Beneficial effects of noble metal addition to Ni/Al{sub 2}O{sub 3} catalyst for oxidative methane-to-syngas conversion
- National Chemical Lab., Pune (India)
Ni/Al{sub 2}O{sub 3} in its reduced (i.e., Ni{sup 0}) form is an active catalyst commonly used in the steam reforming and oxidative conversion of methane to syngas (i.e., CO and H{sub 2}) (1-5), which is a process of great practical importance. The as prepared/calcined form of the catalyst contains a catalytically inactive NiAl{sub 2}O{sub 4} phase, which is difficult to reduce. Hence, the oxidative methane-to-syngas conversion reaction on the calcined catalyst occurs or starts only at high temperature (about 750{degrees}C). However, the reaction on calcined Ni/MgO (6), Ni/CaO (7), and Ni/rare earth oxide catalysts is found to start at much lower temperatures because of their ease of reduction during the initial reaction period. From a practical point of view, the reaction on the calcined Ni/Al{sub 2}O{sub 3} should start at lower temperatures. Supported noble metal catalysts have also been used extensively for the oxidative conversion of methane to syngas. In this communication, the authors report preliminary results which reveal that the oxidative methane-to-syngas conversion reaction on calcined (i.e., unreduced) Ni/Al{sub 2}O{sub 3} can be made to start at temperatures much lower than 750{degrees}C and the catalyst performance can also be improved to some extent by adding noble metal (e.g., Pt, Pd, or Ru) to the catalyst. 13 refs., 1 fig., 2 tabs.
- OSTI ID:
- 224047
- Journal Information:
- Journal of Catalysis, Vol. 157, Issue 2; Other Information: PBD: Dec 1995
- Country of Publication:
- United States
- Language:
- English
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