Effects of Catalyst Activity, Particle Size and Shape, and Process Conditions on Catalyst Effectiveness and Methane Selectivity for Fischer-Tropsch Reaction: A Modeling Study
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2017
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We investigate effects of catalyst activity, catalyst particle shape (sphere, slab, and hollow cylinder), size (i.e., diffusion length), catalyst distribution (uniform vs eggshell type distribution for a spherical particle), and process conditions (temperature, pressure, syngas composition, and conversion level) on catalyst effectiveness factor and methane selectivity inside the catalyst pellet. In numerical simulations we utilize kinetic parameters for CO consumption rate and CH4 formation rate determined from experiments with a highly active Co/Re/gamma-Al2O3 catalyst. It is found that the use of small spherical particles (0.2-0.5 mm) or eggshell distribution for larger spherical particles with catalyst layer thickness less than approximately 0.13 mm is needed to avoid negative impact of diffusional limitations on CH4 selectivity under typical Fischer Tropsch synthesis operating conditions. For monolith reactors with wash-coated catalyst, diffusional limitations can be avoided by usi...ng a catalyst layer thickness less than 0.11 nun at base case conditions (473 K, 25 bar, and H-2/CO molar ratio of 2).
Izvor:
Industrial & Engineering Chemistry Research, 2017, 56, 10, 2733-2745Izdavač:
- Amer Chemical Soc, Washington
Finansiranje / projekti:
- Qatar National Research Fund (a member of the Qatar Foundation) [NPRP 7-559-2-211]
DOI: 10.1021/acs.iecr.7b00053
ISSN: 0888-5885
WoS: 000396807400014
Scopus: 2-s2.0-85017461320
Institucija/grupa
Tehnološko-metalurški fakultetTY - JOUR AU - Mandić, Miloš AU - Todić, Branislav AU - Zivanić, Ljiljana AU - Nikačević, Nikola AU - Bukur, Dragomir B. PY - 2017 UR - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/3688 AB - We investigate effects of catalyst activity, catalyst particle shape (sphere, slab, and hollow cylinder), size (i.e., diffusion length), catalyst distribution (uniform vs eggshell type distribution for a spherical particle), and process conditions (temperature, pressure, syngas composition, and conversion level) on catalyst effectiveness factor and methane selectivity inside the catalyst pellet. In numerical simulations we utilize kinetic parameters for CO consumption rate and CH4 formation rate determined from experiments with a highly active Co/Re/gamma-Al2O3 catalyst. It is found that the use of small spherical particles (0.2-0.5 mm) or eggshell distribution for larger spherical particles with catalyst layer thickness less than approximately 0.13 mm is needed to avoid negative impact of diffusional limitations on CH4 selectivity under typical Fischer Tropsch synthesis operating conditions. For monolith reactors with wash-coated catalyst, diffusional limitations can be avoided by using a catalyst layer thickness less than 0.11 nun at base case conditions (473 K, 25 bar, and H-2/CO molar ratio of 2). PB - Amer Chemical Soc, Washington T2 - Industrial & Engineering Chemistry Research T1 - Effects of Catalyst Activity, Particle Size and Shape, and Process Conditions on Catalyst Effectiveness and Methane Selectivity for Fischer-Tropsch Reaction: A Modeling Study EP - 2745 IS - 10 SP - 2733 VL - 56 DO - 10.1021/acs.iecr.7b00053 ER -
@article{ author = "Mandić, Miloš and Todić, Branislav and Zivanić, Ljiljana and Nikačević, Nikola and Bukur, Dragomir B.", year = "2017", abstract = "We investigate effects of catalyst activity, catalyst particle shape (sphere, slab, and hollow cylinder), size (i.e., diffusion length), catalyst distribution (uniform vs eggshell type distribution for a spherical particle), and process conditions (temperature, pressure, syngas composition, and conversion level) on catalyst effectiveness factor and methane selectivity inside the catalyst pellet. In numerical simulations we utilize kinetic parameters for CO consumption rate and CH4 formation rate determined from experiments with a highly active Co/Re/gamma-Al2O3 catalyst. It is found that the use of small spherical particles (0.2-0.5 mm) or eggshell distribution for larger spherical particles with catalyst layer thickness less than approximately 0.13 mm is needed to avoid negative impact of diffusional limitations on CH4 selectivity under typical Fischer Tropsch synthesis operating conditions. For monolith reactors with wash-coated catalyst, diffusional limitations can be avoided by using a catalyst layer thickness less than 0.11 nun at base case conditions (473 K, 25 bar, and H-2/CO molar ratio of 2).", publisher = "Amer Chemical Soc, Washington", journal = "Industrial & Engineering Chemistry Research", title = "Effects of Catalyst Activity, Particle Size and Shape, and Process Conditions on Catalyst Effectiveness and Methane Selectivity for Fischer-Tropsch Reaction: A Modeling Study", pages = "2745-2733", number = "10", volume = "56", doi = "10.1021/acs.iecr.7b00053" }
Mandić, M., Todić, B., Zivanić, L., Nikačević, N.,& Bukur, D. B.. (2017). Effects of Catalyst Activity, Particle Size and Shape, and Process Conditions on Catalyst Effectiveness and Methane Selectivity for Fischer-Tropsch Reaction: A Modeling Study. in Industrial & Engineering Chemistry Research Amer Chemical Soc, Washington., 56(10), 2733-2745. https://doi.org/10.1021/acs.iecr.7b00053
Mandić M, Todić B, Zivanić L, Nikačević N, Bukur DB. Effects of Catalyst Activity, Particle Size and Shape, and Process Conditions on Catalyst Effectiveness and Methane Selectivity for Fischer-Tropsch Reaction: A Modeling Study. in Industrial & Engineering Chemistry Research. 2017;56(10):2733-2745. doi:10.1021/acs.iecr.7b00053 .
Mandić, Miloš, Todić, Branislav, Zivanić, Ljiljana, Nikačević, Nikola, Bukur, Dragomir B., "Effects of Catalyst Activity, Particle Size and Shape, and Process Conditions on Catalyst Effectiveness and Methane Selectivity for Fischer-Tropsch Reaction: A Modeling Study" in Industrial & Engineering Chemistry Research, 56, no. 10 (2017):2733-2745, https://doi.org/10.1021/acs.iecr.7b00053 . .