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Title: Apparatus and method for transient thermal infrared spectrometry of flowable enclosed materials

Abstract

A method and apparatus for enabling analysis of a flowable material enclosed in a transport system having an infrared transparent wall portion. A temperature differential is transiently generated between a thin surface layer portion of the material and a lower or deeper portion of the material sufficient to alter the thermal infrared emission spectrum of the material from the black-body thermal infrared emission spectrum of the material, and the altered thermal infrared emission spectrum is detected through the infrared transparent portion of the transport system while the altered thermal infrared emission spectrum is sufficiently free of self-absorption by the material of emitted infrared radiation. The detection is effected prior to the temperature differential propagating into the lower or deeper portion of the material to an extent such that the altered thermal infrared emission spectrum is no longer sufficiently free of self-absorption by the material of emitted infrared radiation. By such detection, the detected altered thermal infrared emission spectrum is indicative of characteristics relating to molecular composition of the material.

Inventors:
 [1];  [1]
  1. Ames, IA
Issue Date:
Research Org.:
Ames Laboratory (AMES), Ames, IA; Iowa State University, Ames, IA (US)
OSTI Identifier:
868687
Patent Number(s):
5191215
Application Number:
07/749,186
Assignee:
Iowa State University Research Foundation, Inc. (Ames, IA) [*] Notice: portion of term of this patent subsequent to December 2, 2008 has been disclaimed.
DOE Contract Number:  
W-7405-ENG-82
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
apparatus; method; transient; thermal; infrared; spectrometry; flowable; enclosed; materials; enabling; analysis; material; transport; transparent; wall; portion; temperature; differential; transiently; generated; surface; layer; deeper; sufficient; alter; emission; spectrum; black-body; altered; detected; sufficiently; free; self-absorption; emitted; radiation; detection; effected; prior; propagating; extent; indicative; characteristics; relating; molecular; composition; transient thermal; layer portion; sufficiently free; thermal infrared; wall portion; transparent wall; emission spectrum; infrared emission; infrared radiation; surface layer; temperature differential; molecular composition; characteristics relating; emitted infrared; material sufficient; enabling analysis; material enclosed; infrared spectrometry; infrared transparent; enclosed materials; transiently generate; /250/356/

Citation Formats

McClelland, John F, and Jones, Roger W. Apparatus and method for transient thermal infrared spectrometry of flowable enclosed materials. United States: N. p., 1993. Web.
McClelland, John F, & Jones, Roger W. Apparatus and method for transient thermal infrared spectrometry of flowable enclosed materials. United States.
McClelland, John F, and Jones, Roger W. Tue . "Apparatus and method for transient thermal infrared spectrometry of flowable enclosed materials". United States. https://www.osti.gov/servlets/purl/868687.
@article{osti_868687,
title = {Apparatus and method for transient thermal infrared spectrometry of flowable enclosed materials},
author = {McClelland, John F and Jones, Roger W},
abstractNote = {A method and apparatus for enabling analysis of a flowable material enclosed in a transport system having an infrared transparent wall portion. A temperature differential is transiently generated between a thin surface layer portion of the material and a lower or deeper portion of the material sufficient to alter the thermal infrared emission spectrum of the material from the black-body thermal infrared emission spectrum of the material, and the altered thermal infrared emission spectrum is detected through the infrared transparent portion of the transport system while the altered thermal infrared emission spectrum is sufficiently free of self-absorption by the material of emitted infrared radiation. The detection is effected prior to the temperature differential propagating into the lower or deeper portion of the material to an extent such that the altered thermal infrared emission spectrum is no longer sufficiently free of self-absorption by the material of emitted infrared radiation. By such detection, the detected altered thermal infrared emission spectrum is indicative of characteristics relating to molecular composition of the material.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1993},
month = {3}
}

Patent:

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