Investigation of hydrogenation and mass transfer performance in micropacked beds with highly active monolithic catalysts

Ma, Chi; Huang, Miaoliang; Yin, Jianjun; Lou, Fengyan; Zhang, Jisong

doi:10.1016/j.ces.2022.117477

Cited by 9 publications

(9 citation statements)

References 42 publications

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“…Micro‐packed bed reactors (μPBRs), as the typical representative of multiphase packed bed reactors, were filled with the various solid particles randomly or structured elements systematically 1–3 . In μPBRs, the particle diameters were usually smaller than 500 μm and gas and liquid flow in the co‐current mode was operated 4 .…”

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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“…The suspension in the pores of NFs can be blown out by air circulation. 43 However, at a high suspension flow rate (from 162 to 198 mL min −1 ), the decrease in loading weight was insignificant by increasing the flow rate. Fig.…”

Section: Resultsmentioning

confidence: 98%

“…According to our previous study, the common experimental conditions were chosen for comparing the catalysts with various preparation methods and loading weights of coatings. 43 The reaction temperature, system pressure, AMS initial concentration, and gas flow rate were set as 70 °C, 1.0 MPa, 10 wt%, and 20 mL min −1 , respectively. The liquid flow rate of 0.05, 0.1, 0.2, 0.3, 0.4, and 0.5 mL min −1 was chosen for the experiments.…”

Section: Methodsmentioning

confidence: 99%

Electrodeposition of activated carbon on Ni foam for monolithic catalysts and intensification of hydrogenation performance in a micropacked bed

Liu

Lou

et al. 2023

React. Chem. Eng.

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“…Considering that the two catalysts had similar Pd nanoparticle sizes and loadings, the results was attributed to the different mass transfer efficiencies for various wettability catalysts. Ma et al 26 prepared the Pd/nickel foam catalysts with different coating materials and measured the mass transfer and reaction performance by α‐methylstyrene (AMS) hydrogenation. The experimental results showed that hydrophobic CeO 2 coating had higher conversion of AMS and ( ka ) OV compared with the hydrophilic Al 2 O 3 coating.…”

Section: Introductionmentioning

confidence: 99%

Hydrodynamics and mass transfer enhancement of gas–liquid flow in micropacked bed reactors: Effect of contact angle

et al. 2022

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Pressure drop, residence time distribution, dispersive behavior, liquid holdup, and mass transfer performance of gas–liquid flow in micropacked bed reactors (μPBRs) with different contact angles (CA) of particles are studied. The value of pressure drop for three types of beads can be obtained: copper beads (CA = 88.1°) > stainless steel beads (CA = 70.2°) > glass beads (CA = 47.1°). The liquid axial dispersion coefficient is 1.58 × 10−6 to 1.07 × 10−5 m2/s for glass beads and copper beads, which is smaller than those of trickle bed reactors. The liquid holdup of 400 μm copper beads is larger than that of 400 μm glass beads. The ratio of effective interfacial area enhancement is evaluated up to 55% for big contact angle beads compared with the hydrophilic glass beads. In addition, correlations of pressure drop, liquid holdup, and effective interfacial area in μPBRs with different wettability beads are developed and predicted values are in agreement with the experimental data.

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Investigation of hydrogenation and mass transfer performance in micropacked beds with highly active monolithic catalysts

Cited by 9 publications

References 42 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

Electrodeposition of activated carbon on Ni foam for monolithic catalysts and intensification of hydrogenation performance in a micropacked bed

Hydrodynamics and mass transfer enhancement of gas–liquid flow in micropacked bed reactors: Effect of contact angle

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