Radiative Gasification Apparatus

Metadata Updated: March 8, 2017

This apparatus, developed at EL, determines gasification rate (mass loss rate) of a horizontally oriented specimen exposed in a nitrogen environment to a controlled radiant heat flux from a cone-shaped heater. These non-flaming conditions allow the condensed-phase gasification processes to be de-coupled from complicating gas-phase processes; permit a better estimate of the actual incident heat flux that is producing the fuel gas; and provide a much better view of surface phenomena (e.g., bubbling, charring) during degradation. The cylindrical chamber is 0.61 m in diameter and 1.70 m in height. Two windows provide optical access. The chamber[HTML_REMOVED]s interior walls are blackened and water cooled to 25 EC to minimize indirect heating of the specimen. The cone-heater temperature is usually fixed at 809 EC to maintain a constant emission spectrum. Changing the distance between the sample and heater can vary incident heat flux to the sample between approximately 25 kW/m 2 and 70 kW/m 2. A water-cooled shutter is extended to protect the sample from the incident heat flux prior to testing: it also can be used to quickly halt the exposure at any time to [HTML_REMOVED]freeze[HTML_REMOVED] the remaining sample for subsequent chemical/physical analysis. Flux levels vary approximately 8-10% across a 0.1 m diameter specimen. Product and ambient gases are removed via an exhaust duct by a constant nitrogen flow of 7.7 l/s at 25 EC. Degradation products can be collected above the specimen[HTML_REMOVED]s surface and condensed in a cold trap for further chemical analysis. Load cell data are taken every 0.5 s with an uncertainty less than 1% over a 100 g range. Specimens instrumented with thermocouples also can be accommodated.Specifications / Capabilities:The gasification apparatus usually is used to study the effects of fire-retardant additives on condensed-phase reactions in synthetic polymers; the data generated provide insight into the chemical and/or physical mechanisms responsible for improved flammability. In addition, the heat of gasification of the specimen, a necessary property for mathematical modeling of the gasification process, can be determined from the data.

Access & Use Information

Public: This dataset is intended for public access and use. License: No license information was provided. If this work was prepared by an officer or employee of the United States government as part of that person's official duties it is considered a U.S. Government Work.

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Dates

Metadata Created Date March 8, 2017
Metadata Updated Date March 8, 2017

Metadata Source

Harvested from Federal Laboratory Consortium Data.json

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Resource Type Dataset
Metadata Created Date March 8, 2017
Metadata Updated Date March 8, 2017
Publisher Federal Laboratory Consortium
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Flcbusinessurl https://flcbusiness.federallabs.org/#/laboratory/5715
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