Mixed Media Filters for Aircrew Breathing Systems.
Abstract
A comprehensive experimental effort was undertaken to study the properties of silica gel and charcoal used as a dryer/filter system for oxygen purification. The study included (1) the investigation of simple mixtures of silica gel and charcoal, and (2) the precipitation of charcoal dispersed in solutions of sodium silicate. In each case, sorbent concentrations were varied such that water vapor adsorption, contaminant adsorption, flammability, and regeneration criteria were established. Previously reported performance advantages of coprecipitated charcoal/silica gel materials over simple mixtures could not be substantiated. A procedure was developed, however, for coating granular charcoal with a thin layer of silica gel, which produces an essentially dust free product. Limited testing showed improved performance over conventional charcoal. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 01, 1980
- Accession Number
- ADA116382
Entities
People
- Gerald V. Colombo