Mathematical analysis of crossflow magnetically stabilized fluidized-bed chromatography

Pirkle, J. Carl; Siegell, J. H.

doi:10.1021/ie00077a018

Cited by 2 publications

(11 citation statements)

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“…A rigorous test (Siegell et al, 1986a) on continuous separation reveals that the elution positions for components in the mixtures are nearly the same as for the injection of an individual component (see Fig.3.12c). For a single species one gets (Siegel et al, 1985a;Pirkle and Siegell, 1988 Cheremisinoff etal.(1985). This Chromatographie device operates with axial field and consequently at higher gas flow rates, higher bed expansions, higher degree of channeling, higher axial dispersion that finally yields higher HETP and decreasing mass transfer efficiency.…”

Section: Magnetically Assisted Bed Chromatography Basic Idea and Expementioning

confidence: 99%

“…Diffusion across the external stagnant film is equated to diffusion into the particle interior, namely (Siegel et al, 1985a;Pirkle and Siegell, 1988) Q lp (r,x,y) = finite values at r = 0 (3.18a,b) Diffusion across the external stagnant film is equated to diffusion into the particle interior, namely (Siegel et al, 1985a;Pirkle and Siegell, 1988) Q lp (r,x,y) = finite values at r = 0 (3.18a,b)…”

Section: • Modelling Of Crossflow Msbmentioning

confidence: 99%

“…The diffusion across the external film is equated to diffusion into the particle interior The rate at which a species is adsorbed on the intraparticle surface as the particle moves horizontally is given by the solid-phase mass balance equation (Siegel et al 1985a;Pirkle and Siegell, 1988) The diffusion across the external film is equated to diffusion into the particle interior The rate at which a species is adsorbed on the intraparticle surface as the particle moves horizontally is given by the solid-phase mass balance equation (Siegel et al 1985a;Pirkle and Siegell, 1988) …”

Section: • Modelling Of Crossflow Msbmentioning

confidence: 99%

“…The model was solved (Pirkle and Siegell, 1988) 25, Nos. The model was solved (Pirkle and Siegell, 1988) 25, Nos.…”

Section: • Modelling Of Crossflow Msbmentioning

confidence: 99%

“…The model was solved (Pirkle and Siegell, 1988) 25, Nos. In 3.2 1 γ is parameter depending on process variable -see details in (Pirkle and Siegell, 1988). In 3.2 1 γ is parameter depending on process variable -see details in (Pirkle and Siegell, 1988).…”

Section: • Modelling Of Crossflow Msbmentioning

confidence: 99%

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Magnetic Field Assisted Fluidization - A Unified Approach Part 7. Mass Transfer: Chemical reactors, basic studies and practical implementations thereof

Hristov¹

2009

Reviews in Chemical Engineering

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Transfer Studies 5.1. Bubble Columns with chemically inert coarse particles 5.2. Slurry Bubble Columns (SBC) 5.2.7. Slurry Bubble Columns with chemically inert flne particles 5.2.2. Slurry Bubble Columns with fine suspended catalyst particles: laboratory studies 5.2.3. Slurry Bubble Columns with fine suspended catalyst particles: process oriented examples 5.4. Trickle beds (Counter-current flow) 5.4.1. General comments 5.4.2. Flue gas desulphurization -Approach ofGui et al. 5.4.3. Flue gas desulphurization by enhanced iron corrosion in a magnetic field 5.4.4. L-S mass transfer with SRNA-4 catalyst in magnetically assisted trickle bed 5.4.5. Comments and suggestion about the mass transfer dimensionless correlations. 5.4.6. Final comments on magnetically assisted trickle beds 5.5. Magnetically assisted airlifts -mass transfer issues 6. INDUSTRIAL IMPLEMENTATIONS -Trials and errors 6.1. Preamble 6.2. Early attempts: Bulgarian pilot-plant experiments 6.2.7. Results 6.2.2. Principle drawbacks 6.3 The EXXON Era 6.4. The Chinese Wave 6.5. Critical Overview and Lessons 7. CLOSING COMMENTS ACKNOWLEDGMENTS LIST OF SYMBOLS REFERENCES SUMMARY Part 7 of the series Magnetic Field Assisted Fluidization (MFAF)-A Unified Approach is devoted to chemical reactor design utilizing Brought to you by | University of Birmingham Authenticated Download Date | 6/13/15 5:09 PM Jordan HristovReviews in Chemical Engineering magnetically assisted fluidized beds. Basic reactor principles wellimplemented in the chemical engineering science are used to analyze the existing situation of those special types of mass transfer devices. The hydrodynamics of all systems reviewed in the previous parts of the series (G-S, L-S and G-L-S) serves as a foundation assuring proper understanding of their mass transfer performances. Thorough analysis of MFAF mass transfer studies in both laboratory and pilot scales is performed. Special attention is paid to the attempts to do industrial implementations of MFAF based chemical reactors: trial-error steps, pitfalls and recent achievements. Part 7 refers only to reactor designs and chemical reaction performances whilst magnetically assisted bioreactors are at issue in a separate part of the review series. All these issues make Part 7 a comprehensive review thoroughly investigating one undeveloped, but with a great potential and directly applicable to practice, branch of magnetic field assisted fluidization. PREFACEDear readers, Part 7 of the series Magnetic Field Assisted Fluidization (MFAF) finally arrived to the point where contacting devices based on this fluidization technique and their mass transfer performances have to be analyzed. As it was mentioned continuously in the previous reviews, the hydrodynamics and the proper knowledge of the regimes enable to understand and control the mass and heat transfer operations in a correct way. Now, with knowledge accumulated systematically in the preceding 6 issues, we approach mass transfer operations performed by various groups of investigators over 45 years and provoke...

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Section: Magnetically Assisted Bed Chromatography Basic Idea and Expementioning

confidence: 99%

Section: • Modelling Of Crossflow Msbmentioning

confidence: 99%