Heat-Transfer Studies in Packed-Bed Catalytic Reactors of Low Tube/Particle Diameter Ratio

Autor:	‡ and H. Jiménez-Islas, Carlos O. Castillo-Araiza, Felipe López-Isunza
Rok vydání:	2007
Předmět:	Packed bed Work (thermodynamics) Chemistry General Chemical Engineering Reynolds number Thermodynamics General Chemistry Mechanics Industrial and Manufacturing Engineering Boundary layer symbols.namesake Thermal conductivity Heat transfer symbols SPHERES Tube (fluid conveyance)
Zdroj:	Industrial & Engineering Chemistry Research. 46:7426-7435
ISSN:	1520-5045 0888-5885
DOI:	10.1021/ie070097z
Popis:	This work describes a heat-transfer study conducted in two beds of low tube/particle diameter ratio (dt/dp ≈ 3) with almost the same diameter but different lengths, packed with catalyst spheres, operating in quasi-adiabatic and nonadiabatic modes. The operation in the short bed in a quasi-adiabatic mode provided independent sets of experiments to estimate the effective thermal conductivity at various Reynolds numbers. This information was transferred successfully to model the short and long beds operating in a nonadiabatic mode. The modeling compares the classical approach to model heat transfer in a packed bed with no hydrodynamics, against those which include the hydrodynamics and a radial voidage profile, as well as the boundary layer approximation of this model. Modeling results showed that very similar predictions of radial and axial temperature profiles are obtained in all cases, making it difficult to discriminate between both model approaches.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::91ee81c772f5d5e733d7dda1f831dd8d https://doi.org/10.1021/ie070097z Zobrazit plný text záznamu