RE: Advice from knowledgeable folk please20 May 2025 07:44
The figure for AFC I’ve been given (via a net scraper) is 9.5kwh/kg for the cracker tech.
Some more info below, and the last one is unquantified but will depend on how the ammonia is made and how far it needs to travel.
Key Points
• AFC Energy’s cracker requires about one-quarter of the electrical energy per kilogram of hydrogen compared to a state-of-the-art solid oxide electrolyser (9.5 kWh/kg vs. 37 kWh/kg).
• Compared to typical alkaline or PEM electrolysers, the cracker is even more efficient, requiring less than one-fifth the electrical input.
• The cracker’s advantage comes from reconverting hydrogen from ammonia, rather than splitting water, and its ability to leverage waste heat and byproducts.
• However, the overall energy chain for hydrogen from ammonia includes the energy used in ammonia synthesis and transportation, which is not included in the cracker’s electrical input figure.