Chemical Form of Iorn Catalyst in NEDOL Liquefaction Residue

Hiromi Yamashita, Qianlin Zhuang, Takashi Kyotani, Akira Tomita

    Research output: Contribution to journalArticlepeer-review

    2 Citations (Scopus)


    In order to examine the feasibility of catalyst recovery from liquefaction residue, fundamental study on the properties of catalyst in the residue was carried out by using XRD, SEM/XMA, XAFS and XPS techniques. Residues were obtained from 1t/d NEDOL PSU plant which uses Wandoan, Illinois and Wyoming coals as feedstocks and synthetic pyrite as catalyst. Special attention has been paid on the interaction of catalyst with mineral matter and heavy organics in coal. It was found that the catalyst converted to pyrrhotite during liquefaction was covered with organic materials which can be removed by treating with CS2/N-methyl pyrolidinone solvent.

    Original languageEnglish
    Pages (from-to)993-999
    Number of pages7
    JournalJournal of the Japan Institute of Energy
    Issue number10
    Publication statusPublished - 1993 Jan 1


    • Coal liquefaction residue
    • Synthetic pyrite catalyst
    • XAFS
    • XPS
    • XRD

    ASJC Scopus subject areas

    • Renewable Energy, Sustainability and the Environment
    • Fuel Technology
    • Energy Engineering and Power Technology


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