Abstract
The AC high-voltage discharge-induced decomposition chemistry of trace levels of hydrogen cyanide in helium has been studied. In the absence of oxygen only low levels of molecular nitrogen were evolved. With oxygen added, the principal products were CO, CO2, and N2. No significant concentrations of NO or N2O were observed. The response of a commercial NOx analyzer to HCN and C2N2, in the NOx mode, was determined to be linear through three decades in concentration. The oxidation chemistry of HCN and C2N2 in the stainless steel converter of the analyzer was studied as a function of the amount of added oxygen.
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