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Oxygen Mass Flow Rate Generated for Monitoring Hydrogen Peroxide Stability
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Author and Affiliation:
Ross, H. Richard(Lockheed Martin Space Operations, Bay Saint Louis, MS, United States)
Abstract: Recent interest in propellants with non-toxic reaction products has led to a resurgence of interest in hydrogen peroxide for various propellant applications. Because peroxide is sensitive to contaminants, material interactions, stability and storage issues, monitoring decomposition rates is important. Stennis Space Center (SSC) uses thermocouples to monitor bulk fluid temperature (heat evolution) to determine reaction rates. Unfortunately, large temperature rises are required to offset the heat lost into the surrounding fluid. Also, tank penetration to accomodate a thermocouple can entail modification of a tank or line and act as a source of contamination. The paper evaluates a method for monitoring oxygen evolution as a means to determine peroxide stability. Oxygen generation is not only directly related to peroxide decomposition, but occurs immediately. Measuring peroxide temperature to monitor peroxide stability has significant limitations. The bulk decomposition of 1% / week in a large volume tank can produce in excess of 30 cc / min. This oxygen flow rate corresponds to an equivalent temperature rise of approximately 14 millidegrees C, which is difficult to measure reliably. Thus, if heat transfer were included, there would be no temperature rise. Temperature changes from the surrounding environment and heat lost to the peroxide will also mask potential problems. The use of oxygen flow measurements provides an ultra sensitive technique for monitoring reaction events and will provide an earlier indication of an abnormal decomposition when compared to measuring temperature rise.
Publication Date: Sep 15, 2002
Document ID:
20040008395
(Acquired Jan 29, 2004)
Subject Category: PROPELLANTS AND FUELS
Report/Patent Number: SE-2002-09-00064-SSC
Document Type: Preprint
Meeting Information: 5th International Hydrogen Peroxide Propulsion Conference; 15-19 Sep. 2002; Indianapolis, IN; United States
Contract/Grant/Task Num: NAS13-650
Financial Sponsor: NASA Stennis Space Center; Stennis Space Center, MS, United States
Organization Source: Lockheed Martin Space Operations; Bay Saint Louis, MS, United States
Description: 9p; In English
Distribution Limits: Unclassified; Publicly available; Unlimited
Rights: No Copyright
NASA Terms: HYDROGEN PEROXIDE; MASS FLOW RATE; STABILITY; CHEMICAL EVOLUTION; OXYGEN; CHEMICAL REACTIONS; OXYGEN PRODUCTION; FLOW MEASUREMENT
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