Periodic operation applied to the kinetic study of CO2 methanation

Periodic operation was applied to CO2 hydrogenation to CH4 at 383 K on 2% Ru/TiO2. A continuous feed recycle reactor combined with a diffuse reflectance IR cell and a mass spectrometer was used to follow simultaneously the gas phase CO2 and CH4 as well as the adsorbed species. Expts. consisting of periodic variations of CO2 in the H feed showed response curves with max./min. shifted in time in the sequence CO2, (formate)x->COx->CH4. Similar delays measured for the COx formation and hydrogenation indicate that both of these processes limit the overall reaction rate. A kinetic model was proposed and verified under periodic conditions. The main exptl. trends, which are pronounced time lags between CO2, COx and CH4, could be described satisfactorily. [on SciFinder (R)]


Published in:
Catalysis Today, 20, 3, 437-48
Year:
1994
Keywords:
Note:
CAN 121:182335
45-4
Industrial Organic Chemicals, Leather, Fats, and Waxes
Institute of Chemical Engineering, Swiss Federal Institute of Technology,Lausanne,Switz.
Journal
0920-5861
written in English.
7440-18-8 (Ruthenium) Role: CAT (Catalyst use), USES (Uses) (catalyst; periodic operation applied to kinetic study of carbon dioxide hydrogenation to methane); 1333-74-0 Role: RCT (Reactant), RACT (Reactant or reagent) (hydrogenation, mechanism; periodic operation applied to kinetic study of carbon dioxide hydrogenation to methane); 124-38-9 (Carbon dioxide) Role: RCT (Reactant), RACT (Reactant or reagent) (periodic operation applied to kinetic study of carbon dioxide hydrogenation to methane); 74-82-8P (Methane) Role: SPN (Synthetic preparation), PREP (Preparation) (periodic operation applied to kinetic study of carbon dioxide hydrogenation to methane)
Laboratories:




 Record created 2006-04-18, last modified 2018-03-17


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