Chemistry: electrical and wave energy – Processes and products – Processes of treating materials by wave energy
Patent
1987-09-08
1991-04-16
Andrews, R. L.
Chemistry: electrical and wave energy
Processes and products
Processes of treating materials by wave energy
204 1S, 204424, 204425, 204426, 204427, 204428, 204429, B01D 5940
Patent
active
050079883
ABSTRACT:
A method for determining the concentration of a plurality of combustible gases in a gas stream comprises providing an electrochemical cell apparatus that includes an electrochemical cell in which a cavity is formed having a diffusion limiting port forming the entrance to the cavity. The cell has a process side in flow communication with a portion of the gas stream flowing into the cavity through the port, and a reference side in flow communication with a reference gas. The process side and the reference side of the electrochemical cell are separated by an electrolyte. The potential difference across the cell is adjusted to create a steady state electrical current flow. A number of the following current flow measurements are obtained, wherein the number of current flow measurements equals the number of combustible gases in the gas stream: determining the steady state current flowing through the electrolyte, and determining the surge of current flowing through the electrolyte after the flow of current is interrupted and then restored, by interrupting the current for a time period, restoring the flow of current and measuring the surge of current until the current attains its steady state value. The total pressure of the gases in the gas stream is measured, and the total pressure and the current flow measurements are converted into an indication of the concentration of each of the combustible gases in the gas stream.
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Ahmed Mohammed M.
Archer David H.
Abeles D. C.
Andrews R. L.
Westinghouse Electric Corp.
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