关键词: 塑料降解, 催化, 增值化, 碳利用效率, 新型反应体系

Abstract:

The catalytic valorization of plastics is crucial for addressing the global plastic pollution crisis, yet large-scale commercial applications face several challenges. This paper focused on recent advancements in overcoming the challenges of plastic catalytic valorization, specifically addressing the two most significant issues in the chemical upgrading of plastic recycling, i.e., low conversion efficiency and high energy consumption. Furthermore, we explored methods for enhancing the efficient utilization of plastic waste by improving the carbon utilization efficiency in traditional catalytic systems. The paper also reviewed the progress of novel reaction systems for plastic valorization under mild experimental conditions. Through a systematic discussion of catalysts, reaction processes and other aspects in both traditional and emerging plastic catalytic conversion methods, this review proposed the use of external field intensification techniques such as microwaves and plasma or other renewable energy sources to overcome the limitations of conventional heat transfer methods based on convection and thermal radiation. By leveraging the synergistic effects of different energy forms, this approach provided new perspectives for future research aimed at promoting the sustainable recycling and valorization of plastic waste.

Key words: plastic degradation, catalysis, value addition, carbon utilization efficiency, novel reaction systems