| 摘要 |
The present invention provides methods and apparatus for the preparation of nitrogen fertilizers including ammonium nitrate, urea, urea-ammonium nitrate, and/or ammonia, at low temperature and pressure utilizing a source of carbon, a source of nitrogen, and/or a source of hydrogen or hydrogen equivalent. Implementing electrolyte serving as ionic charge carrier, (1) ammonium nitrate is produced via reduction of nitrogen source at the cathode and oxidation of nitrogen source at the anode; (2) urea or its isomers are produced via simultaneous cathodic reduction of carbon source and nitrogen source; (3) ammonia is produced via reduction of nitrogen source at the cathode and oxidation of hydrogen source or a hydrogen equivalent such as carbon monoxide or a mixture of carbon monoxide and hydrogen at the anode; and (4) urea-ammonium nitrate is produced via simultaneous cathodic reduction of carbon source and nitrogen source, and anodic oxidation of nitrogen source. |
