Abstract
• Process simulation model for NH 3 decomposition over Ru–K/CaO catalyst is developed. • Life cycle economic analysis is conducted for H 2 production via NH 3 decomposition. • Carbon footprint analysis reveals NH 3 production pathways are the most influential. • NH 3 price, H 2 production cost, and CO 2 emissions in NH 3 decomposition are projected. As NH 3 has received extra attention expected to play a key role as an H 2 carrier with desirable physical and chemical properties, H 2 production via NH 3 decomposition becomes a promising way to supply H 2 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 NH 3 decomposition process in terms of economic performance and CO 2 emissions. In particular, the life cycle NH 3 supply chain for H 2 production is considered including production, transportation, and decomposition back to H 2 . Based on the classification of NH 3 into three different types depending on how the chemical is produced, NH 3 price and CO 2 emissions are evaluated. In addition, using a commercial process simulator, the decomposition process is modeled and techno-economic analysis for the whole process for H 2 production reveals that NH 3 price is the most influential economic factor and the H 2 production cost can compete with renewable-based H 2 but it is still higher than fossil fuel-based H 2 production. Moreover, H 2 supply via NH 3 decomposition is projected based on a domestic implementation plan in the Republic of Korea resulting in estimation of NH 3 price, H 2 production cost, and corresponding CO 2 emissions in the future.
Published Version
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