Solid-liquid contacting effectiveness in trickle bed reactors

Colombo, Alessia; Baldi, Giancarlo; Sicardi, Silvio

doi:10.1016/0009-2509(76)85019-1

Cited by 126 publications

(100 citation statements)

References 11 publications

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“…s (Columbo et al, 1976;Sicardi et al, 1980;Dudukovic and Mills, 1986). Average catalyst particle size was about 500 pm, eliminating internal diffusion and film mass transfer effects based on calculations given above.…”

Section: Methodsmentioning

confidence: 96%

Methanol synthesis in a trickle‐bed reactor

et al. 1990

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A novel approach to methanol production from coal-derived synthesis gas is cocurrent gas and mineral oil feed flowing over a packed bed of catalyst in the trickle flow regime. Production rates of 0.7 to 2 k g / h . kg cat were obtained for a H,/(CO + CO, ) ratio of 1 and at space velocities of 2,000 to 25,000 L / h . kg cat. Slurry reactor and bubble column productivities were substantially less for H,/(CO + CO,) ratios of 0.55 to 2.3 at similar conditions as the trickle-bed reactor. Reaction temperature was 250°C in three types of reactors but 240°C in gas-liquid phase Berty reactor; the pressure in the slurry and bubble column reactors was 52-70 atm and in Berty Reactor 77.5-100 atm, whereas 70 atm pressure was used in the trickle bed. Differences in production rates and conversions can be explained by the extent of backmixing in trickle-bed and slurry reactors operating at the same conditions.

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Section: Methodsmentioning

confidence: 96%

Methanol synthesis in a trickle‐bed reactor

et al. 1990

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“…The vent gas was discharged down to atmospheric pressure by a pressure regulator and analyzed online by a gas chromatograph equipped with a TCD. In order to ensure complete wetting of the catalyst, the liquid rate in this study was maintained at 2.0 mL·min −1 [13]- [15]. About 10 g of catalyst was loaded in the reactor.…”

Section: Experimental Schemementioning

confidence: 99%

Absorption Enhanced Methanol Synthesis in a Trickle Bed Reactor over Cu/Zn/Al<sub>2</sub>O<sub>3</sub> Catalyst

Shanghai

2015

MSCE

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Methanol synthesis in a trickle bed reactor with tetraethylene glycol dimethyl ether (TEGDME) as the liquid phase over a Cu/Zn/Al2O3 catalyst was investigated. The pressure was kept constant at 5.0 MPa, while the temperature ranged from 230˚C to 260˚C and the mass space velocity varied between 294 L·Kg −1 ·h −1 and 1655 L·Kg −1 ·h −1 . The effects of temperature and space velocity on CO conversion and methanol productivity were studied. Methanol synthesis processes in trickle bed with the TEGDME and paraffin oil as liquid phase were compared with the fixed bed process. The results indicated that the optimal temperature was approximately 240˚C. When the space velocity was increased, the CO conversion decreased while the methanol productivity increased. The liquid introduced can help to keep the reactor nearly isothermal. For methanol synthesis in trickle-bed reactor, TEGDME was better than paraffin oil. Effect of TEGDME on the reaction was twofold. On one hand, it absorbs the methanol and speeds up the reaction. On the other hand, it also increases the mass transfer resistance and hinders the reaction.

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“…The kinetic model for the reaction was based on a first-order reaction according to the equation below [6]:…”

Section: Mathematical Modellingmentioning

confidence: 99%

Application of Laplace Transform for a Gas-Liquid-Solid Trickle Bed Reactor by Using the Tracer Technique

Silva¹

2013

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Experimental evaluation and dynamic modelling were presented for a liquid flow (H 2 O + NaOH tracer) on solid particles in a trickle bed reactor. One-dimensional dynamic mathematical model has been described to study the gas-liquid-solid process in which the liquid phase with the NaOH tracer is treated as a continuum. The physical model has been analyzed, including the formulation of initial and boundary conditions and the description of the solution methodology. An experimental setup to measure the concentrations of the NaOH tracer has been performed. The concentration measurements of this NaOH tracer have been performed in a fixed be reactor on trickling flow of the liquid phase for a range of operating conditions. The axial dispersion (D ax ) of the liquid phase, liquid-solid mass transfer (k LS ) coefficient and partial wetting efficiency (f e ) were chosen as the hydrodynamic parameters of the proposed mathematical model. Such parameters have been optimized with experimental measurents of the NaOH tracer at the exit of the trickle-bed reactor. The optimized parameters (D ax , k LS and f e ) were calculated simultaneously by using the theoretical model with minimization of the objective function. Results of the proposed mathematical model have been presented and compared as of the two experimental cases. These hydrodynamic parameters were fitted by means of the empirical correlations.

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Solid-liquid contacting effectiveness in trickle bed reactors

Cited by 126 publications

References 11 publications

Methanol synthesis in a trickle‐bed reactor

Methanol synthesis in a trickle‐bed reactor

Absorption Enhanced Methanol Synthesis in a Trickle Bed Reactor over Cu/Zn/Al<sub>2</sub>O<sub>3</sub> Catalyst

Application of Laplace Transform for a Gas-Liquid-Solid Trickle Bed Reactor by Using the Tracer Technique

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Solid-liquid contacting effectiveness in trickle bed reactors

Cited by 126 publications

References 11 publications

Methanol synthesis in a trickle‐bed reactor

Methanol synthesis in a trickle‐bed reactor

Absorption Enhanced Methanol Synthesis in a Trickle Bed Reactor over Cu/Zn/Al&lt;sub&gt;2&lt;/sub&gt;O&lt;sub&gt;3&lt;/sub&gt; Catalyst

Application of Laplace Transform for a Gas-Liquid-Solid Trickle Bed Reactor by Using the Tracer Technique

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Absorption Enhanced Methanol Synthesis in a Trickle Bed Reactor over Cu/Zn/Al<sub>2</sub>O<sub>3</sub> Catalyst