| Evaluation of the Digital Opacity Compliance System in High Mountain Desert Environments |
JUN 2003 |
9 pages |
| Authors:
Michael J. McFarland; Spencer H. Terry; Daniel A. Stone; Steven L. Rasmussen; Michael J. Calidonna; UTAH UNIV SALT LAKE CITY
|
 | The digital opacity compliance system (DOCS) has been proposed as an alternative to the U.S. Environmental Protection Agency Reference Method 9 (Visual Determination of the Opacity of Emissions for Stationary Sources). The DOCS, which employs standard digital photography to estimate the opacity of visible emissions, was evaluated in a high mountain desert environment located in Weber County, Utah. The DOCS recorded an average opacity deviation of 5.28% when applied to ... |
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| Spectroscopic Studies of Hazardous Fuel Interactions with Soils |
DEC 93 |
180 pages |
| Authors:
Terence L. Tipton; Daniel A. Stone; AIR FORCE ENGINEERING AND SERVICES CENTER TYNDALL AFB FL
|
| This report describes the development and application of techniques for the spectroscopic study of hazardous fuel compounds in soils. The objective is to obtain improved models of bulk pollutant transport through soils. Two approaches have been used for this study: one consists of in-situ measurements of electronic and vibrational interactions via ultraviolet-visible spectroscopy and infrared spectroscopy, respectively; the other incorporates analytical separation techniques to extract contaminants from soils and identify ... |
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| Chlorotrifluoroethylene Decay in the Atmosphere: Controlled-Environment Chamber Studies |
MAY 92 |
70 pages |
| Authors:
Daniel A. Stone; James R. Long; AIR FORCE ENGINEERING AND SERVICES CENTER TYNDALL AFB FL ENGINEERING AND SER VICES LAB
|
| This report documents a series of experiments conducted to shed additional light on the role of surface-catalyzed reactions on the potential atmospheric oxidation of CTFE vapor. The experiments were conducted in a controlled-environment chamber consisting of a one-meter diameter stainless steel sphere which is Teflon coated. Vapor-phase CTFE was introduced into the chamber at the 5-10 ppm concentration level. It was exposed to helium, then helium with 20 percent oxygen, ... |
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| Hydrazine Decay in the Atmosphere: Controlled-Environment Chamber Studies and Kinetic Modeling |
FEB 92 |
229 pages |
| Authors:
Daniel A. Stone; James R. Long; ARMY MISSILE COMMAND REDSTONE ARSENAL AL SOFTWARE ENGINEERING DIRECTORATE
|
| This report documents a series of experiments conducted to shed additional light on the role of surface-catalyzed reactions on the atmospheric oxidation of hydrazine vapor. The experiments were conducted in a controlled- environment chamber consisting of a one-meter diameter stainless steel sphere which is Teflon coated. Vapor-phase hydrazine was introduced into the chamber at the 50-100 ppm concentration level. It was combined with four different synthetic atmospheric mixtures (all at ... |
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| A Controlled-Environment Chamber for Atmospheric Chemistry Studies Using FT-IR Spectroscopy |
JUN 90 |
57 pages |
| Authors:
Daniel A. Stone; AIR FORCE ENGINEERING AND SERVICES CENTER TYNDALL AFB FL ENGINEERING AND SER VICES LAB
|
| A one-meter diameter, Teflon coated, stainless steel sph ere has been constructed as a tool for conducting studies of the atmospheric chemistry of toxic chemicals. The temperature can be controlled from 5 to 50 deg C. The chamber can be evacuated to 5 X 10 to the minus 6th power torr. Gas samples can be introduced from an external manifold. Solid samples of various kinds can be placed into the ... |
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| Hydrazine Loss Processes in a Teflon Film Reaction Chamber: Laboratory Results and Kinetic Models |
MAY 88 |
125 pages |
| Authors:
Daniel A. Stone; Floyd L. Wiseman; AIR FORCE ENGINEERING AND SERVICES CENTER TYNDALL AFB FL ENGINEERING AND SER VICES LAB
|
| The research described in this report was undertaken to extend our knowledge of the chemical transformations of hydrazine vapor in the environment. It is known that both gas-phase and surface-catalyzed reactions can occur with this fuel. To determine the eventual fate of hydrazine vapors which escape into the atmosphere through normal operations or during accidental liquid spills, all of these processes must be investigated. Hydrazine is used extensively in small ... |
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| Proceedings of the Conference on the Environmental Chemistry of Hydrazine Fuels (3rd) Held in Panama City Beach, Florida on 15-17 September 1987 |
JAN 88 |
321 pages |
| Authors:
Daniel A. Stone; Floyd L. Wiseman; HAZARDOUS MATERIALS TECHNICAL CENTER ROCKVILLE MD
|
| The third conference on the environmental chemistry of hydrazine fuels consisted of the following five general sessions: gas-phase kinetics and models; soil, surface, and matrix isolation studies; hydrazine disposal studies; detection and monitoring; and toxicology. Researchers in these areas of hydrazine fuels chemistry gave short lectures and afterwards entertained questions. The plenary lecture, entitled '100 Years of Hydrazine Chemistry,' was given by Dr Eckart W. Schmidt. The first session dealt ... |
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| The Autoxidation of Monomethylhydrazine Vapor. |
APR 1979 |
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| Authors:
Daniel A. Stone; AIR FORCE ENGINEERING AND SERVICES CENTER TYNDALL AFB FL ENGINEERING AND SERVICES LAB
|
 | Results of experiments simulating atmospheric autoxidation of monomethylhydrazine vapor are presented. MMH partial pressures ranged from a few ppm to a few Torr and all experiments were run at room temperature. Results show that the main products of MMH autoxidation in air are formaldehyde monomethylhydrazine, methane, methanol, nitrogen and water. The reaction rate appears to be heterogeneously controlled with surface activity and surface to volume ratio being important facotrs. MMH ... |
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