| dc.description.abstract | Decarbonization of the ammonia production industry would require the use of innovative low-carbon production technologies. The use of electrolyser-based ammonia production instead of steam methane reforming may potentially reduce emissions from ammonia production significantly. This paper presents the results from the techno-economic assessment of the green ammonia production plant connected to the Norwegian electricity grid.
The desalination system and alkaline electrolyser (hydrogen production), air separation unit (nitrogen production), ammonia reactor, and ammonia storage unit were considered as the main steps in the scheme of the green ammonia production plant.
The system used 0.17 tons of hydrogen and 0.83 of nitrogen to form 1 ton of green ammonia. The specific energy consumption for the green ammonia production plant was found to be 10.02 MWh/ ton NH3 The water electrolysis system with a respective electrolyser efficiency at stack 4.4 kWh/Nm3 consumed 53.13 MWh/ ton H2 The main source of emission was considered to be only the carbon intensity factor of the grid at the level of 25 kg CO2 /MWh. Uncertainty and sensitivity analysis were conducted for the NPV of the base case scenario, scenario 1 and scenario 2. Breakeven study was conducted for scenario 1 and scenario 2. | |
