Catalytic and Physical Properties of Ca2+-doped MgO

Masahiko Matsukata, Eiji Okanari, Ken Ichiro Kobayashi, Eiichi Kikuchi, Yoshiro Morita

    Research output: Contribution to journalArticle

    3 Citations (Scopus)

    Abstract

    Ca2+ ions loaded on MgO surface markedly promoted catalytic activities of MgO for isomerization of 1-butene, hydrocarbon gasification with CO2 or O2, and the reverse water-gas shift reaction, although MgO itself was almost inactive after treatment at 1273K in air. Ca2+ ions also increased the basicity and basic strength of MgO. Strong basic sites catalyzed isomerization of 1-butene. In the course of impregnation with Ca(NO3)2, MgO (periclase) was completely transformed into hydrate (brucite) by the action of nitrate ions. It is considered that Ca2+ ions interfere with the transformation of surface arrangements accompanied with structural transformation from brucite (hcp) to periclase (fcc). It wasm found that most of Ca2+ ions aggregated to form particles of CaO on the surface of MgO while Ca2+ ions were highly dispersed on the surface of MgO when the MgO was prepared from basic carbonate salt involving calcium as an impurity.

    Original languageEnglish
    Pages (from-to)97-109
    Number of pages13
    JournalSekiyu Gakkaishi (Journal of the Japan Petroleum Institute)
    Volume32
    Issue number2
    DOIs
    Publication statusPublished - 1989

    ASJC Scopus subject areas

    • Fuel Technology

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