Synthesis of novel aluminoborosilicate isomorphous to zeolite TUN and its acidic and catalytic properties

Feiyu Qin, Yong Wang, Yao Lu, Ryota Osuga, Hermann Gies, Junko N. Kondo, Toshiyuki Yokoi

研究成果: Article査読

1 被引用数 (Scopus)

抄録

The novel TUN-type aluminoborosilicate zeolite (denoted as [Al, B]-TUN), which consists of a three-dimensional pore system with 10-ring, has been hydrothermally synthesized for the first time and implied in cracking reaction. The mother gel composition including aluminum, boron, organic structure-directing agent and sodium were intensively studied and optimized. We found for the first time that the incorporation of B together with Al T-sites into the TUN framework led to the control of acidic properties including the number, strength and distribution of acid sites. The n-hexane cracking over different catalysts show that the [Al, B]-TUN zeolites have a longer catalyst duration and a higher P/E ratio (propylene/ethylene selectivity) than [Al]-TUN. Moreover, the comparison between TUN, MFI and *BEA-type zeolites indicates that TUN-type zeolite has a preference for propylene production. The relationship between acidic properties and carking behaviors were discussed and supported by the constraint index (CI) value measurement.

本文言語English
論文番号111237
ジャーナルMicroporous and Mesoporous Materials
323
DOI
出版ステータスPublished - 2021 8

ASJC Scopus subject areas

  • 化学 (全般)
  • 材料科学(全般)
  • 凝縮系物理学
  • 材料力学

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