Environmental impact of semi-steel radial tires based on life cycle assessment theory
The tire industry,a cornerstone of traditional manufacturing,has reaped substantial economic benefits.However,it has simultaneously posed significant environmental challenges.This study sought to scrutinize the potential environmental factors within the tire industry,with a focus on identifying opportunities for energy reduction and tire waste mitigation.Employing the holistic life cycle theory,the research centered on semi-steel radial tires,encompassing the entire life cycle encompassing production,transportation,usage,and waste tire disposal.In this context,the study established comprehensive models for carbon emissions and energy consumption.The paper constructed carbon emission reduction lists and energy emission reduction lists specifically targeting the recycling stage.A comparative analysis was conducted on the carbon emission reduction,carbon emission reduction rates,net carbon surplus indices,energy reduction amounts,energy reduction rates,and net energy surplus indices for continuous low-temperature pyrolysis,intermittent low-temperature pyrolysis,and catalytic cracking of waste tires.The findings revealed that,over the entire life cycle,a ton of tire consumed 3.52×105 MJ of primary energy and emitted 1.01×104 kg of carbon dioxide.Transportation and usage stages emerged as the most substantial contributors to carbon emission and energy consumption during the tire life cycle.Environmental impact analyzed at each stage highlight carbon black,electricity,synthetic rubber,and steel cord as key carbon emission elements during tire production,while synthetic rubber,carbon black,and steam represent the primary energy consumption elements.Among the three methods of resource utilization considered,continuous low-temperature pyrolysis exhibits the most effective carbon recovery,while catalytic pyrolysis demonstrates superior energy recovery capabilities.Importantly,recycling emerges as the pivotal driver for carbon and energy reduction in the context of waste tire management.
万方数据
维普
