Oxygen Generator-Presentation

Pressure swing adsorption stage 3 the adsorbent

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Unformatted text preview: d. The first bed is depressurized allowing argon and nitrogen to be purged out of the system and released to the atmosphere. Pressure Swing Adsorption Stage 4 The process starts over. Compressed air is once again fed into the first bed. The second bed is depressurized releasing argon and nitrogen molecules to the atmosphere. Adsorbents for PSA Introduction to Zeolites and Carbon Nanotubes Structures Applications Silica Gel Pretreatment Pretreatment bed to remove water vapor and impurities such as carbon dioxide – Air at 100% humidity is approximately 3% water vapor Water can impair the performance of adsorbents in the PSA adsorption columns. Silica gel beds are necessary to remove water vapor from the air. – A heating coil used to evaporate the water from the silica ge l Kinetic Separation Molecular Sieve Carbon (MSC) adsorbents using PSA technology Ideal for separation of Argon and Oxygen – MSCs in kinetic adsorption can adsorb Oxygen 30 times faster than Argon Creates a problem in design, requiring two PSA systems to collect the adsorbed Oxygen Carbon Nanotubes Sheets of carbon atoms rolled into tubes of varying diameters Nanotubes have extraordinary strength Potential uses in many industrial processes, including adsorption. Carbon Nanotubes Advantages Nanotubes have little interaction with nitrogen at high temperatures due to oxygen’s highe...
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This note was uploaded on 08/31/2011 for the course CHE 4273 taught by Professor Staff during the Spring '10 term at Oklahoma State.

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