본 연구는 저탄소 수소 생산 방식인 Blue 수소의 온실가스 배출량을 전과정평가 관점에서 분석하였다. 특히, Scope

1, 2뿐만 아니라 Scope 3 배출량을 포함하여 종합적으로 평가하였다. 미국 Argonne 국립 연구소에서 개발한 GREET

모델을 활용하여 Blue 수소 생산 과정에서 발생하는 온실가스 배출량을 산정하였으며, 한국의 국가 특수성을 고려하

여 다양한 원료 수입 시나리오를 설정하고 분석하였다. 연구 결과, Scope 3 배출량이 전체 온실가스 배출량의 상당 부

분을 차지하는 것으로 나타났으며, 특히 원료 채굴 및 가공 과정에서 발생하는 배출량이 큰 비중을 차지하였다. 또한,

수소의 저장 및 운송 방식에 따라 배출량의 차이가 있음을 확인하였다. 본 연구는 Blue 수소 생산의 전과정에서 발생

하는 온실가스 배출량을 종합적으로 분석함으로써, 향후 저탄소 수소 경제 실현을 위한 정책 수립 및 기업의 탄소 중

립 전략 수립에 필요한 기초 자료를 제공할 것으로 기대된다.

This study comprehensively analyzes the greenhouse gas (GHG) emissions of blue hydrogen production

from a life cycle assessment perspective, incorporating not only Scope 1 and 2 but also Scope 3 emissions. Utilizing the

GREET model developed by Argonne National Laboratory, we estimated the GHG emissions throughout the blue

hydrogen production process. Various raw material import scenarios were established and analyzed, considering South

Korea's specific national circumstances. The results indicate that Scope 3 emissions account for a significant portion of

the total GHG emissions, with the extraction and processing of raw materials contributing substantially. Furthermore, the

study reveals variations in emissions depending on hydrogen storage and transportation methods. This research provides

a comprehensive analysis of GHG emissions across the entire life cycle of blue hydrogen production, offering valuable

insights for policymakers and companies in developing strategies for achieving a low-carbon hydrogen economy and

carbon neutrality goals.

Blue hydrogen, Scope 1,2,3 emissions, GHG Protocol, GREET model, Life cycle assessment

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