Life cycle techno-economic and carbon footprint analysis of H2 production via NH3 decomposition: A Case study for the Republic of Korea

Abstract

As NH3 has received extra attention expected to play a key role as an H2 carrier with desirable physical and chemical properties, H2 production via NH3 decomposition becomes a promising way to supply H2 in a cost-competitive and eco-friendly manner. In this study, life cycle techno-economic and carbon footprint analysis is conducted to investigate the feasibility of the NH3 decomposition process in terms of economic performance and CO2 emissions. In particular, the life cycle NH3 supply chain for H2 production is considered including production, transportation, and decomposition back to H2. Based on the classification of NH3 into three different types depending on how the chemical is produced, NH3 price and CO2 emissions are evaluated. In addition, using a commercial process simulator, the decomposition process is modeled and techno-economic analysis for the whole process for H2 production reveals that NH3 price is the most influential economic factor and the H2 production cost can compete with renewable-based H2 but it is still higher than fossil fuel-based H2 production. Moreover, H2 supply via NH3 decomposition is projected based on a domestic implementation plan in the Republic of Korea resulting in estimation of NH3 price, H2 production cost, and corresponding CO2 emissions in the future.