In the scope of energy transition and overall decarbonisation, various alternative fuels are investigated as potential substitutes for conventional fossil fuels. Co-pyrolysis has emerged as a potential solution for production of alternative fuels, while dealing with waste management issues, due to its ability to process different feedstocks. Biomass-derived fuels, with all their constraints, are already used on a commercial scale. Simultaneously, significant efforts are given to scale up fuel production from the thermal treatment of waste plastics. The fuel must be produced sustainably with minimal environmental impacts to be considered an alternative. This study presents the life cycle assessment (LCA) of waste biomass and plastic materials, co-pyrolysed with an aim to produce pyrolysis oil that could be used as a petroleum substitute. Moreover, the environmental impacts from the co-pyrolysis are compared to incineration and landfilling, which are today mostly used to deal with end-of-life plastics. The LCA is carried out in openLCA software using ReCiPe Midpoint 2016, and Environmental footprint methods. Results show that co-pyrolysis mostly reduces emissions associated with environmental impacts, even though this greatly depends on the treatment method used to divert the feedstock. Furthermore, most process emissions are associated with electricity consumption, therefore, integration of plastic processing with renewable energy sources can further reduce the environmental impacts. Finally, the products derived from the process should be of high quality with minimal after-treatment requirements to effectively substitute fossil fuels.

在能源转型和整体脱碳的范围内，各种替代燃料被研究作为传统化石燃料的潜在替代品。共热解已成为替代燃料生产的潜在解决方案，同时由于其处理不同原料的能力，它还可以处理废物管理问题。生物质衍生燃料尽管有其所有限制，但已经在商业规模上使用。同时，大力扩大废塑料热处理燃料的生产规模。燃料必须以可持续的方式生产，对环境的影响最小，才能被视为替代品。本研究介绍了生命周期评估(LCA) 废生物质和塑料材料，共热解，目的是生产可用作石油替代品的热解油。此外，将共热解对环境的影响与焚烧和填埋进行了比较，后者目前主要用于处理报废塑料。LCA 是在 openLCA 软件中使用 ReCiPe Midpoint 2016 和环境足迹方法进行的。结果表明，共热解主要减少与环境影响相关的排放，尽管这在很大程度上取决于用于转移原料的处理方法。此外，大多数过程排放都与电力消耗有关，因此，塑料加工与可再生能源可以进一步减少对环境的影响。最后，从该过程中获得的产品应该是高质量的，对后处理的要求最低，才能有效地替代化石燃料。