Fig. 7: Techno-Economic Analysis and Carbon Footprint Analysis.
From: Photothermal-electrocatalysis interface for fuel-cell grade ammonia harvesting from the environment
a Evaluation of the economic viability of ammonia production via PTEI. This assessment considers two technological scenarios: the base case and the optimistic case (Supplementary Table 7). The light blue shaded area represents the market price of anhydrous ammonia over the past three years44. b The Global Warming Potential (GWP) of Ammonia Production via the Haber–Bosch process and electrochemical treatment of nitrate wastewater. The scenarios include: Approach I: the current Haber-Bosch process, II: P-NOxRR (The plasma system combines with NOxRR but without PTEI), III: P-PE-NOxRR, IV: W-NOxRR (NOxRR for wastewater treatment but without PTEI), and V: W-PE-NOxRR. The GHG emissions are indicated by black numbers when ammonia is stored, and by green numbers when it is used as green fuel for power generation.
