Opportunity and challenge of seaweed bioethanol based on life cycle CO2 assessment
Opportunity and challenge of seaweed bioethanol based on life cycle CO2 assessment
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DOI：
10.1002/ep.12446
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发表时间：
2017
影响因子：
2.8
通讯作者：
Kyung A Jung;Seong-Rin Lim;Yoori Kim;Jong Moon Park
中科院分区：
文献类型：
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作者：
Kyung A Jung;Seong-Rin Lim;Yoori Kim;Jong Moon Park
正在开发海藻生物乙醇技术，以缓解气候变化，并克服陆地生物乙醇的经济和环境缺点：生物质对粮食和能源的需求竞争，以及土地利用变化的影响。为了研究海藻生物乙醇是否优于陆地生物乙醇，我们从生命周期的角度比较了海藻和陆地生物乙醇的全球变暖潜能值（GWP），包括与土地相关的碳债务，土壤碳封存和N2 O排放的GWP效应。我们的研究结果表明，海藻生物乙醇具有较低的全球变暖潜势在长期比陆地生物乙醇从玉米粒，玉米秸秆，柳枝稷，主要是因为海藻种植不消耗化肥，并产生碳债务和N2 O排放。据指出，未来低碳海藻生物乙醇的研发战略需要致力于开发基于生物材料的养殖设备和重复利用现有设备，以及提高生物乙醇转化率和生物质生产率。由于广阔的海洋可用于海藻种植，海藻生物乙醇可以大大有助于减缓气候变化。© 2016美国化学工程师学会环境规划，36：200-207，2017
Seaweed bioethanol technology is being developed to mitigate climate change and to overcome economic and environmental drawbacks that terrestrial bioethanol has: biomass demand competition for food and energy, and land‐use change impacts. To investigate whether seaweed bioethanol is better than terrestrial bioethanol, we compare the global warming potentials (GWPs) of seaweed and terrestrial bioethanols from a life cycle perspective including land‐related GWP effects from carbon debt, soil carbon sequestration, and N2O emission. Our results demonstrated that seaweed bioethanol has lower GWP in the long term than terrestrial bioethanols from corn grain, corn stover, and switchgrass, primarily because seaweed cultivation does not consume fertilizers and incur carbon debt and N2O emission. It was noted that future R&D strategy for low‐carbon seaweed bioethanol needs to be directed to developing biomaterial‐based cultivation equipment and reusing existing equipment, as well as enhancing bioethanol conversion yield and biomass productivity. Due to the vast sea available for seaweed cultivation, seaweed bioethanol could significantly contribute to mitigating climate change. © 2016 American Institute of Chemical Engineers Environ Prog, 36: 200–207, 2017