Record Details

Record 1 of 1
Low Temperature Catalyst for NH3 Removal
NTRS Full-Text: Click to View  [PDF Size: 1.6 MB]
Author and Affiliation:
Monje, Oscar(QinetiQ North America, Kennedy Space Center, FL, United States);
Melendez, Orlando(NASA Kennedy Space Center, Cocoa Beach, FL, United States)
Abstract: Air revitalization technologies maintain a safe atmosphere inside spacecraft by the removal of C02, ammonia (NH3), and trace contaminants. NH3 onboard the International Space Station (ISS) is produced by crew metabolism, payloads, or during an accidental release of thermal control refrigerant. Currently, the ISS relies on removing NH3 via humidity condensate and the crew wears hooded respirators during emergencies. A different approach to cabin NH3 removal is to use selective catalytic oxidation (SCO), which builds on thermal catalytic oxidation concepts that could be incorporated into the existing TCCS process equipment architecture on ISS. A low temperature platinum-based catalyst (LTP-Catalyst) developed at KSC was used for converting NH3 to H20 and N2 gas by SCO. The challenge of implementing SCO is to reduce formation of undesirable byproducts like NOx (N20 and NO). Gas mixture analysis was conducted using FTIR spectrometry in the Regenerable VOC Control System (RVCS) Testbed. The RVCS was modified by adding a 66 L semi-sealed chamber, and a custom NH3 generator. The effect of temperature on NH3 removal using the LTP-Catalyst was examined. A suitable temperature was found where NH3 removal did not produce toxic NO, (NO, N02) and N20 formation was reduced.
Publication Date: Jan 01, 2013
Document ID:
20130013658
(Acquired Jun 13, 2013)
Subject Category: MAN/SYSTEM TECHNOLOGY AND LIFE SUPPORT
Report/Patent Number: KSC-2013-086
Document Type: Conference Paper
Meeting Information: 43rd International Conference on Environmental Systems; 14-18 Jul. 2013; Vail, CO; United States
Meeting Sponsor: American Inst. of Aeronautics and Astronautics; Reston, VA, United States
Contract/Grant/Task Num: NNK11EA08C
Financial Sponsor: NASA Kennedy Space Center; Cocoa Beach, FL, United States
Organization Source: NASA Kennedy Space Center; Cocoa Beach, FL, United States
Description: 5p; In English; Original contains black and white illustrations
Distribution Limits: Unclassified; Publicly available; Unlimited
Rights: Copyright; Distribution as joint owner in the copyright
NASA Terms: AIR PURIFICATION; AMMONIA; CATALYSTS; FOURIER TRANSFORMATION; INFRARED SPECTRA; INTERNATIONAL SPACE STATION; LOW TEMPERATURE; NITROGEN; OXIDATION; PLATINUM; SPACECRAFT CABIN ATMOSPHERES; TEMPERATURE EFFECTS; TRACE CONTAMINANTS; WATER
› Back to Top
Facebook icon, External Link to NASA STI page on Facebook Twitter icon, External Link to NASA STI on Twitter YouTube icon, External Link to NASA STI Channel on YouTube RSS icon, External Link to New NASA STI RSS Feed
Find Similar Records
 
NASA Logo, External Link

NASA Official: Gerald Steeman
Sponsored By: NASA Scientific and Technical Information Program
Site Curator: NASA Center for AeroSpace Information (CASI)
Last Modified: June 13, 2013

Privacy Policy & Important Notices Disclaimers, Copyright, Terms of Use Freedom of Information Act USA.gov NASA.gov NASA OCIO Free Adobe PDF Reader Free MS Word Viewer