Insights into the catalytic CO2 methanation of a boiling water cooled fixed-bed reactor: Simulation-based analysis

Gruber, Manuel; Wiedmann, Denis; Haas, Manuel; Harth, Stefan; Loukou, A.; Trimis, D.

doi:10.1016/j.cej.2020.126788

Cited by 18 publications

(2 citation statements)

References 36 publications

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“…These values showed in the range obtained from other literatures, which reported about 60-120 kJ/mol for Ni-catalysts [56, 64, 65, 69-73, 75, 113, 114]. In addition, the activation energy obtained higher than 50 kJ/mol indicates that the experimental kinetic investigations were studied with the absence of transport limitations [115]. The value of activation energy for RWGS reaction was 89 kJ/mol, nearly with Marocco et al [94], who reported 85 kJ/mol for RWGS reaction over Ni catalyst.…”

Section: Kinetic Model and Parameter Estimationsupporting

confidence: 76%

Carbon dioxide hydrogenation to methane over silica supported nickel catalysts in a differential reactor and kinetic model development

Khuenpetch

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Development of a kinetic model for CO2 methanation over a commercial nickel catalyst was performed to consider pathways of CO2 conversion via Sabatier and RWGS reactions. H2/CO2 ratio in the feed gas composition was varied at the stoichiometry of the Sabatier reaction assuming a fictitious CO2 conversion of 0 to 0.7. Non-stochiometric gas feeding and the addition of product gases, i.e., methane and steam, were also considered to examine reaction orders and inhibition effects. The kinetic tests were carried out at 300350 ?C and 0.10.9 MPa. GHSV corresponded to 37,494 h-1. The stable activity was achieved by forcibly stressing the catalyst under the equilibria at 500 ?C for 35 h. The kinetic measurements were conducted at an isothermal differential fixed bed reactor in the absence of heat and mass transport limitations. The methanation reaction was first fitted with a power law (PL, PL-H2O, PL-WI, PL-OH) and LH approaches by considering the Sabatier reaction. Then, the RWGS reaction was added to consider CO formation using power law models. The least-square method was performed to minimize the residues between experimented and predicted reaction rate values for prediction kinetic parameters. The models were discriminated under the lowest value of the Akaike information criterion (AIC) and Bayesian information criterion (BIC). The results showed a better fitting of experimental observations by using the LH expression with the formation of formyl as RDS and power law model with inhibiting influence of water.

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Section: Kinetic Model and Parameter Estimationsupporting

confidence: 76%

Carbon dioxide hydrogenation to methane over silica supported nickel catalysts in a differential reactor and kinetic model development

Khuenpetch

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“…Information on used simulation model: Hauser, A.; Karl, J.: 2D Pseudo-Homogeneous Simulation Model of an Additively Manufactured Reactor for Catalytic Methanation. References [41,[53][54][55][56][57][58][59][60][61][62][63][64][65][66]…”

Section: Supplementary Materialsmentioning

confidence: 99%

Utilization of Synthetic Steel Gases in an Additively Manufactured Reactor for Catalytic Methanation

et al. 2023

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The path to European climate neutrality by 2050 will require comprehensive changes in all areas of life. For large industries such as steelworks, this results in the need for climate-friendly technologies. However, the age structure of existing steelworks makes transitional solutions such as carbon capture, utilization and storage (CCUS) necessary as short-term measures. Hence, a purposeful option is the integration of technical syntheses such as methanation into the overall process. This work summarizes hydrogen-intensified methanation experiments with synthetic steel gases in the novel additively manufactured reactor ‘ADDmeth1′. The studies include steady-state operating points at various reactor loads. Blast furnace gas (BFG), basic oxygen furnace gas (BOFG) and three mixtures of these two gases serve as carbon sources. The methanation achieved methane yields of 93.5% for BFG and 95.0% for BOFG in the one-stage once-through setup. The results suggest a kinetic limitation in the case of BFG methanation, while an equilibrium limitation is likely for BOFG. There is a smooth transition in all respects between the two extreme cases. The reaction channel inlet temperature ϑin showed a large influence on the reactor ignition behavior. By falling below the threshold value, a blow-off occurred during experimental operation. By means of a simulation model, practical operating maps were created which characterize permissible operating ranges for ϑin as a function of the gas composition and the reactor load.

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Design and operational guidelines of solar-driven catalytic conversion of CO2 and H2 to fuels

Haussener

2023

Applied Energy

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Insights into the catalytic CO2 methanation of a boiling water cooled fixed-bed reactor: Simulation-based analysis

Cited by 18 publications

References 36 publications

Carbon dioxide hydrogenation to methane over silica supported nickel catalysts in a differential reactor and kinetic model development

Carbon dioxide hydrogenation to methane over silica supported nickel catalysts in a differential reactor and kinetic model development

Utilization of Synthetic Steel Gases in an Additively Manufactured Reactor for Catalytic Methanation

Design and operational guidelines of solar-driven catalytic conversion of CO2 and H2 to fuels

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