Fines deposition dynamics in gas–liquid trickle‐flow reactors

Validation of a novel open-source work-flow for the simulation of packed-bed reactors

“…cylinders and trilobes) can be treated only with cumbersome strategies. This is particularly important because these exotic shapes, such as trilobes, are becoming more and more popular [27][28][29][30][31][32][33][34][35][36][37][38][39][40]. Other interesting alternatives are based on the use of Monte Carlo methods [41][42][43] that solve some of the above mentioned issues.…”

Stretching operational life of trickle‐bed filters by liquid‐induced pulse flow

“…3 However, there is no single work in the literature about twophase flow in which coupling between deposition and release processes of fine particles in trickle-bed reactors has been attempted. Moreover, to the best of our knowledge, the concept of induced pulsing as a potential means for struggling against filtration in trickle beds has never been explored in the past.…”

“…Currently, physical models linking gas-liquid flow to the filtration process in trickle beds neglected the possible release of fine particles 3,4,25,26 and the potential beneficial impact of induced pulsing to reduce the plugging in trickle beds. An attempt has therefore been made in this work in which the authors sought to develop a dynamic multiphase flow model based on the volume average mass, momentum, and species balance equations.…”

“…Thus, a limited number of experimental works on the process of fines accumulation 2,5,23,24 and only some attempts concerning the modeling and conceptualization of dynamics of fines deposition have been reported. 3,4,25,26 The few available experimental studies showed that the pressure drop increases monotonically with the concentration of fine particles and this increase correlates well with the reduction in effective porosity arising from the accumulation of the fines. All the experimental studies suggest that the major change resulting from deposition of fine particles involves the effective size and geometry of catalyst particles, the surface characteristics of the catalyst particles, the porosity, and the effective porosity of the bed.…”

Deposition and aggregation of Brownian particles in trickle‐bed reactors

“…In contrast, the literature still remains rather scanty with respect to the complex hydrodynamics and surface phenomena involved in the plugging with fine particles of packed‐bed gas–liquid–solid reactors despite the critical operational problem of fines in the petroleum refining industry. Thus, a limited number of experimental works on the process of fines accumulation6, 7, 12, 13 and only some attempts concerning the modeling and conceptualization of fines deposition dynamics have been reported 14–19. The few available experimental studies showed that the pressure drop increases monotonically with the concentration of fine particles and this increase correlates well with the reduction in effective porosity arising from the accumulation of fines.…”