Investigation and Design of a Regenerable Silver Oxide System for Carbon Dioxide Control

Item

Title
Investigation and Design of a Regenerable Silver Oxide System for Carbon Dioxide Control
Date
1964
Index Abstract
Not Available
Photo Quality
Not Needed
Report Number
AMRL TR 64-119
Creator
Culbertson, W. J.
Corporate Author
Denver Research Institute
Laboratory
Biomedical Laboratory
Extent
112
Identifier
AD0612021
Access Rights
CFSTI
Distribution Classification
1
Contract
AF 33(657)-10928
DoD Project
6373
DoD Task
637302
DTIC Record Exists
Yes
Distribution Change Authority Correspondence
None
Distribution Conflict
No
Abstract
Precipitated silver carbonate was investigated using test tube samples to establish the merits of this approach to an Ag2O solids system for CO2 removal. Moisture catalyzes transport of CO2 or Ag(+) through an Ag2CO3 layer protecting the Ag2O from conversion to Ag2CO3. Regeneration to Ag2O may be accomplished in moist partial vacuum at 125C within 2 hours. H2O must reach the decomposing Ag2CO3 by penetrating a protective Ag2O layer counterflow to the outflowing CO2. Moisture is not necessary with Y(+++) catalyst at 150C. absorption is speeded 2-3 fold with Y(+++) catalyst. At 1/2% CO2 and 50% humidity 75% yield is attained within 16 hours. Y(+++) dissolved in the cation lattice is believed to induce Ag(+) vacancies in Ag2CO3 and increase Ag(+) transport through the Ag2CO3 layer. H2O may catalyze by supplying OH(-) which dissolves in the anion lattice inducing Ag(+) vacancies. Preliminary work on several other metal oxides showed Zn and Pb to be most promising of these as a substitute for the short-lived Ag2O.
Report Availability
Full text available
Date Issued
1964-12
Provenance
RAF Centre of Aviation Medicine
Type
report
Format
1 online resource
Media
AMRLTR64-119.pdf