A Review of the Life Cycle Analysis for Plastic Waste Pyrolysis

Pyrolysis is a rapidly expanding chemical-based recyclable method that complements physical recycling. It avoids improper disposal of post-consumer polymers and mitigates the ecological problems linked to the production of new plastic. Nevertheless, while there is a consensus that pyrolysis might be a crucial technology in the years to come, more discussions are needed to address the challenges related to scaling up, the long-term sustainability of the process, and additional variables essential to the advancement of the green economy. Herein, it emphasizes knowledge gaps and methodological issues in current Life Cycle Assessment (LCA), underlining the need for standardized techniques and updated data to support robust decision-making for adopting pyrolysis technologies in waste management strategies. For this purpose, this study reviews the LCAs of pyrolytic processes, encompassing the complete life cycle, from feedstock collection to end-product distribution, including elements such as energy consumption, greenhouse gas emissions, and waste creation. Hence, we evaluate diverse pyrolysis processes, including slow, rapid, and catalytic pyrolysis, emphasizing their distinct efficiency and environmental footprints. Furthermore, we evaluate the impact of feedstock composition, process parameters, and scale of operation on the overall sustainability of pyrolysis-based plastic waste treatment by integrating results from current literature and identifying essential research needs. Therefore, this paper argues that existing LCA studies need more coherence and accuracy. It follows a thorough evaluation of previous research and suggests new insights into methodologies and restrictions.

The Research of Project Evaluation System of R＆D Based on Cycle Economy

The evaluation system of R＆D project beforehand, in the course and afterwards embodies the principle and standard of the cycle economy, which can not only avoid the negative effects caused, by the utilization of the achievements of R＆D project in the industry but also point out the direction and criterion of R＆D activities for the enterprises, which also provides the ＂model＂ that can be used for reference for maintaining the durable competitiveness of the enterprises.

Planning of Urban Cycling Routes Aiming at Improving Cycling Quality

Urban cycling environment is an important part of urban slow-moving system,and reasonable route planning is beneficial to the health of residents.In order to improve residents’ cycling quality and enrich travel experience,the evaluation system of cycling quality in the main urban area of Handan City was established from the four aspects of convenience,safety,comfort and experience.According to different travel needs,the cycling evaluation index of road sections was calculated and modified to obtain the cycling time of road sections.The shortest route algorithm was used to generate the best riding route for convenience,the best riding route for safety,the best riding route for comfort,and the best riding route for experience.Cycling evaluation indicators were combined with travel route planning to provide residents with a variety of humanized route options,and effectively improve the cycling quality and travel health of residents,which is of great significance to promoting green travel and improving residents’ health.