Kinetic study of CO hydrogenation on the MgO supported Fe–Co–Mn sol–gel catalyst

Mirzaei, Ali Akbar; Pourdolat, A.; Arsalanfar, Maryam; Atashi, Hossein; Samimi, Abdolreza

doi:10.1016/j.jiec.2012.12.011

Cited by 19 publications

(15 citation statements)

References 25 publications

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“…Kinetic model M 1 was developed based on the assumption that reaction step 2 is the RDS. Thus, the rate of the FTS reaction as regards the rate of the RDS can be written as [13,14] R FTS = -r CO = k…”

Section: Kinetic Equation Developmentmentioning

confidence: 99%

Kinetic Study of Fischer–Tropsch Synthesis Using a Co/CNTs Catalyst

Pour

Karimi²,

Torshizi

et al. 2017

Progress in Reaction Kinetics and Mechanism

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The intrinsic kinetics of the Fischer–Tropsch synthesis reaction in the conversion of synthesis gas into liquid hydrocarbons in a spinning basket reactor over a cobalt catalyst supported on carbon nanotubes were studied. The catalyst was synthesised by the impregnation wetness technique and the reactor tests were done at 215–245 °C, 20 bar, a H2/CO molar ratio of 2 and a gas hourly space velocity of 2.4–12 Nl gcat−1 h−1. To develop an appropriate kinetic model for syngas consumption, five different mechanisms were considered as possibilities for the Fischer–Tropsch reaction, each with a rate-determining step. The rate equations obtained were based on the Langmuir–Hinshelwood–Hougen–Watson model and statistical analyses were used for comparing the resulting values. The activation energies were found to be limited within the range 89–145 kJ mol−1 and the adsorption constants of hydrogen and carbon monoxide were in the range −32 to −76 kJ mol−1 and −13 to −64 kJ mol−1 respectively.

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Section: Kinetic Equation Developmentmentioning

confidence: 99%

Kinetic Study of Fischer–Tropsch Synthesis Using a Co/CNTs Catalyst

Pour

Karimi²,

Torshizi

et al. 2017

Progress in Reaction Kinetics and Mechanism

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show abstract

“…47 In this contribution, we have elucidated base on the lumping 48 method, the kinetic rate of CO consumption over MgO supported 49 Fe-Co-Mn catalyst which was prepared by fusion method in 50 possession of superior mass transfer performance and special 51 reaction behavior in a fixed-bed reactor. Also, we have compared 52 obtained results with works result's in the literatures [29,30] up is shown in Fig. 1.…”

mentioning

confidence: 97%

“…Simulation and optimal 26 design for the industrial FT process with respect to product yield 27 and selectivity requires a deep understanding of hydrodynamics, 28 reaction kinetics, and FT chemistry [17,18]. All these factors have 29 made investigation of the FTS mechanism very difficult and even 30 now there is no consensus about the exact mechanism for this 31 reaction. Literature on the kinetics of the FTS can be divided into 32 two classes: One method focuses in CO or syngas consumption by 33 using the empirical kinetics expressions, the other method is 34 aimed at the product distribution.…”

mentioning

confidence: 99%

“…The mechanisms proposed bases in approach 42 were including the carbide, enolic, and direct insertion theories. 43 Several scholars have reported their comprehensive kinetics 44 containing the syngas consumption and product distributions 45 over iron or cobalt based catalysts on the basis of carbide 46 mechanism [26][27][28][29][30]. 47 In this contribution, we have elucidated base on the lumping 48 method, the kinetic rate of CO consumption over MgO supported 49 Fe-Co-Mn catalyst which was prepared by fusion method in 50 possession of superior mass transfer performance and special 51 reaction behavior in a fixed-bed reactor.…”

mentioning

confidence: 99%

“…7. Difference between calculated and experimental consumption rate of CO (absolute error) against from consumption rate of CO. precipitation methods (activation energy for fusion method is less 302 than sol-gel method and more than co-precipitation method) 303[29,30]. Low activation energy and high rate constant of FTS 304 reaction causes to increase the rate consumption of monoxide 305 carbon.…”

mentioning

confidence: 99%

See 2 more Smart Citations

Kinetics studies of fused Fe–Co–Mn (ternary) catalyst in Fischer–Tropsch synthesis

Torshizi

Mirzaei

Bayat

et al. 2015

Journal of Environmental Chemical Engineering

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Influence of pretreatment conditions on the catalytic behavior and structure of Fe‐Co‐Mn / MgO FTS nanocatalyst: Modeling and optimization using RSM

Arsalanfar

2021

Intl J of Energy Research

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A co-precipitation procedure was employed for the preparation of supported Fe-Co-Mn oxide nanocatalysts. The prepared samples were evaluated for the hydrogenation of carbon monoxide to produce light olefins. After determining the optimum reductant agent type the influence of the other pretreatment factors including both reduction temperature and time, and the optimum flow of reductant agent was studied using response surface methodology (RSM). The modeling process for the selected responses was performed followed by the optimization of reduction parameters was also carried out using the RSM method and historical data design type of DOE. It was found that the pretreatment conditions greatly affect the catalytic performance. The optimization results show that H 2 reductant agent with the reduction temperature of 399 C, reduction time of 12 hours, and H 2 reductant agent flow of 37.52 mL/min are the best pretreatment conditions for achieving the highest catalyst activity and selectivity toward light olefins and lower selectivity toward methane concurrently. The structural properties of prepared specimens were characterized by XRD, TEM, XPS, TGA, DSC, SEM, EDS, and BET. The characterization results reveal that the structural characteristics of the samples were changed under various pretreatment conditions.

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Kinetic study of CO hydrogenation on the MgO supported Fe–Co–Mn sol–gel catalyst

Cited by 19 publications

References 25 publications

Kinetic Study of Fischer–Tropsch Synthesis Using a Co/CNTs Catalyst

Kinetic Study of Fischer–Tropsch Synthesis Using a Co/CNTs Catalyst

Kinetics studies of fused Fe–Co–Mn (ternary) catalyst in Fischer–Tropsch synthesis

Influence of pretreatment conditions on the catalytic behavior and structure of Fe‐Co‐Mn / MgO FTS nanocatalyst: Modeling and optimization using RSM

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