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Title: A laboratory-scale burner seeded with potassium for calibration of potassium emission/absorption instruments

Abstract

In magnetohydrodynamic (MHD) power systems, potassium may be used to enhance the electrical conductivity of the high temperature products of combustion. In order to better evaluate the performance of MHD generators, it is desirable to be able to measure the distribution of the electrical conductivity of the gases throughout the channel through which the hot gases are passing. One such system is based on the emission/absorption spectra of potassium as a function of temperature. Diagnostic instruments, based on the emission/absorption characteristics of potassium in a flame or plasma require calibration in known temperature and potassium concentration conditions. A laboratory-scale hydrogen/oxygen burner which is seeded with gaseous potassium has been designed, fabricated, and operated for the purpose of providing a calibration facility for the potassium emission/absorption spectrographic (PE/AS) instrument. A nickel block was machined appropriately to provide separate flows of oxygen, hydrogen, and potassium vapor in a hot nitrogen stream mixed with hydrogen. A potassium evaporator was designed and fabricated to allow hot nitrogen gas to bubble through hot molten potassium to provide a known mass fraction of potassium to the resultant flame. The vapor pressure variation of the potassium with temperature was used to predict the amount of potassium carriedmore » to the flame by assuming that the hot nitrogen stream resulted in a saturated mixture as it bubbled through the heated molten potassium. Operational aspects as well as safety considerations in the operation of this burner are described. 10 refs., 1 fig.« less

Authors:
Publication Date:
Research Org.:
Mississippi State Univ., Mississippi State, MS (USA). Diagnostic Instrumentation and Analysis Lab.
Sponsoring Org.:
DOE/FE
OSTI Identifier:
6190590
Report Number(s):
CONF-9104185-1
ON: DE91007217
DOE Contract Number:  
AC02-80ET15601
Resource Type:
Conference
Resource Relation:
Conference: Combustion fundamentals and application conference, Nashville, TN (USA), 21-24 Apr 1991
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; 30 DIRECT ENERGY CONVERSION; ELECTRIC CONDUCTIVITY; MEASURING METHODS; GASES; MHD GENERATORS; PERFORMANCE; POTASSIUM; ABSORPTION SPECTROSCOPY; EMISSION SPECTROSCOPY; BURNERS; CALIBRATION; DESIGN; FLOW RATE; HYDROGEN; LABORATORY EQUIPMENT; MHD CHANNELS; NICKEL; OXYGEN; PLASMA SEEDING; TEMPERATURE DEPENDENCE; ALKALI METALS; DIRECT ENERGY CONVERTERS; ELECTRICAL PROPERTIES; ELEMENTS; EQUIPMENT; FLUIDS; METALS; NONMETALS; PHYSICAL PROPERTIES; SPECTROSCOPY; TRANSITION ELEMENTS; 400102* - Chemical & Spectral Procedures; 300103 - MHD Generators- Materials, Components, & Auxiliaries

Citation Formats

Bouchillon, C W. A laboratory-scale burner seeded with potassium for calibration of potassium emission/absorption instruments. United States: N. p., 1991. Web.
Bouchillon, C W. A laboratory-scale burner seeded with potassium for calibration of potassium emission/absorption instruments. United States.
Bouchillon, C W. Tue . "A laboratory-scale burner seeded with potassium for calibration of potassium emission/absorption instruments". United States. https://www.osti.gov/servlets/purl/6190590.
@article{osti_6190590,
title = {A laboratory-scale burner seeded with potassium for calibration of potassium emission/absorption instruments},
author = {Bouchillon, C W},
abstractNote = {In magnetohydrodynamic (MHD) power systems, potassium may be used to enhance the electrical conductivity of the high temperature products of combustion. In order to better evaluate the performance of MHD generators, it is desirable to be able to measure the distribution of the electrical conductivity of the gases throughout the channel through which the hot gases are passing. One such system is based on the emission/absorption spectra of potassium as a function of temperature. Diagnostic instruments, based on the emission/absorption characteristics of potassium in a flame or plasma require calibration in known temperature and potassium concentration conditions. A laboratory-scale hydrogen/oxygen burner which is seeded with gaseous potassium has been designed, fabricated, and operated for the purpose of providing a calibration facility for the potassium emission/absorption spectrographic (PE/AS) instrument. A nickel block was machined appropriately to provide separate flows of oxygen, hydrogen, and potassium vapor in a hot nitrogen stream mixed with hydrogen. A potassium evaporator was designed and fabricated to allow hot nitrogen gas to bubble through hot molten potassium to provide a known mass fraction of potassium to the resultant flame. The vapor pressure variation of the potassium with temperature was used to predict the amount of potassium carried to the flame by assuming that the hot nitrogen stream resulted in a saturated mixture as it bubbled through the heated molten potassium. Operational aspects as well as safety considerations in the operation of this burner are described. 10 refs., 1 fig.},
doi = {},
url = {https://www.osti.gov/biblio/6190590}, journal = {},
number = ,
volume = ,
place = {United States},
year = {1991},
month = {1}
}

Conference:
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