Abstract
Ammonia is made by combining nitrogen and hydrogen at high pressure. In the conventional process on the left, these gases are partially reacted at about 400 °C, and ammonia is recovered by condensation at -20 °C. In an alternative shown in the center, the reactor is the same, but the more complete separation is conducted by absorption in metal chlorides at about 150-400 °C. In this work, both reaction and absorption are integrated to occur in the same vessel at 400 °C. Experiments are conducted by combining a conventional Fe-based catalyst with NiCl2 and MgCl2 sorbents in a semibatch reactor in the presence of stoichiometric nitrogen and hydrogen gases. This alternative has synthesis rates comparable with the other two but with a lower capital investment necessary for distributed ammonia synthesis using solar or wind energy.
Original language | English (US) |
---|---|
Pages (from-to) | 18785-18792 |
Number of pages | 8 |
Journal | ACS Sustainable Chemistry and Engineering |
Volume | 7 |
Issue number | 23 |
DOIs | |
State | Published - Dec 2 2019 |
Bibliographical note
Publisher Copyright:© 2019 American Chemical Society.
Keywords
- absorption
- ammonia
- reaction
- sustainable