Kinetics of the Fischer-Tropsch reaction on a precipitated promoted iron catalyst. 1. Experimental procedure and results

Lox, E.S.; Froment, Gilbert F.

doi:10.1021/ie00013a010

Cited by 86 publications

(78 citation statements)

References 27 publications

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“…Within this paper, the model regression is limited to the data at 623 K only, because the most experimental data are available at this temperature. The description of the experimental set-up and the characterization of the catalyst have been published previously [23][24][25]. However, some basic information is summarized here.…”

Section: Methodsmentioning

confidence: 99%

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Extension of the Single-Event Methodology to Metal Catalysis: Application to Fischer-Tropsch Synthesis

Lozano-Blanco

Surla

Thybaut

et al. 2010

Oil Gas Sci. Technol. – Rev. IFP Energies nouvelles

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Résumé -Extension de la méthodologie des événements constitutifs à la catalyse métallique : Application à la synthèse Fischer-Tropsch -La méthodologie par événements constitutifs a été étendue à la catalyse métallique en utilisant la synthèse Fischer-Tropsch sur un catalyseur au fer comme cas d'étude. Le mécanisme réactionnel a été décomposé en étapes élémentaires qui peuvent être classées par type de réactions, telles que l'élimination réductrice, l'élimination d'hydrure en β, et l'insertion de groupe méthylène. Un code de calcul a été développé pour générer le réseau réactionnel impliquant ces étapes élémentaires. La représentation des réactifs et des espèces intermédiaires prend en compte explicitement les liaisons carbone-métal et inclut la présence d'atomes d'oxygène. Le modèle a été validé sur une base de données obtenues sur un catalyseur à base de fer à 623 K, sur une plage de 0,6 à 2,1 MPa, un ratio H 2 /CO en entrée variant de 2 à 6. Quatorze paramètres, dont 10 énergies d'activation et 4 enthalpies de chimisorption atomique ont été ajustés aux données expérimentales. Les tendances observées expérimentalement pour les rendements en alcanes et alcènes-1 en fonction du nombre de carbones sont correctement reproduites, ainsi que les rendements molaires des produits non-hydrocarbures. Abstract -Extension of the Single-Event Methodology to Metal Catalysis: Application to FischerTropsch Synthesis -The single-event methodology has been extended to metal catalysis using Fischer-Tropsch synthesis on an iron-based catalyst as case study. The reaction mechanism has been assessed in terms of elementary steps that could be categorized in reaction families

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Section: Methodsmentioning

confidence: 99%

“…Experimentally, the hydrocarbon wax was analyzed and revealed 1-alkenes and n-alkanes up to carbon number 100 [12,24,25].…”

Section: Methodsmentioning

confidence: 99%

Extension of the Single-Event Methodology to Metal Catalysis: Application to Fischer-Tropsch Synthesis

Lozano-Blanco

Surla

Thybaut

et al. 2010

Oil Gas Sci. Technol. – Rev. IFP Energies nouvelles

View full text Add to dashboard Cite

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“…Numerous studies on the FTS reaction mechanism and kinetics have been conducted to date. Many attempts have been done for the rate equations describing the overall FT reaction rate [3][4][5][6][7][8][9][10]. In spite of these efforts there is a lack of comprehensive kinetic models which could be used for process simulation and optimization studies.…”

Section: Co ⎯⎯ → +mentioning

confidence: 99%

A Comprehensive Kinetic Model of Fischer-Tropsch Synthesis over Supported Cobalt Catalyst

Jalilzadeh

Moqadam

2017

Preprint

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A comprehensive kinetic model of the Fischer-Tropsch synthesis (FTS) is developed in a fixed bed reactor under operating conditions (temperature, 230-235°C, pressure, 20-25 bar, gas hourly space velocity, 4000-5000 cm 3 (STP)/h/gcatalyst ,H2/CO feed molar ratio, 2.1) over a Co based catalyst. Reaction rate equations based on Eley-Rideal (ER) type model for initiation step and Langmuir-Hinshelwood-Hougen-Watson (LHHW) type model for propagation and termination steps of the FTS reactions have been considered and the readsorption of olefins were taken into account. The model that was reported in the literature was modified in order to explain many significant deviations from the ASF distribution. Optimum parameters have been obtained by Genetic Algorithms (GA). The calculated activation energies to produce n-paraffins and 1-olefins were in the range of 82.24 to 90.68 kJ/mol and 100.66 to 105.24 kJ/mol, respectively. The hydrocarbon distribution in FTS reactions was satisfactorily predicted particularly for paraffins.

