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Carbon-free Green Hydrogen Production Process with Induction Heating-based Ammonia Decomposition Reactor

Abstract

This study presents an induction heating-based reactor for ammonia decomposition and to achieve a 150 Nm3 /h carbon-free green hydrogen production process. The developed metallic monolith reactor acts by increasing the reactor temperature through an electromagnetic induction method using renewable-based electricity. As a result, hydrogen is produced without the generation of air pollutants such as CO2, which are formed via the conventional production pathway. Furthermore, techno-economic analysis was conducted based on exergy and economic analysis to evaluate the feasibility of the developed process. Experimentally, the proposed reactor showed an ammonia conversion of 90.0 % at 600 ℃ and 7 barg. Exergy analysis indicated that the total unused exergy accounted for 45.79 % of the total exergy input, giving an exergy efficiency of 54.21 % for the overall process. Furthermore, the CAPEX and OPEX values are calculated as 1,599,567 USD and 644,719 USD/y, respectively; therefore, the levelized cost of hydrogen (LCOH) was calculated to be 6.98 USD/kgH2. This study also demonstrated that the LCOH varies with the ammonia feed price and the process capacity, and so it would be expected to decrease from 6.98 to 5.33 USD/kgH2 as the hydrogen production capacity is increased from 150 to 500 Nm3 / h. Overall, our results confirm the feasibility of carbon-free green hydrogen production on on-site hydrogen refueling stations, and they will be expected to advance the development of an environmental hydrogen economy.

Funding source: This work was supported by the Korea Institute of Industrial Technology within the framework of the “Development and application of carbon-neutral engineering platform based on carbon emission database and prediction model“ project [Grant No. KM-22-0348] and the “Development of Global Optimization System for Energy Process” project [Grant Nos. IR-22-0040, IZ-22-0049, UR-22-0031]. This work was supported by the Technology Innovation Program (20005690, Development of three-dimensional metal structured De-NOx catalyst) funded by the Ministry of Trade, Industry & Energy (MOTIE, Korea).
Related subjects: Production & Supply Chain
Countries: Korea, Republic of
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/content/journal5608
2022-12-28
2024-06-20
/content/journal5608
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