Enhancement of gas absorption rate as a function of the particle size in slurry reactors

Nagy, Endre; Blickle, T.; Ujhidy, A.

doi:10.1016/0009-2509(86)87135-4

Cited by 8 publications

(3 citation statements)

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“…This model is conceptually different from that of Yagi and Hikita and considers particles to be nonuniformly spaced in the direction of diffusion, rather than perpendicular to it. The work of Nagy , and Mehra on the development of a 1-D heterogeneous model for three-phase mass transfer is also relevant here. A detailed comparative study of various methodologies used to analyze the effect of solid dissolution in the film would be useful.…”

Section: Reacting Particlesmentioning

confidence: 99%

Gas Absorption in Slurries Containing Fine Particles: Review of Models and Recent Advances

Ramachandran

2007

Ind. Eng. Chem. Res.

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Gas absorption in slurries that contain fine particles is frequently encountered in a variety of situations in the chemical industry. Research on the modeling of these systems was first started almost 40 years ago by Professor Sharma's group and the pioneering first paper in the field originated from the Bombay UDCT. The enhancement in gas absorption was shown when the particle size is smaller than the film thickness for mass transfer. Many developments have occurred in this field since then, both on the modeling of such systems and application of the concept of the “micro-phase” enhancement to practical systems. It is the objective of this paper to take stock of these developments and provide a review on the modeling of these systems. The systems are classified into three main categories: (i) reacting particles, (ii) adsorbing particles, and (iii) catalytic particles. The modeling aspects of each class is discussed in detail and critically evaluated. Systems where the products form as a microphase are also discussed briefly.

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Section: Reacting Particlesmentioning

confidence: 99%

Gas Absorption in Slurries Containing Fine Particles: Review of Models and Recent Advances

Ramachandran

2007

Ind. Eng. Chem. Res.

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“…However, if the third phase is a solid one (Mehra et al, 1988), the size of the particle can be smaller than the value of 6. If the particle size is of the same order of magnitude as the "film-thickness" is at the gas-(or solid-) liquid interface (Figure lb), the spherical effect can no longer be neglected (Nagy et al, 1986). To define this effect, the mass balance (Eq.…”

Section: Absorption Rate At Spherical Gas-(or Solid-) Liquid Interfacmentioning

confidence: 99%

“…The absorption rate into slurries containing fine solid particles (catalysts or reactants) has been investigated intensively from both theoretical and experimental points of view in the last decade (Alper et al, 1981;Pal et al, 1982;Janakiraman and Shama, 1985;Nagy et al, 1986;Holstvoogd et al, 1986Holstvoogd et al, , 1988. Recent investigations have shown that the gas absorption rate can be substantially increased using a dispersed second liquid phase with permeability and/or solubility higher than that of the continuous phase.…”

Section: Introductionmentioning

confidence: 99%