Low-temperature polymerization conditions in a flow-through reactor

Bostandzhiyan, S. A.; Boyarchenko, V. I.; Zhirkov, P. V.; Zinenko, Zh. A.

doi:10.1007/bf00908146

Cited by 11 publications

(4 citation statements)

References 4 publications

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“…For simplicity, a symmetric heat removal on the lateral surfaces of the reactor (r ¼ r 0 ; r ¼ r 1 ) is assumed. Three basic parameters, the flux velocity (u), its temperature (T 0 ), and the coefficient (a) for heat-exchange with environs were varied for the numerical solution of Equation (5)(6)(7)(8)(9)(10).…”

Section: The Two-dimensional Problem and Analysis Of Numerical Resultsmentioning

confidence: 99%

“…[6] We note that, when carrying out the frontal polymerization in tubular reactors of continuous action, there is an elongated flux of liquid monomer forming in the axial part of the reactor because of a velocity gradient along the radius of reactor. [7] The liquid monomer stream, having reached the reactor end, leaves it without taking part in the polymerization reaction. Therefore, in a work by Davtyan et al the frontal polymerization of MMA has been studied in reactors with radially symmetric streams.…”

Section: Introductionmentioning

confidence: 99%

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Frontal Reaction of Epoxy Oligomers in Tubular Flux Reactors

Tonoyan

Davtyan

Müller

2013

Macro Reaction Engineering

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A one‐dimensional and two‐dimensional model of the frontal reaction of epoxy compounds by aromatic amines in tubular flux reactors is investigated. The influence of relevant kinetic factors (velocity, activation energy, and others) on the velocity of the traveling front, the heat regimes of the reactor, and the geometric dimensions of the reactor is studied. An optimal steady‐state condition of the tubular reactor under continuous action is determined. Profiled armored carbon and glass plastics forming laboratory installation are constructed, as derived from the obtained theoretical results. It is shown that the theoretical and practical results are in satisfactory agreement. Several physico‐mechanical properties (e.g., bending strength, longitudinal modulus of elasticity), as based on the reactor wall temperature, angle of armoring, and tension are determined.

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Section: The Two-dimensional Problem and Analysis Of Numerical Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Frontal Reaction of Epoxy Oligomers in Tubular Flux Reactors

Tonoyan

Davtyan

Müller

2013

Macro Reaction Engineering

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“…Goldshtik (1979) found a similar behavior when an incompressible fluid flows through a granular bed in which heat is produced uniformly. Bostandzhiyan et al (1979), Zhirkov et al (1980), and Vaganov and Zhirkov (1 986) found thermoflow multiplicity in a tubular polymerization reactor in which viscosity was strongly dependent on the temperature and degree of polymerization. Matros and Chumakova (1980) showed an example of thermoflow multiplicity in a packed-bed reactor in which the reactant was incompressible.…”

Section: Introductionmentioning

confidence: 98%

Thermoflow multiplicity in a packed‐bed reactor Part I: Adiabatic case

1987

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Steady states with different flow rates and temperature profiles may exist in a packed-bed reactor operating under a prescribed pressure drop, due to the coupling among the species, energy, and momentum balances and the change of the physical properties with temperature and pressure. This thermoflow multiplicity may be found even for reactions whose rate is rather insensitive to temperature changes (low activation energy) and may lead to highly undesirable operation of multitube packed-bed reactors. A hierarchy of models based on different assumptions is used to derive criteria for predicting the conditions under which this thermoflow multiplicity may occur.

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“…Frontal polymerization has also been studied for reactors of different geometries. Tubular reactors were studied experimentally [11,12] and theoretically [8,21,33]. Cylindrical and spherical reactors were considered [3,4,35] for one-step chemical kinetics, and [9,32] for more detailed chemistry.…”

Section: Introductionmentioning

confidence: 99%

Propagation of frontal polymerization—crystallization waves

Volpert

1994

Eur. J. Appl. Math

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We consider polymerization–crystallization waves in a cylindrical reactor, in which monomer is converted to polymer in a planar front. The polymer is subsequently crystallized in a wider zone behind the front. Specifically, we study uniformly propagating polymerization–crystallization waves, and determine profiles of temperature, and concentrations of polymer and crystallized polymer, as well as the propagation velocity. A linear stability analysis of the travelling wave solutions indicates the possibility of Hopf bifurcation, which describes the transition to the experimentally observed spinning mode of propagation, in which a hot spot is observed to propagate along a helical path on the surface of the cylinder. Since conditions at the time of conversion determine the nature of the polymer produced, spiral hollows, which trace out a helical path, appear on the surface of the crystallized polymer product.

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Low-temperature polymerization conditions in a flow-through reactor

Cited by 11 publications

References 4 publications

Frontal Reaction of Epoxy Oligomers in Tubular Flux Reactors

Frontal Reaction of Epoxy Oligomers in Tubular Flux Reactors

Thermoflow multiplicity in a packed‐bed reactor Part I: Adiabatic case

Propagation of frontal polymerization—crystallization waves

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