Techno-Economic and Life Cycle Analyses of Thermochemical Upcycling Technologies of Low-Density Polyethylene Waste
Techno-Economic and Life Cycle Analyses of Thermochemical Upcycling Technologies of Low-Density Polyethylene Waste
复制标题
低密度聚乙烯废料热化学升级回收技术的技术经济和生命周期分析
DOI：
10.1021/acssuschemeng.3c00636
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发表时间：
2023
影响因子：
8.4
通讯作者：
Ierapetritou, Marianthi G.
中科院分区：
文献类型：
--
作者：
Hernández, Borja;Kots, Pavel;Selvam, Esun;Vlachos, Dionisios G.;Ierapetritou, Marianthi G.
在这项研究中，我们比较了热化学解聚技术，包括热解，气化，加氢裂化，水热液化和氢解，从低密度聚乙烯（LDPE）废物产生各种产品的技术经济和生命周期评估。我们阐明的影响，生产规模，收集成本，和浓度的低密度聚乙烯塑料废物。将LDPE热解为烯烃，然后将其转化为润滑油是最有利可图的技术。氢解生产一小部分润滑油，在工厂规模超过25 kt/y时变得有利可图，并产生最低的CO2排放。加氢裂化是第二环保的技术，但在足够大的规模上具有经济竞争力，并且收集塑料的供应链得到优化。将LDPE气化为H2产生高排放，并且H2的价格为103美元/千克，高于当前市场和最近宣布的目标。同样，水热液化也会产生高排放，这使得碳捕获系统对这两种技术都是必不可少的。我们的研究结果表明，降低从塑料废物中分选LDPE的成本，在大城市附近收集废物，建造足够大的工厂，以及实现对增值产品的高选择性，对于成功的塑料废物管理至关重要。
In this study we compare techno-economics and life cycle assessment of thermochemical depolymerization technologies, including pyrolysis, gasification, hydrocracking, hydrothermal liquefaction, and hydrogenolysis, to generate various products from low-density polyethylene (LDPE) waste. We elucidate the effects of production scale, collection cost, and concentration of LDPE in plastic waste. Pyrolysis of LDPE to olefins followed by their conversion to lubricant oils is the most profitable technology. Hydrogenolysis, producing a small fraction of lubricant oils, becomes profitable at plant sizes above 25 kt/y and produces the lowest CO2emissions. Hydrocracking is the second most environmentally friendly technology but becomes economically competitive at sufficiently large scales, and the supply chain for collecting plastics is optimized. Gasification of LDPE to H2produces high emissions, and the price of H2of ∼3 $/kg is higher than current markets and recently announced goals. Similarly, hydrothermal liquefaction also gives high emissions, making carbon capture systems imperative for both technologies. Our results demonstrate that lowering the cost of sorting LDPE from plastic waste, collecting waste near big cities, building sufficiently large plants, and achieving high selectivity to value-added products are critical to successful plastic waste management.
废轮胎/废塑料液化技术经济可行性及合成流程
DOI：
--
发表时间：
1999
期刊：
影响因子：
--
作者：
M. D. Shelley;M. El‐Halwagi
通讯作者：
M. El‐Halwagi
通过固体酸温和浆料微波热解将塑料废物升级为烯烃
DOI：
--
发表时间：
2022
期刊：
Social Science Research Network
影响因子：
--
作者：
Esun Selvam;P. Kots;Borja Hernández;Abhinav Malhotra;Weiqi Chen;J. Catalá;J. Santamaria;M. Ierapetritou;D. Vlachos
通讯作者：
D. Vlachos