Numerical Simulation of CO Methanation for the Production of Synthetic Natural Gas in a Fluidized Bed Reactor
2017
Sun, Liyan | Luo, Kun | Fan, Jianren
In order to obtain the characteristics of the CO methanation process, numerical simulations are carried out in a fluidized bed reactor. The model is validated by comparing the simulation results of the gas composition with experimental data. The influences of the operational parameters on H₂ conversion and CH₄ yield are evaluated. The CO conversion and selectivity of CH₄ increase with rising pressure but decrease with rising temperature. The increase of the catalyst inventory leads to difficulty in removing the reaction heat and reducing the production of CH₄. The superficial gas velocity influences the production of methane slightly but not the reaction rates. Moreover, the CH₄ production and CO conversion decrease with the decrease of the H₂/CO ratio of feed composition. Meanwhile, the performance of the water–gas shift reaction on the CH₄ yield is also analyzed. The addition of water into the feed composition benefits the production of methane and the CO conversion.
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