Zeolite membrane characterization by a novel defect detection technique

KUMAKIRI, PETERS, KLETTE, KITA, TISCORNIA, TÉLLEZ, CORONAS, BREDESEN

Zaragoza, España

Congreso; 4th International Zeolite Membrane Meeting (IZMM); 2007

Membrane defects are formed by various causes, e.g., due to defects in the support, inappropriate preparation, firing or sealing conditions, or during storage, etc. Unselective permeation through defects reduces the membrane selectivity, and may cause poor reproducibility of the membrane quality. Visualising the defect density distribution may help to improve the preparation by reducing the defect concentration. For example, when a tubular membrane is synthesised on a support placed vertically, concentration difference of reagents may occur, due to gravity, and affect the membrane formation. Having information on the distribution of defects will be useful in such cases to link the final membrane quality to parameters in the membrane preparation.e.g., due to defects in the support, inappropriate preparation, firing or sealing conditions, or during storage, etc. Unselective permeation through defects reduces the membrane selectivity, and may cause poor reproducibility of the membrane quality. Visualising the defect density distribution may help to improve the preparation by reducing the defect concentration. For example, when a tubular membrane is synthesised on a support placed vertically, concentration difference of reagents may occur, due to gravity, and affect the membrane formation. Having information on the distribution of defects will be useful in such cases to link the final membrane quality to parameters in the membrane preparation.