Method and apparatus for detecting halogenated hydrocarbons

Monagle, Matthew; Coogan, John J

Title: Method and apparatus for detecting halogenated hydrocarbons

Abstract

A halogenated hydrocarbon (HHC) detector is formed from a silent discharge (also called a dielectric barrier discharge) plasma generator. A silent discharge plasma device receives a gas sample that may contain one or more HHCs and produces free radicals and excited electrons for oxidizing the HHCs in the gas sample to produce water, carbon dioxide, and an acid including halogens in the HHCs. A detector is used to sensitively detect the presence of the acid. A conductivity cell detector combines the oxidation products with a solvent where dissociation of the acid increases the conductivity of the solvent. The conductivity cell output signal is then functionally related to the presence of HHCs in the gas sample. Other detectors include electrochemical cells, infrared spectrometers, and negative ion mobility spectrometers.

Inventors:

Monagle, Matthew ^[1]; Coogan, John J ^[1]

Los Alamos, NM

Issue Date:: 1997-01-01

Research Org.:: Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)

OSTI Identifier:: 871139

Patent Number(s):: 5665604

Assignee:: Regents of University of California, Office of Technology (Alameda, CA)

Patent Classifications (CPCs):: G - PHYSICS G01 - MEASURING G01N - INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES

Y - NEW / CROSS SECTIONAL TECHNOLOGIES Y10 - TECHNICAL SUBJECTS COVERED BY FORMER USPC Y10T - TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

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G - PHYSICS G01 - MEASURING G01N - INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
G01N21/73 - using plasma burners or torches

Y - NEW / CROSS SECTIONAL TECHNOLOGIES Y10 - TECHNICAL SUBJECTS COVERED BY FORMER USPC Y10T - TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
Y10T436/15 - Inorganic acid or base [e.g. , hcl, sulfuric acid, etc. ]
Y10T436/153333 - Halogen containing
Y10T436/19 - Halogen containing
Y10T436/204998 - Inorganic carbon compounds
Y10T436/21 - Hydrocarbon
Y10T436/214 - Acyclic [e.g., methane, octane, isoparaffin, etc.]
Y10T436/218 - Total hydrocarbon, flammability, combustibility [e.g., air-fuel mixture, etc.]

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DOE Contract Number:: W-7405-ENG-36

Resource Type:: Patent

Country of Publication:: United States

Language:: English

Subject:: method; apparatus; detecting; halogenated; hydrocarbons; hydrocarbon; hhc; detector; formed; silent; discharge; called; dielectric; barrier; plasma; generator; device; receives; gas; sample; contain; hhcs; produces; free; radicals; excited; electrons; oxidizing; produce; water; carbon; dioxide; acid; including; halogens; sensitively; detect; presence; conductivity; cell; combines; oxidation; products; solvent; dissociation; increases; output; signal; functionally; related; detectors; electrochemical; cells; infrared; spectrometers; negative; mobility; oxidation products; free radical; dielectric barrier; mobility spectrometer; plasma generator; gas sample; halogenated hydrocarbons; functionally related; electrochemical cells; carbon dioxide; electrochemical cell; output signal; discharge plasma; free radicals; halogenated hydrocarbon; plasma device; barrier discharge; oxidation product; silent discharge; cell output; infrared spectrometer; /436/422/

Citation Formats


                    Monagle, Matthew, and Coogan, John J. Method and apparatus for detecting halogenated hydrocarbons.  United States: N. p., 1997. 
        Web.

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                    Monagle, Matthew, & Coogan, John J. Method and apparatus for detecting halogenated hydrocarbons.  United States.

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                    Monagle, Matthew, and Coogan, John J. Wed .  
        "Method and apparatus for detecting halogenated hydrocarbons".  United States.  https://www.osti.gov/servlets/purl/871139.

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@article{osti_871139,

  title        = {Method and apparatus for detecting halogenated hydrocarbons},

  author       = {Monagle, Matthew and Coogan, John J},

  abstractNote = {A halogenated hydrocarbon (HHC) detector is formed from a silent discharge (also called a dielectric barrier discharge) plasma generator. A silent discharge plasma device receives a gas sample that may contain one or more HHCs and produces free radicals and excited electrons for oxidizing the HHCs in the gas sample to produce water, carbon dioxide, and an acid including halogens in the HHCs. A detector is used to sensitively detect the presence of the acid. A conductivity cell detector combines the oxidation products with a solvent where dissociation of the acid increases the conductivity of the solvent. The conductivity cell output signal is then functionally related to the presence of HHCs in the gas sample. Other detectors include electrochemical cells, infrared spectrometers, and negative ion mobility spectrometers.},

  doi          = {},

  journal      = {},
number       = ,

  volume       = ,

  place        = {United States},

  year         = {1997},

  month        = {1}

}

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Works referenced in this record:

Negative ion mobility spectrometry for selected inorganic pollutant gases and gas mixtures in air
journal, January 1986

Eiceman, G. A.; Leasure, C. S.; Vandiver, V. J.
Analytical Chemistry, Vol. 58, Issue 1
https://doi.org/10.1021/ac00292a019

Chemical Detoxification of Trichloroethylene and 1,1,1-Trichloroethane in a Microwave Discharge Plasma Reactor at Atmospheric Pressure
book, February 1993

Krause, T. R.; Helt, J. E.
ACS Symposium Series
https://doi.org/10.1021/bk-1993-0518.ch019

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Title: Method and apparatus for detecting halogenated hydrocarbons

Abstract

Citation Formats

Negative ion mobility spectrometry for selected inorganic pollutant gases and gas mixtures in air journal, January 1986

Chemical Detoxification of Trichloroethylene and 1,1,1-Trichloroethane in a Microwave Discharge Plasma Reactor at Atmospheric Pressure book, February 1993

Negative ion mobility spectrometry for selected inorganic pollutant gases and gas mixtures in air
journal, January 1986

Chemical Detoxification of Trichloroethylene and 1,1,1-Trichloroethane in a Microwave Discharge Plasma Reactor at Atmospheric Pressure
book, February 1993