Studies on product distributions of iron and cobalt catalyzed Fischer–Tropsch synthesis

Patzlaff, Jürgen; Liu, Y.; Graffmann, C.; Gaube, Johann

doi:10.1016/s0926-860x(99)00167-2

Cited by 195 publications

(139 citation statements)

References 29 publications

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“…The products from Fischer-Tropsch process generally follow the statistical hydrocarbon distribution-Anderson-Schulz-Flory (ASF) distribution [63]. The molar fraction M of a certain carbon number of n can be described as: (18) So product distribution can be determined by the chain growth probability α value.…”

Section: Fischer-tropsch Synthesismentioning

confidence: 99%

Application of Fischer–Tropsch Synthesis in Biomass to Liquid Conversion

2012

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Fischer-Tropsch synthesis is a set of catalytic processes that can be used to produce fuels and chemicals from synthesis gas (mixture of CO and H 2 ), which can be derived from natural gas, coal, or biomass. Biomass to Liquid via Fischer-Tropsch (BTL-FT) synthesis is gaining increasing interests from academia and industry because of its ability to produce carbon neutral and environmentally friendly clean fuels; such kinds of fuels can help to meet the globally increasing energy demand and to meet the stricter environmental regulations in the future. In the BTL-FT process, biomass, such as woodchips and straw stalk, is firstly converted into biomass-derived syngas (bio-syngas) by gasification. Then, a cleaning process is applied to remove impurities from the bio-syngas to produce clean bio-syngas which meets the Fischer-Tropsch synthesis requirements. Cleaned bio-syngas is then conducted into a Fischer-Tropsch catalytic reactor to produce green gasoline, diesel and other clean biofuels. This review will analyze the three main steps of BTL-FT process, and discuss the issues related to biomass gasification, bio-syngas cleaning methods and conversion of bio-syngas into liquid hydrocarbons via Fischer-Tropsch synthesis. Some features in regard to increasing carbon utilization, enhancing catalyst activity, maximizing selectivity and avoiding catalyst deactivation in bio-syngas conversion process are also discussed.

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Section: Fischer-tropsch Synthesismentioning

confidence: 99%

Application of Fischer–Tropsch Synthesis in Biomass to Liquid Conversion

2012

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“…Many studies focused on these deviations from the ideal ASF distribution and some researchers have been successful in representing the deviation by superposition of two ASF distributions [7±9]. Theories based in the superposition of two ASF distributions rely on the dual site theory [3], secondary chain growth of readsorbed alkenes theory [6,10], and the dual mechanism of chain growth theory [11,12].…”

Section: Introductionmentioning

confidence: 99%

Polymerization Kinetics of Fischer‐Tropsch Reaction on Iron Based Catalysts and Product Grade Optimization

Fernandes

2005

Chem Eng & Technol

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The polymerization kinetics of Fischer-Tropsch reactions on a K-promoted Fe catalyst was studied. To represent the product distribution, a kinetic model was developed based on alkyl and alkenyl mechanisms for hydrocarbon chain propagation, which were assumed to occur simultaneously in the Fischer-Tropsch synthesis. The conclusion was drawn that superimposed Anderson-Schulz-Flory (ASF) distributions with different chain growth probabilities, on iron catalysts, can be the result of different chain growth mechanisms. The polymerization mechanism was used to obtain the product distribution for several conditions, and the optimum conditions for the production of transportation fuels were found.

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“…The parameter estimates together with their 95% individual confidence intervals are given in Table 3. Activation energies for the reverse elementary steps, calculated with the reaction enthalpy at 623 K with Equation (19), are also included in this table. Individual reaction enthalpies for the different carbon numbers are used and, hence, different reverse activation energies are obtained.…”

Section: Regression Results and Discussionmentioning

confidence: 99%

“…Such deviations have been observed for iron, cobalt and ruthenium catalysts and have been interpreted as the superposition of two or more ASF distributions, attributed to different factors, e.g., the existence of structurally different sites leading to different growth probabilities [18] or the existence of more than one chain growth mechanism [19]. In general, the most accepted explanation is the re-adsorption and re-incorporation of 1-alkenes in the chain growth [17,[19][20][21].…”

Section: Introductionmentioning

confidence: 98%

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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Studies on product distributions of iron and cobalt catalyzed Fischer–Tropsch synthesis

Cited by 195 publications

References 29 publications

Application of Fischer–Tropsch Synthesis in Biomass to Liquid Conversion

Application of Fischer–Tropsch Synthesis in Biomass to Liquid Conversion

Polymerization Kinetics of Fischer‐Tropsch Reaction on Iron Based Catalysts and Product Grade Optimization

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

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