HCL monitoring apparatus and method for process gas streams

Details HCL monitoring apparatus and method for process gas streams HCL monitoring apparatus and method for process gas streams

1990-01-08

1992-08-04

Stoll, Robert L.

Chemistry: analytical and immunological testing

Inorganic acid or base

Halogen containing

436121, 436122, 436123, 422 62, 422 90, 422 88, G01N 3300, G01N 2100, G01N 3096

Patent

active

H00010936

ABSTRACT:
An HCl monitor is provided for the extractive analysis of high-temperature, high-pressure, coal-derived process streams. The monitor is capable of HCl concentration measurement in the presence of all known coal gasification products, with detection being based on the ability of HCl to protonate a high boiling alcohol (solvent) and, thus, enhance the conductivity of the alcohol. Conductivity is then related to HCl concentration. The observed high degree of sensitivity that can be achieved is a result of analyte preconcentration prior to the conductivity measurement due to the fast dissolution rate of HCl into the alcohol solvent, coupled with a large analyte gas-to-solvent ratio.

REFERENCES:
Wachter, J. K., "Development of an extractive, continuous monitor to analyze hydrogen chloride in coal derived process streams." Energy Res. Abstr. 1988 13(23) 28 pages 1988.
Afendik, K. F. et al. "Continuous method for the determination of hydrochloric acid in waste gases . . . " Deposited Doc., SPSTL 303 khp-D80, 9 pages.
Wachter, J. et al. "Hydrogen chloride monitor", Morgantown Energy Technol. Cat., Direct Util. Contract Meet., 1985 423-30.
Cram, J. M. et al. "The Essene of Organic Chemistry", Addison-Wesley Pub Co., Philippines 1978 pp. 113-114.
Gregg G. Huston, et al., "Development of an Extractive Continuous Monitor for Hydrogen Chloride Analysis of Coal-Derived Process Stream," Analytical Letters, 22(1), 269-292 (1989).

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