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“…The Heat Transfer physics module is used to implement equations (20) - (22), (34) - (36) and (40). The dependent variable is the temperature T. It utilizes the pressure and velocity field from the Darcy's Law module and the density, specific heat, and thermal conductivity of the bulk fluid comes from the equations associated with the Coefficent Form PDE.…”

Section: Heat Transfermentioning

confidence: 99%

A Fischer-Tropsch synthesis reactor model framework for liquid biofuels production.

Pratt¹

2012

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Fischer-Tropsch synthesis (FTS) is an attractive option in the process of converting biomass-derived syngas to liquid fuels in a small-scale mobile bio-refinery. Computer simulation can be an efficient method of designing a compact FTS reactor, but no known comprehensive model exists that is able to predict performance of the needed non-traditional designs.This work developed a generalized model framework that can be used to examine a variety of FTS reactor configurations. It is based on the four fundamental physics areas that underlie FTS reactors: momentum transport, mass transport, energy transport, and chemical kinetics, rather than empirical data of traditional reactors.The mathematics developed were applied to an example application and solved numerically using COMSOL. The results compare well to the literature and give insights into the operation of FTS that are then used to propose a new reactor concept that may be suitable for the mobile bio-refinery application. 4 AcknowledgementsI am deeply grateful to the Sandia LDRD office and the ECIS investment area for sponsoring this project.I would also like to thank the following people who participated in this project:• Chris Shaddix for his mentorship, both technically and personally, throughout the project.• Hank Westrich and Sheri Martinez at the LDRD Office for their assistance and encouragement.• Daniel Dedrick for his work in forming the concept of this LDRD topic.• Blake Simmons for providing project management so I could focus on the technical challenges.• Deanna Agosta for financial planning.• Tiffany Vargas and Karen McWilliams at the CA Technical Library for providing and/or helping me find the countless papers and texts used to develop my understanding of everything from the detailed theory to the history and applications of FTS. 5 SummaryLiquid fuels synthesized from renewable CO and H 2 could displace petroleum-based fuels to provide clean, renewable energy for the future. Small scale (<20 bbl/day) reactors for synthetic liquid fuels production are an emerging development area that may enable mobile biomass-to-liquids plants suited for on-demand liquid fuel production from diverse, underutilized, local resources. The design of such a "mobile bio-refinery" is a significant departure from the traditional large-scale industrial designs and requires predictive tools such as computer models to efficiently produce a successful facility. Because existing models inherently incorporate the empirical results of the traditional designs they are not suitable for this application. The need for a model that can examine the drastic design changes and innovations needed for the mobile bio-refinery is clear.The goal of this work was to create a gas-to-liquids synthesis model with the minimum amount of empiricism and assumptions allowed by the current state of the theory, through integrated physics component models across varying length scales, with the ultimate purpose being to enable design of efficient, durable, and flexible small scale and/or novel re...

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Kinetics of the Fischer-Tropsch reaction on a precipitated promoted iron catalyst. 1. Experimental procedure and results

Cited by 86 publications

References 27 publications

Extension of the Single-Event Methodology to Metal Catalysis: Application to Fischer-Tropsch Synthesis

Extension of the Single-Event Methodology to Metal Catalysis: Application to Fischer-Tropsch Synthesis

A Comprehensive Kinetic Model of Fischer-Tropsch Synthesis over Supported Cobalt Catalyst

A Fischer-Tropsch synthesis reactor model framework for liquid biofuels production.

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