摘要:
The present invention relates to a method for curing a defect in the fabrication of a composite gas separation module and to composite gas separation modules formed by a process that includes the method. The present invention also relates to a method for selectively separating hydrogen gas from a hydrogen gas containing gaseous stream. The method for curing a defect in the fabrication of a composite gas separation module includes depositing a first material comprising palladium over a porous substrate, thereby forming a coated substrate, wherein the coated substrate contains at least one defect. Then, the coated substrate can be selectively surface activated proximate to the defect, thereby forming at least one selectively surface activated region of the coated substrate. A second material can be then preferentially deposited on the selectively surface activated region of the coated substrate, whereby the defect is cured.
摘要:
Processes for fabricating ceramic membranes include providing a porous substrate having at least one inner channel extending therethrough and having surfaces defined by porous walls, depositing a coating slurry on surfaces of the inner channel(s), and sintering. Sintering temperatures for the processes range from about 400 °C to 800 °C. Coating slurries for use in the processes include a boehmite sol and a colloidal suspension of porous alumina particles.
摘要:
Bei einem Verfahren für die Abdichtung eines Membranmoduls wird eine Dichtung (4, 25) zwischen einer ein Rohrbündel (2) haltenden Kopfplatte (3) und einem die Kopfplatte (3) haltenden Montagering (10) eingebracht.
摘要:
The invention relates to a method for sealing a membrane module. In said method, a seal (4) or sealing mass is introduced between a head plate (3) that holds a tube bundle (2) and an assembly ring (10) that holds the head plate (3). Alternatively, a sealing mass containing silica sand for sealing cracks in the head plate is disclosed.
摘要:
A membrane module has, or can be fitted with, a transparent or translucent cover over a block of potting material holding hollow fiber membranes. To locate a defective fiber, a liquid is placed over the ends of the membranes while the separating surfaces of the membranes are exposed to a gas and a pressure differential is applied to produce bubbles of the gas in the liquid through a defect requiring repair. The location of the defective fiber is revealed by the bubbles. The module is repaired by closing the end of the defective fiber. The pressure differential may be applied by suction on the cover such that the separating surfaces of the membranes do not need to be installed in a pressure vessel. The end of the defective membrane may be sealed by manipulating devices from outside of the cover such that the cover does not need to be removed. The cover can also be used to create a permeate cavity, or other part of a header assembly, used in normal operation of the module.
摘要:
The invention relates to repairing and/or modifying a surface of a membrane in osmotically driven membrane systems by the introduction of one or more substances to the membrane.
摘要:
A method for repairing a membrane filtration module in fluid communication with a plurality of additional membrane filtration modules includes fluidly connecting a fluid transfer assembly to the membrane filtration module, fluidly isolating the membrane filtration module from the plurality of additional membrane filtration modules, forcing liquid within the membrane filtration module into the fluid transfer assembly by introducing a pressurized gas into the membrane filtration module, releasing the pressurized gas from the membrane filtration module, fluidly disconnecting the fluid transfer assembly from the membrane filtration module, repairing one or more damaged membranes in the membrane filtration module, and fluidly reconnecting the membrane filtration module to the plurality of additional membrane filtration modules.