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Oxygen

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Oxygen

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  1. Oxygen Aminata Kamara

  2. About oxygen • Also known as O2 • Colorless, odorless and tasteless • comprises 21 percent of the earth's atmosphere • comprises 85 percent of its oceans • 60 percent of the human body • supports life and makes combustion possible

  3. Production • the second-largest volume industrial gas, is produced commercially as a gas or as a liquid by several methods. • Cryogenic Air separation • a process that compresses and cools atmospheric air, then, - relying on different boiling points - separates the resulting liquid into its components in a distillation column • Vacuum Pressure Swing Adsorption (VPSA), • a non-cryogenic technology that produces oxygen from air by using an adsorbent in a pressure swing process to remove nitrogen

  4. Cryogenic Air Separation Method • Cryogenic technique is a traditional method • Cryogenic gases are liquefied gases at standard temperature and pressure. • requires large sized plants for its processing • Steps to the process • The first step in any cryogenic air separation plantis filtering and compressing air. • The second step is removing the remaining carbon dioxide and water vapor • The third step in the cryogenic air separation is the transfer of additional heat against product and waste gas so as to bring the air feed to cryogenic temperature.

  5. Non-Cryogenic Air Separation Method • non-cryogenic air separation-new technology – developed in 1970 • considered to be a convenient, efficient, and economical method • requires air to force through special materials that selectively pass or retain the oxygen

  6. Universal Industrial Gases, Inc. • Designer, manufacturer, supplier, and installer

  7. VPSA • VPSA system includes a rotary-lobe feed air blower, vacuum blower (two bed systems only), one or two adsorbent vessels, an oxygen surge tank, switching valves and computer controls. • HOW IT WORKS • single-bed system • the blower draws in air, compresses it and sends it to the adsorbent vessel to remove impurities, leaving 90 to 94 percent pure oxygen as the product. • two-bed system • adsorption process cycle that relies on swings in pressure -- from above one atmosphere to below atmospheric pressure (vacuum) -- to cycle each bed sequentially from adsorption to desorption.

  8. Applications • Steel Manufacturing • Chemical Processing • Glass Manufacturing • Health Services • Pulp and Paper • Metal Fabrication