Dynamic flowsheet modeling of polymerization processes using POLYRED

Ochs, Stefan; Rosendorf, Pavel; Hyánek, I.; Zhang, Xiaomang; Ray, W. Harmon

doi:10.1016/0098-1354(95)00200-6

Cited by 12 publications

(15 citation statements)

References 3 publications

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“…Generally, popular models of macromixing are compartmental models (Villermaux, 1991). In particular, Marini and Georgakis (1984a,b) and later Ochs et al (1996) used a three-compartment model that was essentially one large CSTR and two small CSTRs with some recycle from the large CSTR to the small ones. This model is a compartment representation of the imperfect mixing of the inlet jet with the liquid bulk (Marini and Georgakis, 1984b).…”

Section: Macromixing In Ldpe Reactorsmentioning

confidence: 99%

“…Because of the imperfect mixing in these autoclave reac- tors, compartmental models, which "divide" the reactors into different parts corresponding to the mixing in that part, are widely employed (Marini and Georgakis, 1984a,b;Ochs et al, 1996). The idea is that the whole reactor can be modeled as a combination of "ideal" reactors with exchange of mass and energy between each of the ideal reactors.…”

Section: Introductionmentioning

confidence: 99%

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Simulations of a LDPE reactor using computational fluid dynamics

1997

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Section: Macromixing In Ldpe Reactorsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Simulations of a LDPE reactor using computational fluid dynamics

1997

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“…Furthermore, since it is easy to implement as part of larger-scale reactor modeling, it is the standard methodology used in process simulation packages (see, for example, Refs. 90,91). For discussion regarding the final step of model development, substitution of the kinetic expressions for the moments into reactor balances, see Section 4.4.3.…”

Section: Methods Of Momentsmentioning

confidence: 99%

Free‐Radical Polymerization: Homogeneous

Hutchinson¹

2005

Handbook of Polymer Reaction Engineering

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Free-radical polymerization (FRP) is one of the most important commercial processes for preparing high molecular weight polymers. It can be applied to almost all vinyl monomers under mild reaction conditions over a wide temperature range and, although requiring the absence of oxygen, is tolerant of water. Multiple monomers can be easily copolymerized via FRP, leading to the preparation of an endless range of copolymers with properties dependent on the proportion of the incorporated comonomers. This chapter will provide an overview of the kinetics and mechanisms, and the techniques used to construct mathematical representations of bulk and solution FRP. The description will also serve as a good base for the suspension and emulsion FRP chapters that follow. FRP Properties and ApplicationsPolymers produced via free-radical chemistry include the following major families:Low-density polyethylene (LDPE) and copolymers, used primarily in films and packaging applications. LDPE has density of <0.94 g cm À3 , and is produced via high-pressure free-radical polymerization; polyethylenes of higher density (and polypropylene) are produced via transition metal catalysis, as described elsewhere (see Chapter 8). Poly(vinyl chloride) and copolymers, used primarily to produce pipe and fittings, flooring material, and films and sheet. Polystyrene and its co-and terpolymers with acrylonitrile and butadiene. Homopolymer is used for packaging and containers, while the acrylonitrile-containing polymers are used for various molded products in the appliance, electronics, and

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“…A detailed discussion of POLYRED capabilities is presented elsewhere (Hyanek et al, 1995;Zacca et al, 1995;Ochs et al, 1996).…”

Section: Numerical Solutionmentioning

confidence: 99%