Accession Number:

ADA607441

Title:

Photocatalytic Destruction of Nitrate Esters in Air

Descriptive Note:

Cost and performance rept.

Corporate Author:

UNIVERSITY OF CENTRAL FLORIDA COCOA FLORIDA SOLAR ENERGY CENTER

Report Date:

2000-07-01

Pagination or Media Count:

45.0

Abstract:

Extruded double-base EDB propellant rocket motors are used to propel conventional munitions from a variety of tri-service platforms. Nitroglycerin NG emissions are generated during propellant annealing operations from the EDB rocket-motor manufacturing plant at the Naval Surface Warfare Center, Indian Head Division IHD. Conventional technologies have been deemed unacceptable for controlling NG emissions due to the inherent hazards associated with the explosive-laden vapors. The objective of this Environmental Security Technology Certification Program ESTCP demonstration was to show that air-phase photocatalytic oxidation is a viable treatment technology for the destruction of NG air emissions. Photocatalytic oxidation is a low-temperature, destructive process that uses ultraviolet UV light and a titanium dioxide TiO semiconductor photocatalyst to 2 generate highly reactive species for destruction of organic molecules. In the case of NG, the reaction products are H2O, CO2, and NOx. A full-scale 650-scfm photocatalytic pollution control unit PPCU was designed and built by the University of Central Floridas Florida Solar Energy Center FSEC for demonstration under this ESTCP project. The PPCU consisted of two modules, each containing 32 low-pressure mercury lamps LPMLs, connected in parallel. The PPCU was designed to remove 10 ppmv of NG in air at a destruction removal efficiency DRE of 99.5. The PPCU was installed at the IHDs annealing oven and tested using a combination of simulated and actual production operations. The demonstration consisted of 200 hours of testing and three trials totaling 250 hours of operation between July and October 1998. Photocatalytic oxidation worked but the performance objectives were not met. At the design flow rat e of 650 scfm, the PPCU was unable to remove 10 ppmv NG from an air stream that also contained lesser amounts of inert plasticizers.

Subject Categories:

  • Organic Chemistry
  • Physical Chemistry
  • Air Pollution and Control

Distribution Statement:

APPROVED FOR PUBLIC RELEASE