Synthesis and characterization of chromium-added Pt/beta zeolite and its catalytic performance for n-heptane isomerization

Yoshiyuki Izutsu, Yuki Oku, Yusuke Hidaka, Kaname Yoshida, Yukichi Sasaki, Yasushi Sekine, Eiichi Kikuchi, Masahiko Matsukata

    Research output: Contribution to journalArticle

    8 Citations (Scopus)

    Abstract

    Catalysis of Pt/beta zeolite catalyst modified via the addition of various elements (Ca, Cr, Mn, Fe, Co, Ni or Cu) for n-heptane skeletal isomerization was investigated at 513 K in a conventional flow reactor with a fixed catalyst bed. It was found that, among the catalysts tested, PtCr/beta was the most promising, since its use resulted in relatively high yields of multi-branched alkanes in conjunction with a very low selectivity for cracking products. Ion exchange was found to be an effective method for the addition of chromium to zeolite, compared to the evaporation to dryness process. Platinum particle sizes were observed using STEM. While particles ~10-30 nm in size were evident on the surface of Pt/beta, they were rarely observed on the PtCr/beta catalyst. It was concluded that platinum homogeneously dispersed within beta zeolite micropores resulted in the observed decreased cracking activity during n-heptane isomerization and that the addition of chromium had been effective in increasing degree of platinum dispersion. Graphical Abstract: [Figure not available: see fulltext.]

    Original languageEnglish
    Pages (from-to)486-494
    Number of pages9
    JournalCatalysis Letters
    Volume143
    Issue number5
    DOIs
    Publication statusPublished - 2013 May

    Fingerprint

    Zeolites
    Heptane
    Chromium
    Isomerization
    Platinum
    Catalysts
    Alkanes
    Chemical elements
    Paraffins
    Catalysis
    Ion exchange
    Evaporation
    Particle size
    n-heptane

    Keywords

    • BEA zeolite
    • Chromium
    • Isomerization
    • n-heptane
    • Platinum

    ASJC Scopus subject areas

    • Catalysis
    • Chemistry(all)

    Cite this

    Synthesis and characterization of chromium-added Pt/beta zeolite and its catalytic performance for n-heptane isomerization. / Izutsu, Yoshiyuki; Oku, Yuki; Hidaka, Yusuke; Yoshida, Kaname; Sasaki, Yukichi; Sekine, Yasushi; Kikuchi, Eiichi; Matsukata, Masahiko.

    In: Catalysis Letters, Vol. 143, No. 5, 05.2013, p. 486-494.

    Research output: Contribution to journalArticle

    Izutsu, Yoshiyuki ; Oku, Yuki ; Hidaka, Yusuke ; Yoshida, Kaname ; Sasaki, Yukichi ; Sekine, Yasushi ; Kikuchi, Eiichi ; Matsukata, Masahiko. / Synthesis and characterization of chromium-added Pt/beta zeolite and its catalytic performance for n-heptane isomerization. In: Catalysis Letters. 2013 ; Vol. 143, No. 5. pp. 486-494.
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    AU - Sasaki, Yukichi

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