Personne
Volker Höller
Publications associées (8)
Acoustic and visual study of bubble formation processes in bubble columns staged with fibrous catalytic layers
Albert Renken, Lioubov Kiwi, Volker Höller
High-speed images of bubbly flow coupled with simultaneous passive acoustic measurements were carried out in a bubble column staged with structured fibrous catalysts. Local observations made with a high-speed camera system allow a detailed understanding of ...
2003Reduction of nitrite-ions in water over Pd-supported on structured fibrous materials
Albert Renken, Lioubov Kiwi, Volker Höller
Catalytic hydrogenation of NO2- in water to N2 over Pd-supported on different woven fibrous materials was studied. Low porosity C fiber, low porosity D-type glass fiber, and composite (glass covered by g-Al2O3) fiber were used. Pd dispersion was compared f ...
2001Structured multiphase reactors based on fibrous catalysts: nitrite hydrogenation as a case study
Albert Renken, Lioubov Kiwi, Volker Höller
A reactor concept designed as a bubble column staged with fibrous catalytic layers is tested on pilot-scale for the redn. of nitrite to N by H. CO2 is used to neutralize the hydroxide ions produced during hydrogenation of nitrite. The effective reaction ra ...
Elsevier2001Bubble columns staged with structured fibrous catalytic layers: Residence time distribution and mass transfer
Albert Renken, Lioubov Kiwi, Volker Höller
A new reactor concept for catalyzed three-phase reactions based on the use of woven fibrous materials for bubble columns is suggested. In comparison to conventional multistage bubble columns, the trays are made from woven fibrous catalytic layers. The hydr ...
2001Fibrous structured catalytic beds for three-phase reaction engineering Hydrodynamics study in staged bubble columns
Albert Renken, Lioubov Kiwi, Volker Höller, Dagmar Wegricht
Woven fibrous materials are proposed as structured catalysts for three-phase catalytic reactors. The design of a catalytic bed arranged as a plate bubble column is discussed. The hydrodynamic parameters, like pressure drop and liq. hold-up were found to de ...
Elsevier2000New concepts for chemical processes. Efficient use of energy and raw materials
A review without refs. on new concepts for chem. processes such as non-stationary process control, microreactors, and structured packings. Glass fiber catalysts with modified and/or coated surfaces are presented with 2 reactor concepts: packed bubble colum ...
2000