10.1016/j.mcat.2017.03.029
• Web Site: https://repository.lib.tottori-u.ac.jp/records/7310
• Web Site: https://api.elsevier.com/content/article/PII:S2468823117301918?httpAccept=text/xml
• Web Site: https://api.elsevier.com/content/article/PII:S2468823117301918?httpAccept=text/plain
• 本文言語コード: en
• 資料種別: journal article
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