6533b86ffe1ef96bd12cd066
RESEARCH PRODUCT
Evaluation and comparison of the pore structure and related properties of particulate and monolithic silicas for liquid phase separation processes
Dieter LubdaB. BidlingmaierC. Du Fresne Von HohenescheK.k. Ungersubject
Permeability (earth sciences)Materials sciencechemistryMacroporeChemical engineeringAnalytical chemistrychemistry.chemical_elementSorptionTheoretical plateMesoporous materialPorosityNitrogenHigh-performance liquid chromatographydescription
Two types of silicas, highly porous beads of 10 μm average particle diameter and particle porosity between 48 to 86 % and monolithic silicas with constant mesopore diameter of 12 nm, constant total porosity of 80 % at variable macropore diameter between 2 and 6 μm were subjected to pore structural characterisation and tests in high performance liquid chromatography (HPLC). The column permeability KF of the columns packed with highly porous beads was twice as much as for the monolithic silica columns. The differences in theoretical plate height - linear velocity curves could be explained on the basis of the pore connectivity values nT of the materials which were computed from the nitrogen sorption isotherms using the pore network model of Meyers and Liapis.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2002-01-01 |