Polymer product engineering utilising oscillatory baffled reactors

Ni, Xiongwei; Murray, K. R.; Zhang, Yanmin; Bennett, Daniel; Howes, Tony

doi:10.1016/s0032-5910(02)00022-0

Cited by 21 publications

(15 citation statements)

References 18 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Authors highlight the efficiency of pulsation to prevent fouling. At lab scale, batch oscillatory baffled reactors have been used to carry out suspension polymerization [6,34,35]. These reactors are available in a continuous configuration, named continuous oscillatory baffled reactor COBR.…”

Section: Introductionmentioning

confidence: 99%

“…The batch configurations have been extensively described in literature [6,[34][35][36][37][38][39][40][41]. Table 2 lists the different parameters affecting droplet size and the correspondent correlations for oscillatory baffled reactor in batch.…”

Section: Introductionmentioning

confidence: 99%

“…COBR are used to carried out continuous-flow heterogeneous reactions such as heterogeneous catalysis reaction [44], biodiesel production [45] or crystallization [46]. Their use as polymerization reactor is mentioned [35] but never described in literature.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Liquid–liquid dispersion in a continuous oscillatory baffled reactor – Application to suspension polymerization

Lobry

Lasuye²,

Gourdon

et al. 2015

Chemical Engineering Journal

View full text Add to dashboard Cite

OATAO is an open access repository that collects the work of Toulouse researchers and makes it freely available over the web where possible.Liquid-liquid dispersion in a continuous oscillatory baffled reactor -Application to suspension polymerization b s t r a c tReducing energy costs, improving safety, minimizing waste are the current aims of chemical engineering. Process intensification in fine chemistry has been extensively studied but less work refers to heterogeneous reactions involving two liquid phases. This paper focuses on batch to continuous suspension polymerization transposition and especially on the liquid-liquid dispersion step. The main features of suspension polymerization reaction are based on (i) the initial liquid-liquid dispersion requiring a controlled size and narrow distribution and (ii) on the control of the final particle size during the agglomeration step by avoiding fouling which is a bottleneck for continuous flow. For the continuous transposition, liquid-liquid dispersion and reaction studies are carried out in continuous oscillatory baffled reactor (COBR) which is a multipurpose reactor. Its suitability to overcome the bottlenecks is demonstrated through the investigation of the oscillating and flow conditions or the dispersed phase holdup. A controlled droplet size distribution can be achieved. Oscillation is the main parameter responsible for droplet breakage. The suitable conditions to obtain stable dispersion are determined. For one of the first times, COBR is used for suspension polymerization.

show abstract

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Liquid–liquid dispersion in a continuous oscillatory baffled reactor – Application to suspension polymerization

Lobry

Lasuye²,

Gourdon

et al. 2015

Chemical Engineering Journal

View full text Add to dashboard Cite

show abstract

“…Use of flow reactors may affect the nature of the drop size distribution and the molecular weight distribution. Ni et al [110] describe the effect of superimposed oscillations on the main flow through a tube. Baade et al [108] and Taylor and Reichert [109] showed that complete segregation of drops, in the suspension polymerization of vinyl acetate, produced an increase in polymer molecular weight.…”

Section: Dispersion Maintenance and Reactor Choicementioning

confidence: 99%

Free‐Radical Polymerization: Suspension

Brooks¹

2005

Handbook of Polymer Reaction Engineering

View full text Add to dashboard Cite

“…For continuous tubular reactors oscillatory flow mixing is a highly efficient alternative to conventional mixing via high spatial velocities and related turbulence . The oscillatory flow baffled reactors are successful examples of PI which already have several applications realized in process industries . In these reactors, mixing is enhanced by oscillations, leading to significant investment and operating cost savings and better control of the reactions.…”

Section: Introductionmentioning

confidence: 99%

Residence time distribution and Peclet number correlation for continuous oscillatory flow reactors

Slavnić

Živković

Bjelić

et al. 2017

J of Chemical Tech & Biotech

View full text Add to dashboard Cite

BACKGROUND Oscillatory baffled reactors have good prospect for use in batch to continuous transition for many industries. For reliable design and scale up it is essential to mathematically describe mixing and flow pattern of oscillatory flow. The aim of this study is to investigate the effects of operating conditions on residence time distribution (RTD) of liquid phase in a continuous oscillatory baffled reactor (COBR) and to propose a correlation that accurately describes the flow pattern. RESULTS Analysis of results obtained for a wide variety of operating conditions in two geometrically similar reactors show that increase of oscillation frequency and amplitude both decrease axial dispersion, with a more prominent effect of amplitude. Proposed power‐law correlation is in very good agreement with all performed experiments. Peclet numbers predicted by this correlation are in reasonably good agreement with the literature experimental data and is much better than the ones obtained by the commonly used correlation, which contains more fitting parameters. CONCLUSION Results show that relatively high amplitudes, low frequencies and low to moderate secondary non‐oscillatory flow should be used to ensure effective mixing with a low net flow in COBR. Developed correlation offers a simple, yet reliable way to predict the macroscopic flow pattern of liquid in COBR. © 2017 Society of Chemical Industry

show abstract

Polymer product engineering utilising oscillatory baffled reactors

Cited by 21 publications

References 18 publications

Liquid–liquid dispersion in a continuous oscillatory baffled reactor – Application to suspension polymerization

Liquid–liquid dispersion in a continuous oscillatory baffled reactor – Application to suspension polymerization

Free‐Radical Polymerization: Suspension

Residence time distribution and Peclet number correlation for continuous oscillatory flow reactors

Contact Info

Product

Resources

About