Recycling postconsumer beverage cartons reduces carbon emissions by minimizing both direct emissions from disposal via incineration or landfills,and by reducing the demand for producing virgin materials.However,the co...Recycling postconsumer beverage cartons reduces carbon emissions by minimizing both direct emissions from disposal via incineration or landfills,and by reducing the demand for producing virgin materials.However,the contribution that recycling beverage carton could make to China’s carbon reduction ambitions remains unknown.This study establishes a framework for evaluating the carbon emissions reduction potential of recycling postconsumer beverage cartons from a life-cycle perspective and calculates the potential carbon reductions for 31 Chinese provinces,including trajectories for 2030.We identify key factors that could greatly influence the total emissions reduction potential across all provinces,including the proportion of paperboard used and the emission factor of primary aluminum production.We show the incineration rate and electricity emission factor explain variations among provinces when recycling volumes are held constant.Integrated direct extrusion recycling technology has a greater dependence on electricity than the separating method and is therefore more significantly affected by the electricity emission factor.In 2030,recycling under one of five shared Socioeconomic Pathway scenarios considered shows the highest potential for carbon emissions reduction(median=21304 tons of CO_(2) equivalents).This study provides valuable insights for policymakers seeking to quantify subsidy levels and design long-term plans for beverage carton recycling to promote a circular economy.展开更多
In this paper,according to the cantilever beam of fetching carton mechanism in square packaging machine, considering the impact of motion of air cylinder on it,its dynamics model and finite element model are built by ...In this paper,according to the cantilever beam of fetching carton mechanism in square packaging machine, considering the impact of motion of air cylinder on it,its dynamics model and finite element model are built by using ANSYS. This paper not only acquires the deformation distribution,stress distribution and natural frequency of the cantilever beam in the static state; but also gets the dynamic response curve in the maximum deformation and the dynamic stress response curve in the near of the maximum stress during the motion of air cylinder. Result shows that no matter static state or dynamic state,deformation of the cantilever in the fetching carton mechanism is acceptable. The design of mechanism is reliable and its motion is also stable; no resonance can occur on the cantilever beam.展开更多
基金funded by the National Natural Science Foundation of China[Grant Nos.52100210 and 72061147003].
文摘Recycling postconsumer beverage cartons reduces carbon emissions by minimizing both direct emissions from disposal via incineration or landfills,and by reducing the demand for producing virgin materials.However,the contribution that recycling beverage carton could make to China’s carbon reduction ambitions remains unknown.This study establishes a framework for evaluating the carbon emissions reduction potential of recycling postconsumer beverage cartons from a life-cycle perspective and calculates the potential carbon reductions for 31 Chinese provinces,including trajectories for 2030.We identify key factors that could greatly influence the total emissions reduction potential across all provinces,including the proportion of paperboard used and the emission factor of primary aluminum production.We show the incineration rate and electricity emission factor explain variations among provinces when recycling volumes are held constant.Integrated direct extrusion recycling technology has a greater dependence on electricity than the separating method and is therefore more significantly affected by the electricity emission factor.In 2030,recycling under one of five shared Socioeconomic Pathway scenarios considered shows the highest potential for carbon emissions reduction(median=21304 tons of CO_(2) equivalents).This study provides valuable insights for policymakers seeking to quantify subsidy levels and design long-term plans for beverage carton recycling to promote a circular economy.
基金Program for Changjiang Scholars and Innovative Research Team in University,China(No.IRT1220)Donghua University Thesis Innovation Fund,China(No.EG2014028)
文摘In this paper,according to the cantilever beam of fetching carton mechanism in square packaging machine, considering the impact of motion of air cylinder on it,its dynamics model and finite element model are built by using ANSYS. This paper not only acquires the deformation distribution,stress distribution and natural frequency of the cantilever beam in the static state; but also gets the dynamic response curve in the maximum deformation and the dynamic stress response curve in the near of the maximum stress during the motion of air cylinder. Result shows that no matter static state or dynamic state,deformation of the cantilever in the fetching carton mechanism is acceptable. The design of mechanism is reliable and its motion is also stable; no resonance can occur on the cantilever beam.
