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Integrative techno-economic and environmental assessment for green H2 production by alkaline water electrolysis based on experimental data
Journal of Environmental Chemical Engineering ( IF 7.7 ) Pub Date : 2021-09-20 , DOI: 10.1016/j.jece.2021.106349
Boreum Lee 1, 2 , Hyun-Seok Cho 3 , Heehyang Kim 1 , Dongjun Lim 1 , Wonchul Cho 3 , Chang-Hee Kim 3 , Hankwon Lim 1, 4
Affiliation  

Alkaline water electrolysis has been in the spotlight for green H2 production using electricity generated from renewable energy because of its high technology readiness level and low investment. However, commercialization of alkaline water electrolysis is challenging because of the low current density. Therefore, a techno-economic and environmental assessment was conducted for green H2 production by alkaline water electrolysis with experimental data from the advanced alkaline water electrolysis system of the Korea Institute of Energy Research (KIER) to identify the potential of this technology. Based on techno-economic analysis results, the stack cost and unit electricity price must be below 0.035 $ kWh-1 and 406 $ kW-1, respectively, to make this technology cost-competitive compared to the conventional H2 production method (< 2 $ kgH2-1). Furthermore, CO2 emissions of 30.7, 17.4, 7.04, and 3.12 kgCO2-eq kgH2-1 were obtained for the current, 2030, 2050, and renewable Korean electricity mix scenarios, respectively, indicating that both scenarios (Korean electricity mix in 2050 and renewable) have lower CO2 emissions than the conventional H2 production method (11.5 kgCO2-eq kgH2-1). In addition, environmental impact reductions of 89.8%, 83.6%, 65.9%, and 91.0% for CO2 emissions, stratospheric ozone depletion, fine particulate matter formation, and fossil resource scarcity, respectively, were obtained for the renewable scenario compared to the current Korean electricity mix. Therefore, the electricity source has significant effects on the economic feasibility and total CO2 emissions for green H2 production.



中文翻译:

基于实验数据的碱性水电解制氢绿色技术经济与环境综合评价

碱性水电解因其技术成熟度高和投资少而成为利用可再生能源发电的绿色 H 2生产的焦点。然而,由于电流密度低,碱性水电解的商业化具有挑战性。因此,利用来自韩国能源研究所 (KIER) 先进碱性水电解系统的实验数据,对碱性水电解生产绿色 H 2进行了技术经济和环境评估,以确定该技术的潜力。根据技术经济分析结果,电堆成本和单位电价必须低于0.035 $ kWh -1和406 $ kW -1,分别使该技术与传统的 H 2生产方法(< 2 $ kgH 2 -1)相比具有成本竞争力。此外,CO 2排放量的30.7°,17.4°,7.04,3.12和kgCO 2当量KGH 2 -1当前,2030年,2050年,和可再生的韩国电力结构情况下,分别得到,表明这两种情况下(在韩国电力混合2050和可再生)具有较低的CO 2比常规ħ排放2制造方法(11.5 kgCO 2当量KGH 2 -1)。此外,CO 2对环境的影响减少了 89.8%、83.6%、65.9% 和 91.0%与当前韩国电力组合相比,可再生能源情景分别获得了排放、平流层臭氧消耗、细颗粒物形成和化石资源稀缺性。因此,电源对绿色H 2生产的经济可行性和CO 2总排放量具有显着影响。

更新日期:2021-09-21
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