Modifications of the adsorption-catalytic system for organic impurities removal

Zazhigalov, S.V.; Микенин, П. Е.; Pisarev, D. A.; Baranov, D. V.; Лопатин, С. А.; Чумакова, Н. А.; Zagoruiko, Andrey N.

doi:10.1016/j.cep.2017.04.011

Cited by 7 publications

(4 citation statements)

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“…The positive effect of bed sectioning was earlier studied in our preceding works, − which were based on a one-dimensional adiabatic model of catalyst bed. In fact, the possible nonadiabatic behavior of the real three-dimensional (3D) beds may produce significant differences in simulation results.…”

Section: Introductionmentioning

confidence: 91%

“…As in previous works, − the application of the commercial copper–chromia–alumina deep oxidation catalyst ICT-12–8 (manufactured by Katalizator Co., Novosibirsk, Russia) was considered, so the “alumina” was chosen as the basic solid phase material in COMSOL for the definition of the physical and thermophysical properties of the catalyst.…”

Section: Model Descriptionmentioning

confidence: 99%

“…One of the possibilities to reduce the energy consumption of the process is the location of the regeneration initiator directly inside the input part of the catalytic bed. According to theoretical estimates, this modification makes it possible to reduce the specific energy consumption by 2–3 orders of magnitude. − …”

Section: Introductionmentioning

confidence: 99%

“…The reduction of peak concentrations and temperatures in the outlet streams can be achieved through the use of a sectional system. − The mixture to be cleaned is fed into all parallel sections concurrently, and regeneration is carried out in turn. Thus, the flow at the outlet of the regenerated section is diluted with the flows, leaving the remaining sections operating in the adsorption mode.…”

Section: Introductionmentioning

confidence: 99%

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Mathematical Modeling of the Adsorption-Catalytic Process with Internal Heater in a Multisectional Arrangement

Zazhigalov,

Elyshev,

Zagoruiko

2023

Ind. Eng. Chem. Res.

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In this work, a multisectional reactor for the adsorption-catalytic process for the neutralization of emissions from volatile organic compounds (VOCs) was studied by the method of computational fluid dynamics (CFD) modeling using the COMSOL Multiphysics commercial software. The nonstationary model in a three-dimensional (3D) geometry considered the change in the velocity field, pressure, and mass balance, including in the pores of the catalyst pellets and the reactions on their inner surface, as well as the heat balance, taking into account the ongoing reactions. Cases with 1, 2, and 5 sections were considered; it was shown that system sectioning allows not only to reduce the peak temperature of the exhaust gases and the peak concentration of VOCs in them at the regeneration stage but also to increase the average VOC abatement degree. The phenomenon of a self-sustained decrease of the gas flow rate in the section undergoing autothermal adsorbent−catalyst regeneration, improving process efficiency, was studied. Various materials of internal walls were also considered; it was found that the use of materials with the minimum possible thermal conductivity is preferable.

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Section: Introductionmentioning

confidence: 91%