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Author: search.filters.author.Na-Ranong, DuangkamolSubject: search.filters.subject.Iron oxide catalyst

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    Oxidative cracking of aromatic compounds related to lignin constituents with steam using ZrO2-Al2O3-FeOx catalyst
    (2010-10-22)
    Yoshikawa, Takuya
    ;
    Na-Ranong, Duangkamol
    ;
    Tago, Teruoki
    ;
    Masuda, Takao
    The catalytic activity of iron oxide composite catalyst (ZrO <inf>2</inf>-Al<inf>2</inf>O<inf>3</inf>-FeO<inf>x</inf>) was investigated for converting aromatic compounds derived from plant biomass into useful aromatics. Catalytic cracking of lignin constituent-related di-aroatics such as diphenyl ether, diphenyl methane, and 2-benzyloxyphenol, and mono-aromatics such as guaiacol, acetophenone, and 1-phenyl-1-propanol was carried out over ZrO <inf>2</inf>-Al<inf>2</inf>O<inf>3</inf>-FeO<inf>x</inf>. The catalytic reactions were conducted in a fixed-bed reactor at 773 K under atmospheric pressure. Diphenyl ether and diphenyl methane were stable, whereas 2-benzyloxyphenol was thermally decomposed, followed by the production of toluene and phenol over ZrO<inf>2</inf>-Al<inf>2</inf>O<inf>3</inf>-FeO <inf>x</inf>. Guaiacol and acetophenone were selectively converted into 54 C-mol% of phenol and 29 C-mol% of benzene, respectively. The methoxy and carbonyl groups were decomposed into gaseous products mainly consisting of CO<inf>2</inf>, whereas dehydration of the aliphatic hydroxyl group in 1-phenyl-1-propanol mainly occurred to produce 1-phenyl-1-propene. ZrO <inf>2</inf>-Al<inf>2</inf>O<inf>3</inf>-FeO<inf>x</inf> catalyst is effective for degrading alkyl ether bonds between aromatic rings, and the ring substituent methoxy and carbonyl groups.
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    Recovery of useful chemicals from oil palm shell-derived oil using zirconia supporting iron oxide catalysts
    (2008-05-01)
    Na-Ranong, Duangkamol
    ;
    Yuangsawad, Ratanaporn
    ;
    Tago, Teruoki
    ;
    Masuda, Takao
    The possibility for recovering methanol, acetic acid and phenol from oil palm shell-derived oil was investigated. Thermal cracking mainly produced a solid residue and was not a suitable method for recovering these three target chemicals. When zirconia supporting iron based catalyst (Zr/FeOx, Zr-FeOx or Zr-Al-FeOx) was applied, the "others"-unidentified hydrocarbons-were satisfactorily removed without formation of a solid residue while these target compounds were considerably stable over these catalysts. Zr-Al-FeOx showed the highest activity for oxidation of the oil to CO<inf>2</inf>. Effect of operating parameters (steam to oil ratio, temperature and time factor) on its performance was further investigated. In order to gain insight into the reaction path, the reaction using model compounds (methanol, acetic acid, acetone, ethyl acetate and phenol) was performed. © 2008 Springer.