Catalytic Hydrogenation of Carbon Dioxide to Methane in Wall‐Cooled Fixed‐Bed Reactors‡. Issue 12 (11th November 2016)

• Record Type: Journal Article
• Authors: Martinez Molina, Marta; Kern, Christoph; Jess, Andreas
• Other Names: Segovia‐Hernandez Juan Gabriel sponsoringEditor.
• Is Part Of: Chemical engineering & technology. Volume 39:Issue 12(2016:Dec.)
• Page Start: 2404
• Page End: 2415
• Publication Date: 2016-11-11
• Subjects: Carbon dioxide hydrogenation -- Energy storage -- Methanation -- Synthetic natural gas; Chemical engineering -- Periodicals; Chemical processes -- Periodicals; 660.05
• DOI: 10.1002/ceat.201500614
• Languages: English
• ISSNs: 0930-7516

Abstract

Abstract: The methanation of CO2 was studied in a wall‐cooled single‐tube fixed‐bed reactor with a nickel‐based catalyst. Heat transfer and kinetic parameters were experimentally determined. Temperature profiles were recorded under different conditions: inlet gas mixtures with CO2 diluted in H2 or N2, tubes with diameters of 2 or 4 cm, and pressures of 1 or 4 bar at 160–200 °C. Modeling of CO2 conversion and temperature profiles by a two‐dimensional reactor model was successfully achieved. The study is completed by modeling technical reactors for both upgrading of biogas and conversion of a CO2 /H2 feed gas free of CH4 ; design data of reactors for a production of 450 m 3 of synthetic natural gas per hour are given. Abstract : A wall‐cooled fixed‐bed reactor for carbon dioxide methanation at the laboratory scale is modeled by measuring heat transfer and kinetic parameters with a commercial nickel catalyst. The corrections implemented in the stagnant thermal conductivity for gas mixtures result in good agreement with the experimental data over a wide temperature range.