저탄소 수소 생산을 위한 암모니아 분해 공정과 고체산화물 전해조-자열개질 통합 공정의 3E(기술⋅경제⋅환경) 비교 분석

초록

To reduce CO₂ emissions generated by industrial activities, countries worldwide are consistently making various efforts. Hence, multiple strategies are also being found in the hydrogen industry to reduce CO₂ emissions. This study develops two low-carbon hydrogen production processes such as an ammonia cracking process (ACP) and a solid oxide electrolysis cell–autothermal reforming integrated process (SAP) to reduce CO₂ emissions and evaluate them in terms of energy efficiency, economic feasibility, and environmental performance. The energy efficiencies of ACP and SAP were 87.1% and 78.6%, respectively. The levelized cost of hydrogen (LCOH) for SAP increased by approximately 20.0% compared to ACP due to the addition of PR and ATR reactors and the higher electricity consumption. In addition, the CO₂ emissions of SAP were approximately 912.9% higher than those of ACP because SAP produces both direct CO₂ from the ATR system and indirect CO₂ from power consumption. Therefore, ACP outperforms SAP in all aspects when producing the same amount of hydrogen. This study is expected to contribute to the development of technologies required to establish a sustainable hydrogen economy.

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