Japanese National Project for the Innovation of Industrial Polypropylene Process Technology

Terano, Minora; Suehiro, Keigo; Sagae, Takehiro; Tobita, Etsuo

doi:10.1016/s0167-2991(06)80426-x

Cited by 2 publications

(1 citation statement)

References 2 publications

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“…Numerous studies on bed hydrodynamics and polymerization reaction in FBRs have been concerned, but not much effort was devoted to the performance investigation in olefin polymerization reactor. In addition, there is a fast growing interest in developing novel and economic polymer production process, such as NPPP (omitting the pelletizing steps compared to traditional pelletizing PE process, TPPP). ,− It should be noted that BES area with distinct solid motions exists in large-scale FBR, so exploring the local and averaged solid flow patterns in the region is the prerequisite to understand the intrinsic mechanisms of solid particle motions. However, the investigations are fairly insufficient for predicting the temperature variation and particle flow patterns, especially in pilot-plant scale olefin polymerization FBR.…”

Section: Introductionmentioning

confidence: 99%

An Insight into the Temperature Field and Particle Flow Patterns in a Fluidized Bed Reactor for Nonpelletizing Polyethylene Process Using a 3D CFD-PBM Model

Che¹,

Tian²,

Liu³

et al. 2016

Ind. Eng. Chem. Res.

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This work aims at exploring the temperature and polyethylene (PE) particle flow patterns in a pilot-plant fluidized bed reactor via 3D CFD modeling approach. A Eulerian–Eulerian model involving ethylene polymerization kinetics is integrated with population balance model to investigate the issues for both traditional pelletizing PE process (TPPP) and nonpelletizing PE process (NPPP). The results show that the regions with large temperature gradients have been observed in top area. The revealed particle flow patterns in two cases are analyzed using four typical flow patterns (patterns a–d) reported in literature. PE particles are vigorously contacted and mixed along the lateral and vertical planes of the reactor in TPPP (patterns b–d). Solid dispersion is intensely enhanced in the bed vertical direction (pattern d), and the flow patterns show larger circular flow (pattern a) in the radial direction under NPPP due to the larger particle size and gas velocity.

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