Greenhouse gas emissions and socioeconomic effects of biomass-derived products based on structural path and life cycle analyses: A case study of polyethylene and polypropylene in Japan
Greenhouse gas emissions and socioeconomic effects of biomass-derived products based on structural path and life cycle analyses: A case study of polyethylene and polypropylene in Japan
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DOI：
10.1016/j.jclepro.2017.08.179
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发表时间：
2017-11
影响因子：
11.1
通讯作者：
Yasunori Kikuchi;Yuko Oshita;Kazuya Mayumi;M. Hirao
中科院分区：
文献类型：
--
作者：
Yasunori Kikuchi;Yuko Oshita;Kazuya Mayumi;M. Hirao
以生物质为原料，通过乙醇脱水、二聚、歧化、歧化等反应合成聚乙烯(PE)和聚丙烯(PP)。本文考察了这种生物质衍生树脂生产的社会经济方面，包括通过生命周期分析(LCA)量化的环境影响和基于日本投入产出表的结构路径分析(SPA)确定的产生价值流的结构。缺失的库存数据通过使用Aspen Plus™和Aspen HYsys™使用从文献、专利和设计启发式中提取的设计信息进行流程模拟来估计。基于实际工厂和示范工厂的LCA流程模拟，展示了生物质衍生树脂在温室气体(GHG)减排方面的环境优势。PE生产对温室气体减排的影响最大，其次是汽油混合物中的生物乙醇和PP。农业过程中的不确定性也影响了国际和国内生物乙醇生产和废木气化合成气体的潜在应用。根据汽油、PE、PP和塑料产品的SPA结果，从目标产品到最终需求的总循环现金流的定量分析表明，树脂和塑料产品的周期性远远大于汽油。根据这些结果，生物质衍生树脂的生产有可能在经济中增加附加值，同时相应地减少温室气体排放。
Polyethylene (PE) and polypropylene (PP) can be synthesized from biomass through dehydration, dimerization, and metathesis reactions from ethanol or methanol-to-olefin reaction of synthesis gas. This paper examines the socioeconomic aspects of such biomass-derived resin production, which are composed of environmental impacts quantified by life cycle analysis (LCA) and the structure of generated value flows specified by structural path analysis (SPA) based on a Japanese input–output table. Missing inventory data were estimated by process simulation using Aspen Plus™ and Aspen HYSYS™ with design information extracted from the literature, patents, and design heuristics. LCA based on actual and demonstration plants with process simulation shows the environmental advantage of biomass-derived resins on greenhouse gas (GHG) emissions reduction. PE production has the largest effect on GHG emissions reduction, followed by bioethanol from a gasoline mixture, and PP. The uncertainties in agricultural processes also influence the potential application of international and domestic bioethanol production and synthesis gas obtained from the gasification of waste woods. According to SPA results for gasoline, PE, PP, and plastic products, the cyclicality of resins and plastic products, which was quantitatively analyzed as the total cyclic cash flows from target products to final demands, is much larger than that of gasoline. Based on these results, biomass-derived resin production has the potential to increase added values in an economy, with a corresponding decrease in GHG emissions.