非热平衡等离子协同催化混合废塑料热解制备芳烃的机理研究

随着我国塑料产量的增加，实现混合低值废塑料高值化清洁处理迫在眉睫。催化热解虽然可以将废塑料转化为液相有机物，但面临着催化热解产物组分杂、品质差，且催化剂易失活的问题。而非热平衡等离子体由于电子能量高、离子温度低，被广泛地用于重质物质的分解。基于以上特点，本项目创新性的提出非热平衡等离子体原位重整混合废塑料热解产物协同酸催化制备芳烃的研究。通过对协同体系的参数调控实现混合废塑料一次热解产物的原位均相重整，优化产物分布。利用非热平衡等离子体协同固体酸催化实现热解产物的定向芳构化调控，并基于等离子体与催化剂的协同作用，原位增强催化剂的抗结焦能力。项目的科学性在于通过非热平衡等离子体协同催化体系的建立，大幅提高高附加值目标产物芳烃的选择性，同时通过混合废塑料催化芳构化的机理和等离子体对催化过程定向调控的研究，也可以为其他低品位有机聚合物的高效资源化利用提供新思路。

With the increase of plastic output in China, it is urgent to realize the high value cleaning treatment of mixed low value waste plastics. Although catalytic pyrolysis can transform waste plastics into liquid-phase organics, it faces the problems of miscellaneous components, poor quality and deactivation of catalyst. However, due to the high electron energy and low ion temperature, non-thermal plasma is widely used in the decomposition of heavy matter. Based on the above characteristics, this project innovatively proposes the research on the synthesis of aromatics by non thermal plasma in-situ reforming the pyrolysis products of mixed waste plastics with acid catalysis. In order to optimize the product distribution, in-situ homogeneous reforming of the products from the primary pyrolysis of mixed waste plastics was realized by adjusting the parameters of the collaborative system. Based on the synergistic effect of plasma and catalyst, the anti coking ability of unmodified catalyst was enhanced in situ. The s cooperative system can improve the selectivity of target products with high added value under the condition of low pyrolysis energy consumption in situ. At the same time, through the study of the mechanism of catalytic aromatization of waste plastics and the directional control of the catalytic process by plasma, it can also provide new ideas for the disposal and resource utilization of other low-grade solid wastes.