徳島大学 教育・研究者情報データベース(EDB)

1. 徳島大学.大学院社会産業理工学研究部.理工学域.応用化学系.化学プロセス工学分野(2017年4月1日〜)
2. 徳島大学.先端技術科学教育部.物質生命システム工学専攻.化学機能創生コース.化学プロセス工学講座(2012年4月1日〜)
3. 徳島大学.大学院社会産業理工学研究部.フロンティア研究センター.資源循環研究部門.環境エネルギー創生分野(〜2018年3月31日)

1. (英) Kato Yuki / (日) 加藤 裕樹 / (読) かとう ゆうき

   役割	任意
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2. (英) Misu Hisanobu / (日) 三栖 央頌 / (読) みす ひさのぶ

   役割	任意
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   学籍番号	推奨	****

3. (英) Shimazu Sho / (日) 島津 匠 / (読) しまず しょう

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   学籍番号	推奨	****

4. 加藤 雅裕([徳島大学.大学院社会産業理工学研究部.理工学域.応用化学系.化学プロセス工学分野]/[徳島大学.理工学部.理工学科.応用化学システムコース.化学プロセス工学講座])

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5. (英) Ninomiya Wataru / (日) 二宮 航 / (読) にのみや わたる

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6. 杉山 茂([徳島大学.大学院社会産業理工学研究部.理工学域.応用化学系.化学プロセス工学分野]/[徳島大学.理工学部.理工学科.応用化学システムコース.化学プロセス工学講座])

   役割	任意
   貢献度	任意
   学籍番号	推奨

(英) Introduction of a Small Amount of Chromium to Enhance the Catalytic Performance of SBA-15 for the Oxidative Dehydrogenation of Isobutane to Isobutene

(英) Various solid oxide catalysts are active in the oxidative dehydrogenation of propane, but when these were used for the oxidative dehydrogenation of isobutane to isobutene, the yield was less than 2%. An improved yield of isobutene to 8% was obtained in the oxidative dehydrogenation of isobutane using folded-sheet mesoporous material (FSM-16) and mesoporous molecular sieve (MCM-41), either added or unadded with chromium via impregnation or template ion exchange methods. Further activity enhancement, however, could not be attained. In the present study, in order to introduce chromium cations into the framework of SBA-15 using a direct synthesis method, chromium nitrate was mixed with TEOS in an aqueous starting solution with pH adjusted to 1.5, which was followed by the hydrothermal treatment. Loading the resultant catalyst, SBA-15, with a small amount of chromium (1.84 wt% Cr-SBA-15) returned a greater yield of isobutene (15.4%) at 723 K, although previous report showed that SBA-15 supported with chromium oxide (CrOx/SBA-15) prepared via incipient wetness impregnation showed a lower yield of isobutene (11%) at 813 K. In order to explain such an improvement, the catalysts were characterized using XRD, TEM, N2 adsorption-desorption and NH3 temperature-programmed desorption. A substantial amount of specific surface area (1,610 m2/g) was detected in active Cr-SBA-15, although the structural and acidic nature of the catalyst showed the general properties of other mesoporous silicas. It is possible that when the Cr6+ species is converted from Cr3+, the great specific surface area of Cr-SBA-15 could be a factor in the oxidative dehydrogenation of isobutane to isobutene.

1. (英) Oxidative dehydrogenation
2. (英) Isobutane
3. (英) Palladium
4. (英) SBA-15
5. (英) Chromium