Journal of Engineering Research

The co-production of carbon black and fuel gas through microwave pyrolysis of waste rubber is an efficient resource utilization technology, and its energy efficiency directly affects the feasibility and promotion value of the process. This paper conducts a systematic evaluation on the energy conversion efficiency, product distribution characteristics, and system energy consumption distribution of the process, constructs an evaluation model based on energy recovery rate and energy efficiency ratio, and quantifies the impact mechanism of key operating parameters on energy efficiency. Microwave power, heating rate, and carrier gas flow rate significantly affect the calorific value of fuel gas and the yield of regenerated carbon black. Under optimized conditions, the energy recovery rate can reach 78.5%, which is significantly better than traditional pyrolysis methods. Exergy analysis reveals that energy loss is mainly concentrated in the pyrolysis gas condensation and microwave conversion links, and strategies of waste heat integration and dynamic power regulation are proposed to improve the overall energy efficiency. The research results provide a basis for energy efficiency optimization in the industrial design of high-value utilization of waste rubber.

Microwave pyrolysis; Waste rubber; Carbon black; Co-production of fuel gas; Energy efficiency evaluation