Analysis of design sensitivity of flow-reversal reactors: Simulations, approximations and oxidation experiments

Sheintuch, Moshe

doi:10.1016/j.ces.2005.01.014

Cited by 6 publications

(5 citation statements)

References 20 publications

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“…Higher catalyst surface temperature compared to bulk gas temperature may be formed also in a once-trough system due to exothermic reactions. In a once-through system, this temperature maximum is close to the outlet of the catalyst [ 12 ].…”

Section: Resultsmentioning

confidence: 99%

Effect of Process Parameters on Catalytic Incineration of Solvent Emissions

Ojala

Lassi

Perämäki

et al. 2008

Journal of Automated Methods and Management in Chemistry

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Catalytic oxidation is a feasible and affordable technology for solvent emission abatement. However, finding optimal operation conditions is important, since they are strongly dependent on the application area of VOC incineration. This paper presents the results of the laboratory experiments concerning four most central parameters, that is, effects of concentration, gas hourly space velocity (GHSV), temperature, and moisture on the oxidation of n-butyl acetate. Both fresh and industrially aged commercial Pt/Al2O3 catalysts were tested to determine optimal process conditions and the significance order and level of selected parameters. The effects of these parameters were evaluated by computer-aided statistical experimental design. According to the results, GHSV was the most dominant parameter in the oxidation of n-butyl acetate. Decreasing GHSV and increasing temperature increased the conversion of n-butyl acetate. The interaction effect of GHSV and temperature was more significant than the effect of concentration. Both of these affected the reaction by increasing the conversion of n-butyl acetate. Moisture had only a minor decreasing effect on the conversion, but it also decreased slightly the formation of by products. Ageing did not change the significance order of the above-mentioned parameters, however, the effects of individual parameters increased slightly as a function of ageing.

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Section: Resultsmentioning

confidence: 99%

Effect of Process Parameters on Catalytic Incineration of Solvent Emissions

Ojala

Lassi

Perämäki

et al. 2008

Journal of Automated Methods and Management in Chemistry

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“…A regenerative system provides extremely high thermal energy recovery and even low VOC concentrations can be treated in self-sustaining mode without extra fuel. It has been reported in the case of flow reversal reactors that the reversing the flow also improves the oxidation efficiency of the process [195][196][197]. This may be due to a self-cleaning property of the reverse flow reactors where accumulated particulate materials are released when the flow direction changes and also due to the varying reaction zone inside the catalyst bed with varying thermal and flow conditions.…”

Section: Catalytic Incineration and Heat Recoverymentioning

confidence: 97%

Catalysis in VOC Abatement

et al. 2011

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Volatile organic compounds (VOCs) are harmful to environment and human health. Catalytic oxidation has been used in VOC abatement for over 60 years, and it has proven to be an effective technology. A large variety of VOCs set high demands for the treatment, and therefore catalytic oxidation needs still to be developed further. This paper reviews current aspects and future research needs related to VOCs and catalytic VOC treatment concentrating on solvent-based, chlorinated and sulphur-containing VOCs.

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“…The basic task for designers of reactor systems is to select apparatuses and their configuration to provide the highest possible conversion degree of inflowing raw material. There are many elaborations and analyses of tubular reactors with reverse flow (Sheintuch, 2005;Sheintuch & Nekhamkina, 2004;Glöckler, Kolios & Eigenberger, 2003;Jeong & Luss, 2003;Annalad, Scholts, Kuipers, & Swaaij, Part I and Part II, 2002;Khinast, Jeong & Luss, 1999;Řeháček, Kubiček & Marek, 1998;Purwono, Budman, Hudgins, Silveston & Matros, 1994;Gupta & Bhata, 1991). The analysis of the dynamics of reverse flow system used for cascade tank reactors was discussed in (Żukowski & Berezowski, 2000;Kulik & Berezowski, 2008;Berezowski & Kulik, 2009), where a possibility of the ocurrence of chaotic oscillations was proved.…”

Section: Introductionmentioning

confidence: 99%

Bifurcation analysis of the conversion degrees in systems based on the cascade of tank reactors

Berezowski¹

2011

Chemical Engineering Science

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The scope of the paper is the analysis of the posibility of increasing conversion in different types of systems based on continuous stirred tank reactors. A numerical model of the cassade with constant direction of material flow is tested, a model of changes of direction flow and a relaxation model. The analysis is conducted by means of parametric continuation method and numerical simulation, with the designation of fitting diagrams and time series. An essential impact of the relaxation method on the increase of the conversion degree is indicated.

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Analysis of design sensitivity of flow-reversal reactors: Simulations, approximations and oxidation experiments

Cited by 6 publications

References 20 publications

Effect of Process Parameters on Catalytic Incineration of Solvent Emissions

Effect of Process Parameters on Catalytic Incineration of Solvent Emissions

Catalysis in VOC Abatement

Bifurcation analysis of the conversion degrees in systems based on the cascade of tank reactors

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