Reference : Interfacial area measurement in a catalytic distillation packing using high energy x-...
Scientific journals : Article
Engineering, computing & technology : Chemical engineering
http://hdl.handle.net/2268/31921
Interfacial area measurement in a catalytic distillation packing using high energy x-ray CT
English
Aferka, Saïd [Université de Liège - ULg > Département de chimie appliquée > Génie chimique - Opérations physiques unitaires >]
Marchot, Pierre mailto [Université de Liège - ULg > Département de chimie appliquée > Génie chimique - Systèmes polyphasiques >]
Crine, Michel mailto [Université de Liège - ULg > Département de chimie appliquée > Génie chimique - Opérations physiques unitaires >]
Toye, Dominique mailto [Université de Liège - ULg > Département de chimie appliquée > Génie de la réaction et des réacteurs chimiques >]
2010
Chemical Engineering Science
Pergamon Press - An Imprint of Elsevier Science
65
1
20th International Symposium in Chemical Reaction Engineering—Green Chemical Reaction Engineering for a Sustainable Future
511-516
Yes (verified by ORBi)
International
0009-2509
Oxford
United Kingdom
[en] Katapak™ SP12 ; Structured packing ; Multiphase flow hydrodynamics ; Mass transfer ; X-ray tomography ; Visualization
[en] In this paper, we report on the use of X-ray tomography to visualize and quantify the gas–liquid interfacial area in modular catalytic distillation packing elements.

The calculation method is based on processing of tomographic images. It is validated by comparing specific surface area determined on dry packings (Mellapak™ 752Y and Katapak™ SP12) tomographic binary images (gas and solid) to values announced by manufacturers, based on geometrical considerations. These data agree fairly well. However, tomographic images show that the specific area is not distributed uniformly over the height of a packing element due to the presence of perforations in corrugated sheets and of wall wipers between the packing and the column wall. X-ray tomography is a unique technique to access to the spatial distribution of these geometrical details in a non-intrusive way.

The method used to determine the specific surface area of dry packing is then applied to irrigated packing in order to determine the gas–liquid interfacial area. The axial distribution of the interfacial area is non-uniform and is correlated to the packing specific area. The maxima of the specific surface area correspond to the presence of wall wipers.

The gas–liquid interfacial area averaged over the column length is determined. It increases logically with the liquid superficial velocity and slightly with the gas velocity. The effect of the gas velocity is however more pronounced when reaching loading point.
Communauté française de Belgique - CfB
Researchers ; Students
http://hdl.handle.net/2268/31921
10.1016/j.ces.2009.05.048

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