Title of article :
Modification of Co/TiO2 for dry reforming of methane at 2 MPa by Pt, Ru or Ni Original Research Article
Author/Authors :
Katsutoshi Nagaoka، نويسنده , , Kazuhiro Takanabe، نويسنده , , Ken-ichi Aika، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2004
Pages :
8
From page :
151
To page :
158
Abstract :
Influences of an addition of trace amounts of Pt (Pt/Co=0.005–0.05 in atomic ratio) or Ru (Ru/Co=0.01–0.05) and of replacement of Co by Ni (Ni:Co=1:99–100:0) to 0.5 wt.% Co/TiO2 have been investigated for the dry reforming of methane at 2 MPa. Co/TiO2 reduced at 1123 K showed slow deactivation due to oxidation of Co. The addition of noble metals improved the catalytic stability of Co/TiO2 drastically. The strong resistant nature of Co/TiO2 to coke deposition was also retained by the catalysts. TPR revealed that noble metals improved the reducibility of cobalt oxide. The replacement of Co by a small amount of Ni also enhanced the catalytic stability of Co/TiO2, but replacement by an excess of Ni resulted in the decrease of catalytic stability because of coking. CoNi/TiO2 with an optimum Co:Ni ratio of 90:10 presented high stability with only an insignificant amount of coke deposition under 2 MPa, where coke deposition is highly favorable.
Keywords :
Methane dry reforming , Co/TiO2 , High pressure , Deactivation by metal oxidation , Effect of noble metals , Effect of nickel
Journal title :
Applied Catalysis A:General
Serial Year :
2004
Journal title :
Applied Catalysis A:General
Record number :
1151534
Link To Document :
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