Analysis of Performance Degradation of Silica Gels after Extended use Onboard the ISS

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dc.creatorCmarik, Gregory
dc.creatorKnox, James
dc.creatorHuff, Timothy
dc.date.accessioned2018-07-06T14:47:32Z
dc.date.available2018-07-06T14:47:32Z
dc.date.issued2018-07-08
dc.descriptionGregory Cmarik, Jacobs ESSSA, NASA/MSFC/ES62
dc.descriptionJames Knox, NASA/MSFC/ES62
dc.descriptionTimothy Huff, NASA/MSFC/EM22
dc.descriptionICES302: Physio-chemical Life Support- Air Revitalization Systems -Technology and Process Development
dc.descriptionThe 48th International Conference on Environmental Systems was held in Albuquerque, New Mexico, USA on 08 July 2018 through 12 July 2018.
dc.description.abstractThe disassembly of two flight desiccant beds from the Carbon Dioxide Removal Assembly (CDRA) revealed significant discoloration of the silica gel near the bed inlet as well as a coincidental performance loss. This material was analyzed for the presence of chemical contaminants, physical porosity changes, and adsorption performance. The material characteristics are compared against the location in the bed from which they were sampled in order to develop profiles through the bed. Additional testing of the beds prior to disassembly provided more data points. Possible mechanisms for the loss of capacity are provided though no root cause has been confirmed. Extrapolation of the performance loss is used to estimate the required oversizing of the silica gel layer for long-term operation.en_US
dc.format.mimetypeapplication/pdf
dc.identifier.otherICES_2018_2
dc.identifier.urihttp://hdl.handle.net/2346/74023
dc.language.isoeng
dc.publisher48th International Conference on Environmental Systems
dc.subjectCarbon Dioxide Removal Assembly
dc.subjectCDRA
dc.subject4 bed molecular sieve
dc.subject4BMS
dc.subjectsilica gel
dc.subjectdesiccant
dc.subjectcontamination
dc.titleAnalysis of Performance Degradation of Silica Gels after Extended use Onboard the ISSen_US

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