Dynamic analysis of millimetre-scale fixed bed reactors for Fischer-Tropsch synthesis

Mandić, Miloš; Dikić, Vladimir; Petkovska, Menka; Todić, Branislav; Bukur, Dragomir B.; Nikačević, Nikola M.

doi:10.1016/j.ces.2018.07.052

Cited by 13 publications

(8 citation statements)

References 40 publications

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“…The μPBRs also play the pivotal roles in kinetics study and fast catalyst screening 8,9 . Outstandingly, the μPBRs have been successfully applied to various gas–liquid–solid reactions, including hydrogenation, 10 oxidation, 11 and Fischer‐Tropsch synthesis, 12 and so on.…”

Section: Introductionmentioning

confidence: 99%

Nature and characteristics of gas–liquid flow regimes in a micro‐packed bed reactor

et al. 2023

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Micro-packed bed reactors (μPBRs) have the advantages of high heat and mass transfer efficiency and excellent safety, and they have been successfully applied to hydrogenation and oxidation reactions. However, the study of gas-liquid flow regimes in the μPBR, which is essential for the mass transfer modeling and reactor scale-up, is still insufficient due to the limitation of micro-scale and complexity of capillary force. In this work, the flow regimes in the two-dimensional μPBR were systematically studied by visual method utilizing a high-performance camera. Four typical flow regimes and characteristics were captured, and flow regime transition was revealed. Effects of gas and liquid superficial velocities, liquid physical properties, and particle sizes on liquid spreading areal fraction and pressure drop were investigated. Flow regime transition correlation of churn flow and pseudo-static flow in the μPBR was provided for the first time based on the summary of the current and previous published results.

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Section: Introductionmentioning

confidence: 99%

Nature and characteristics of gas–liquid flow regimes in a micro‐packed bed reactor

et al. 2023

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“…Micro‐packed bed reactors (μPBRs) were derived from the miniaturization of conventional packed bed and filled the various solid particles or structure elements in which the particle diameters or pore sizes were usually lower than 500 μm 4,5 . Considering the benefits of excellent heat and mass transfer, 6–8 the μPBRs have been applied for kinetics study, 9 catalyst screening, 10 hydrogenation, 11 oxidation, 12 and Fischer‐Tropsch synthesis 13 …”

Section: Introductionmentioning

confidence: 99%

“…4,5 Considering the benefits of excellent heat and mass transfer, [6][7][8] the μPBRs have been applied for kinetics study, 9 catalyst screening, 10 hydrogenation, 11 oxidation, 12 and Fischer-Tropsch synthesis. 13 Mass transfer studies, as one of the crucial parts in fundamental researches, were the hotspots in the realm of reactor design, which was beneficial for the cognitive enhancement and better understanding of the scaling-up processes. [14][15][16] Several mass transfer studies have been carried out in the μPBRs, including gas-liquid, liquid-solid, and gas-liquid-solid systems.…”

Section: Introductionmentioning

confidence: 99%

Local and global gas–liquid mass transfer in a micro‐packed bed reactor utilizing a noninvasive colorimetric technique

Liu,

Xie,

Luo

et al. 2023

AIChE Journal

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Micro‐packed bed reactor (μPBR) presents great potential in the field of multiphase reactions due to the features of safety and high efficiency. However, the deeper cognition of mass transfer needs to be taken into consideration that is the foundation of reactor design. In this work, local and global gas–liquid mass transfer in the μPBR were studied utilizing a noninvasive colorimetric technique. In reactor level, the qualitative and quantitative comparisons were conducted; in particle level, liquid flow and mass transfer textures were assessed for the first time. The diversities of local mass transfer characteristics from temporal and spatial dimensions were obtained, and the heterogeneity of local and global mass transfer was revealed. The predicted correlations of in μPBR with churn flow and pseudo‐static flow were established with deviations generally within ±18%. This study contributes to improve the understanding of mass transfer and points out the process intensification direction of μPBR.

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“…The main products formed in the Fischer–Tropsch process range from methane to higher alkanes and aliphatic alcohols. , The process is critical to the production of liquid fuels and chemicals from carbonaceous feedstock. , Despite the research that has been done to date, the need exists for further improvement in commercial Fischer–Tropsch processes. , For example, a great deal of effort has been made to develop more efficient Fischer–Tropsch reaction systems and catalyst systems, which will eventually lead to an increase in the selectivity for high-value hydrocarbon products from the Fischer–Tropsch processes. , In particular, iron, cobalt, and ruthenium based catalysts have been developed for use in various reactor types, , and much progress has been made in preparation technology. , …”

Section: Introductionmentioning

confidence: 99%

“…29,30 For example, a great deal of effort has been made to develop more efficient Fischer−Tropsch reaction systems and catalyst systems, which will eventually lead to an increase in the selectivity for high-value hydrocarbon products from the Fischer−Tropsch processes. 31,32 In particular, iron, cobalt, and ruthenium based catalysts have been developed for use in various reactor types, 33,34 and much progress has been made in preparation technology. 35,36 There is a significant difference in the distribution of the hydrocarbon products formed from different Fischer−Tropsch reaction systems.…”

Section: Introductionmentioning

confidence: 99%

Thermodynamic Equilibrium Analysis of Product Distribution in the Fischer–Tropsch Process Under Different Operating Conditions

Chen

Yang

2019

ACS Omega

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Thermodynamic equilibrium analysis is necessary to provide a fundamental understanding of the distribution of the products formed in the Fischer–Tropsch process. The thermodynamic equilibrium distribution of the products formed at constant temperature and pressure was studied based on the minimization of the total Gibbs free energy of the system. The effects of temperature, pressure, and feed ratio on the product distribution were investigated under typical operating conditions. The distribution of the total products obtained from the reactions of added ethylene or ethanol was also studied. The results indicated that the products formed in a state of thermodynamic equilibrium follow Anderson–Schulz–Flory’s general polymerization distribution at carbon numbers greater than about three. Both olefins and paraffins are primary products and there are essentially no alcohol and water at high degrees of conversion when the conditions for thermodynamic equilibrium are satisfied. The olefins formed in the Fischer–Tropsch process consist essentially of propylene. The product distribution is very sensitive to feed composition, and to temperature and pressure to a lesser extent. The product spectrum can be described broadly by the probability of chain growth relative to chain termination. This parameter decreases with increasing temperature, the feed ratio of hydrogen to carbon monoxide, and after the addition of ethanol to the feed, but increases with increasing pressure and after the addition of ethylene to the feed. An increase in reaction temperature results in a shift in selectivity towards low carbon number hydrocarbons and more hydrogenated products.

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Dynamic analysis of millimetre-scale fixed bed reactors for Fischer-Tropsch synthesis

Cited by 13 publications

References 40 publications

Nature and characteristics of gas–liquid flow regimes in a micro‐packed bed reactor

Nature and characteristics of gas–liquid flow regimes in a micro‐packed bed reactor

Local and global gas–liquid mass transfer in a micro‐packed bed reactor utilizing a noninvasive colorimetric technique

Thermodynamic Equilibrium Analysis of Product Distribution in the Fischer–Tropsch Process Under Different Operating Conditions

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