| 摘要 |
PURPOSE:To produce nitric acid in excellent workability at a low cost, using a raw material abundant in atmosphere, by introducing high-intensity hard X-ray into an atmosphere containing O2, N2 and steam and carrying out photochemical reaction under normal temperature and pressure condition. CONSTITUTION:A hard X-ray having an energy E of 4-25keV and an intensity of about 10<16> photons/sec/(mrad)<2>, e.g. a synchrotron radiation is introduced through a vacuum pipe 1 and a Be window 3 into a chamber 4. Separately, a gaseous mixture of O2, N2 and steam produced by passing O2 gas of an O2 bomb 5 and N2 gas of an N2 bomb 6 into a water container 7 is introduced through a gas inlet port 10 into the chamber 4 and subjected to photochemical reaction under normal temperature and pressure condition to fix N2. The obtained nitric acid 9 is discharged from an outlet 11 and collected in a nitric acid container 8. |
