Medical O2 Production Presentation

Medical O2 Production Presentation - O2n-Site Oxygen...

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1 O O 2 2 n n - - Site Oxygen Production Site Oxygen Production DeJuan Frank Stew Harwood University of Oklahoma May 4, 2006
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2 Outline • Project Goal • Brief Theory • Progression of Project Design • Design Conclusions • Business and Economic Analysis
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3 Problem Statement • Develop a marketable oxygen generator for local onsite production in medical facilities • This system should compete with current distribution prices
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4 Recommendation • Two adsorption system, incorporating both N 2 and Argon pressure swing adsorption, is the recommended system • Onsite cryogenic distillation is not profitable
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5 What We Need • Hospital Need - Oxygen – 3000 liquid gallons per month (relatively small) – 1.24 lb-mol/hr – 99.2% Purity- FDA Standards • Dry • Remove impurities
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6 Process Selection • Criteria – Safety: NFPA 50 and NFPA 99 – Purity: USP Standards – Space of system Cost of Equipment and Operations
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7 Optimization • Criteria for optimization – Needs of hospital i.e. supply and storage – Low maintenance/high convenience – Process location and space availability – Economics • Tools for optimization • Pro/II • Microsoft Excel
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8 Options • Membrane – High purity; still does not achieve needed purity Hollow fiber membrane
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9 Options • Electrolysis – Process cost is expensive; electricity cost alone is more than twice the cost of buying • Gibbs Free Energy G = H-T S • 450 kJ/mol O 2 b $38,000/yr energy costs vs. $19,000
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10 Options • Chemical – Utilization of a chemical reaction; unwanted product waste ) ( 2 ) ( ) ( ) ( 2 2 2 aq HF g O l O H g F + +
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11 Options Liquefaction Can be used to achieve purity of 99.2% Pressure swing adsorption
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12 General Theory • What is cryogenics? – Nitrogen boils at -320 o F – Argon boils at -303 o F – Oxygen boils at -297 o F • Carl von Linde, 1985
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13 General Theory Linde Process • Simplest liquefaction cycle • Compressor, heat exchangers, J-T valve • Valve Operation below inversion T and P LOX Air Feed Nitrogen Exhaust
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15 General Theory Claude Process Modern high volume Cryo-plants Compressor, HX, Expansion Turbine Below inversion T and P spec. not required Hybrid of both the Brayton and Linde Cycle
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17 General Theory Pressure Swing Adsorption • A separation process through which a bed packed with molecular sieve or zeolite adsorbents are used to selectively adsorb a desired substance from a pressurized feed stream
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18 General Theory • Two equal beds operate in alternating modes: 1) adsorption 2) desorption – this allows for continuous operation • While one column is in mode 1 the other will always be in mode 2
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19 Three Options Considered 1. Air Feed into Cryogenic Distillation
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20 Three Options Considered 2. Air Feed into an N 2 Adsorber followed by a Cryogenic Distillation
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21 Three Options Considered 3. Air Feed into an N 2 adsorber followed by Argon removal
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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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Medical O2 Production Presentation - O2n-Site Oxygen...

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