Accession Number:

ADA347568

Title:

Portable Electrochemical Oxygen Concentrator for Battlefield Combat Casualty Care.

Descriptive Note:

Final rept. 1 Jul 97-28 Feb 98

Corporate Author:

FRESHAIRE SYSTEMS AND TECHNOLOGY INC CLEVELAND OH

Personal Author(s):

Report Date:

1998-03-01

Pagination or Media Count:

26.0

Abstract:

The primary goal of this overall research and development program is to design and construct a portable electrochemical oxygen concentrator PECOC capable of producing nearly pure 98 oxygen from the ambient atmosphere at room temperature. This novel device relies on the two-electron reduction of oxygen to peroxide at a high area carbon-based, gas-permeable, Teflon-bonded HAC-GPTB cathode, which then migrates through a thin solid polymer electrolyteSPE membrane to a gas-diffusion GD anode, where it is oxidized to yield dioxygen. Two major aspects were emphasized during this first six-month period the identification of highly active, highly specific electrocatalysts for the two-electron reduction of O2 to peroxide and for the oxidation of peroxide to O2 in acid media and the construction of a prototype stack reactor capable of delivering pure oxygen at levels comparable to those required for field medical applications 3 Lmin. Significant progress was made in both of these areas. In particular, a simple surface modifier for platinum was found to promote the quantitative reduction of dioxygen peroxide at small overpotentials in dilute phosphoric acid as evidenced by rotating ring-disk techniques results. Furthermore, a full size PECOC unit built from commercially procured materials was shown to deliver pure dioxygen in several independent trials.

Subject Categories:

  • Medicine and Medical Research
  • Medical Facilities, Equipment and Supplies
  • Life Support Systems

Distribution Statement:

APPROVED FOR PUBLIC RELEASE