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Inoue, Satoshi; Asaoka, Sachio; Nakamura, Munekazu

doi:10.1023/a:1019018206430

Cited by 10 publications

(2 citation statements)

References 7 publications

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“…The acid amount of (Ni-Mo)/[γAl 2 It is considered that these novel active sites (moderate and strong acids) are formed as shown in …”

Section: Novel Active Sites Formed Concertedly At the Interface Of Namentioning

confidence: 99%

“…Since recent catalyst research is usually focused on zeolites with various sub-nanometer space and surface, or unimodally porous materials with tens-nanometer space and surface, one-nano-(nanometer) order space and materials remain outside of well-studied catalysis in industrial applications [1][2][3][4][5]. If technologies based on one-nano-order space and materials such as nanopores, nano-oxides, nanozeolites, and nanointerfaces can be designed and prepared well in an industrial sense, they interest us as keys for opening up novel catalysis fields in industrial applications.…”

Section: Introductionmentioning

confidence: 99%

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Catalysis at the interface of nano-oxides and nanozeolites

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Jang

Sakashita

et al. 2008

Pure and Applied Chemistry

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The catalysts that can efficiently hydro-reform higher n-paraffin to lower isoparaffins for environmentally friendly gasoline were studied. The catalysts were examined by the conversion of n-hexadecane, n-C 16 H 34 to i-C 6 H 14~i -C 12 H 26 . The tri-modally nanoporous (nanometer-size) catalysts composed of (Ni-Mo)/[γ-Al 2 O 3 ], nano-oxide, and nanocrystalline zeolite have some active and selective performances because of the cooperation between (Ni-Mo)/[γ-Al 2 O 3 ] and the composite of nano-oxide-nanozeolite. The (Ni-Mo)/[γ-Al 2 O 3 ] component holding the skeletal isomerization activity enhances the cracking activity on the composite of nanoporous (np)-Al 2 O 3 -USY (ultra-stable Y-type zeolite) to result in i-C 6 H 14~i -C 12 H 26 as the isomerization of n-hexadecane followed the cracking reaction. The catalyst composed of nanocrystalline BEA (beta-type zeolite) or MFI (ZSM-5-type zeolite) zeolite can be more activated with the nano-SiO 2 than with the nano-Al 2 O 3 . The catalyst composed of the dealuminated zeolite, USY (SiO 2 /Al 2 O 3 = 12) cannot be activated with the nano-SiO 2 but with the nano-Al 2 O 3 . This activation depends on the SiO 2 /Al 2 O 3 ratio of the USY.It is considered that the catalytic property of the three components is partially due to the novel active sites formed concertedly at the interface of the nano-oxides and the nanozeolites. The novel sites have a major role for the isomerization and cracking as the moderate and strong acids and are generated when Si-OH in the nanopores of the USY resulted from the dealumination catches Al-OH in the nano-Al 2 O 3 to form Si-O-Al-O-Al-O-Si instead of Si-O-Al-O-Si-O-Si-O.

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“…The acid amount of (Ni-Mo)/[γAl 2 It is considered that these novel active sites (moderate and strong acids) are formed as shown in …”

Section: Novel Active Sites Formed Concertedly At the Interface Of Namentioning

confidence: 99%