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Originally spelled VisQueen, the film was an excellent moisture barrier and was marketed to many industrial, architectural, and consumer applications, such as moisture barriers, plant seedbed protection films, building fumigation barriers, drop cloths, case liners, and tarpaulins.
Gas separation across a membrane is a pressure-driven process, where the driving force is the difference in pressure between inlet of raw material and outlet of product. The membrane used in the process is a generally non-porous layer, so there will not be a severe leakage of gas through the membrane.
The membrane is tested immediately after installation and prior to being covered up by any following construction processes. The area below the membrane is temporarily pressurized with a mixture of clean air and a non-toxic and inert tracer gas that is sensitive to detection. Special equipment is then used to trace all leaks within the ...
Dense membranes are utilized for gas separations (removal of CO 2 from natural gas, separating N 2 from air, organic vapor removal from air or a nitrogen stream) and sometimes in membrane distillation. The later process helps in the separation of azeotropic compositions reducing the costs of distillation processes.
Vacuum swing adsorption is a similar process; the product gas is evolved from the zeolite at sub-atmospheric pressure. Membrane nitrogen generator. Membrane technologies can provide alternate, lower-energy approaches to air separation. For example, a number of approaches are being explored for oxygen generation.
Packed bed and fluidized bed membrane reactors. Generally, membrane reactors can be classified based on the membrane position and reactor configuration. [1] Usually there is a catalyst inside: if the catalyst is installed inside the membrane, the reactor is called catalytic membrane reactor (CMR); [1] if the catalyst (and the support) are packed and fixed inside, the reactor is called packed ...
Membrane roofing is a type of roofing system for buildings, RV's, Ponds and in some cases tanks. It is used to create a watertight covering to protect the interior of a building. Membrane roofs are most commonly made from synthetic rubber, thermoplastic (PVC or similar material), or modified bitumen. Membrane roofs are most commonly used in ...
Gaztransport & Technigaz SA is a French multinational naval engineering company with headquarters in Saint-Rémy-lès-Chevreuse, France.. Trading as the GTT Group, the company is an engineering organization specializing in membrane containment systems dedicated to the transport and storage of liquefied gas worldwide.