- Title
- An experimental investigation on the effects of adding a transition metal to Ni/Al₂O₃ for catalytic hydrogenation of CO and CO₂ in presence of light alkanes and alkenes
- Creator
- Shadravan, Vahid; Kennedy, Eric; Stockenhuber, Michael
- Relation
- Catalysis Today Vol. 307, p. 277-285
- Publisher Link
- http://dx.doi.org/10.1016/j.cattod.2017.05.036
- Publisher
- Elsevier
- Resource Type
- journal article
- Date
- 2018
- Description
- The effect of transition metals on the activity and selectivity of a Ni/Al₂O₃ catalyst for carbon oxides hydrogenation was studied. It is found that each transition metal has different and distinct promoting or inhibiting influence. Nitric oxide was used as a probe molecule to study the electronic structure of a primary and two bi-metallic catalysts. Based on a series of catalyst activity and selectivity experiments, promoted bimetallic catalysts which enhanced and inhibited the activity and selectivity of the primary Ni/Al₂O3 catalyst were analysed by NO-FTIR experiments. The presence of multiple sites, with different electronic properties, were observed. It is concluded that the addition of transition metals to Ni/Al₂O₃ markedly changed the electronic structure of the primary catalyst. Hydrogen and carbon monoxide chemisorption experiments showed that the ratio of CO/H chemisorbed species was affected by addition of Mn and Cu to Ni/Al₂O₃. Temperature programmed desorption of H₂ and CO confirmed the presence of different active sites on Ni/Al₂O₃.
- Subject
- CO hydrogenation; CO₂ hydrogenation; nickel; bi-metallic; transition metals
- Identifier
- http://hdl.handle.net/1959.13/1409929
- Identifier
- uon:36086
- Identifier
- ISSN:0920-5861
- Language
- eng
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