We found a match
Your institution may have rights to this item. Sign in to continue.
- Title
Achieving volatile potassium promoted ammonia synthesis via mechanochemistry.
- Authors
Kim, Jong-Hoon; Dai, Tian-Yi; Yang, Mihyun; Seo, Jeong-Min; Lee, Jae Seong; Kweon, Do Hyung; Lang, Xing-You; Ihm, Kyuwook; Shin, Tae Joo; Han, Gao-Feng; Jiang, Qing; Baek, Jong-Beom
- Abstract
Potassium oxide (K2O) is used as a promotor in industrial ammonia synthesis, although metallic potassium (K) is better in theory. The reason K2O is used is because metallic K, which volatilizes around 400 °C, separates from the catalyst in the harsh ammonia synthesis conditions of the Haber-Bosch process. To maximize the efficiency of ammonia synthesis, using metallic K with low temperature reaction below 400 °C is prerequisite. Here, we synthesize ammonia using metallic K and Fe as a catalyst via mechanochemical process near ambient conditions (45 °C, 1 bar). The final ammonia concentration reaches as high as 94.5 vol%, which was extraordinarily higher than that of the Haber-Bosch process (25.0 vol%, 450 °C, 200 bar) and our previous work (82.5 vol%, 45 °C, 1 bar). Potassium oxide is used as a promotor in industrial ammonia synthesis, although metallic potassium is better in theory. Here, the authors demonstrate metallic potassium, an unstable metal that easily volatilizes at high temperature, can be used as a promotor for ammonia synthesis.
- Subjects
HABER-Bosch process; POTASSIUM; MECHANICAL chemistry; AMMONIA; LOW temperatures; HIGH temperatures
- Publication
Nature Communications, 2023, Vol 14, Issue 1, p1
- ISSN
2041-1723
- Publication type
Article
- DOI
10.1038/s41467-023-38050-2