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.

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

Metadata Source

Harvested from Federal Laboratory Consortium Data.json

Additional Metadata

Resource Type Dataset
Metadata Created Date March 8, 2017
Metadata Updated Date March 8, 2017
Publisher Federal Laboratory Consortium
Unique Identifier 8B1F94C6-529A-4A81-91A7-7C42E35C1A9E
Maintainer Email
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Flcbusinessurl https://flcbusiness.federallabs.org/#/laboratory/5715
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Source Datajson Identifier True
Source Hash 812dfba6aef72724bd8ca3908f3b5510f74d0f1c
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