Die Bedeutung der Strömungsverteilung für die Modellierung von chemischen Festbettreaktoren bei höheren Reynolds‐Zahlen und ausgedehnten Reaktionszonen

The Measurement of Void Fraction Profiles in Packed Beds

“…Carbonell [2] also used a two zone model for his analysis of the dispersion phenomena. In more recent work Vortmeyer et al [5,6] tried to use the complete radial void fraction profile, and so did Chang [3]. They followed the same itinerary outlined by Lerou and Froment [1] and Marivoet et al [21].…”

“…Carbonell [2] and Chang [3] used the structure of the bed to explain dispersion phenomena. Vortmeyer et al introduced the structural characteristics of the bed to improve their models for creeping flow in reactors [4] and for the theoretical prediction of fixed bed chemical reactor performance [5,6]. Cohen and Metzner [1] accounted for nonuniformities of the bed in the pressure drop relationship for both linear and non-Newtonian fluids.…”

Calibration and uncertainty analysis of a fixed-bed adsorption model for CO2 separation

“…In small-diameter beds, packing heterogeneities near the wall lead to faster flow around the periphery of the bed. The effects of this bypass flow (also referred to as near-wall channeling) are mitigated by increasing radial dispersion 37 and pellet-to-bed diameter ratio 38 . Two approaches can be used when near-wall channeling effects play a significant role in the hydrodynamics.…”