Impact of recycling effect in comparative life cycle assessment for materials selection - A case study of light-weighting vehicles

Liu, Junxi; Daigo, Ichiro; Panasiuk, Daryna; Dunuwila, Pasan; Hamada, Ko; Hoshino, Takeo

doi:10.1016/j.jclepro.2022.131317

Cited by 18 publications

(9 citation statements)

References 47 publications

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“…These proposed solutions are intended to facilitate a reduction in waste generation and a concomitant limitation in the consumption of natural resources. A study (Liu et al, 2022) employed LCA to reveal that greenhouse gas emissions during the recycling of electric vehicles with batteries substantially impact their life cycle more than vehicles with internal combustion engines. Moreover, numerous studies suggest that developing advanced recycling techniques capable of maximizing material recovery across the entire life cycle could significantly reduce greenhouse gas emissions (Safarian, 2022).…”

Section: Life Cycle Assessment Results Interpretation and Conclusionmentioning

confidence: 99%

Comprehensive review of life cycle assessment methodologies for passenger vehicles

Szumska

2024

J. sustain. dev. transp. logist.

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Purpose: This paper aims to advance knowledge in the methodology of environmental life cycle assessment (LCA) for vehicles and to discern potential environmental and health burdens associated with combustion and electric vehicles. Methodology: A systematic review was conducted using the Scopus database, with a focus on papers published between 2005 and November 2023. The search was refined to include only English-language publications investigating passenger vehicles, resulting in a final corpus of 75 studies. Results: The review revealed that LCA conclusions for automotive vehicles can vary widely depending on the specific study's scope, methodology, and goals. Many studies emphasize the need for a holistic approach considering various drive technologies, production aspects, and local geographical conditions. Theoretical contribution: This paper contributes to the field of environmental science and sustainability by synthesizing the current state of knowledge on the environmental impact of vehicles across their entire life cycle. The findings highlight the importance of a nuanced and comprehensive approach to understanding and mitigating the environmental externalities of transportation. Practical implications: The insights from this review can inform policymakers, manufacturers, and consumers in their decisions regarding sustainable transportation solutions. By understanding the key areas of concern and improvement opportunities across the entire life cycle of vehicles, stakeholders can work towards a more environmentally responsible and sustainable transportation system.

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Section: Life Cycle Assessment Results Interpretation and Conclusionmentioning

confidence: 99%

Comprehensive review of life cycle assessment methodologies for passenger vehicles

Szumska

2024

J. sustain. dev. transp. logist.

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“…Materials for vehicles and the vehicles themselves undergo the LCA most frequently due to their significant contribution to global carbon dioxide emissions caused by fuel combustion. The connected GHG emissions determined by the weight of vehicles are very significant [21][22][23][24][25] , reaching one-third of the total fuel consumption at the stage of vehicle operation. Reducing the weight of cars and other moving vehicles reduces fuel consumption during their operation, an important step since transportation produces almost a quarter of today's emissions of the world's carbon dioxide.…”

Section: Life Cycle Assessment (Lca) Methodology Basis For Selecting ...mentioning

confidence: 99%

“…Typically, traditional LCA studies do not fully consider the EoL stages (recycling, reuse, and remanufacturing) as it is challenging to estimate and formalise the impact of secondary materials produced by different recycling methods on the environmental impact of products. Cut-off, partitioning, and avoided burden approaches are three possible modelling approaches for characterising the recycling effects 16,22,24 . In this study, we did not consider the recycling effect for AHSS at changing the alloying technology by aluminium because of a lack of actual data for such a grade recycling.…”

Section: Life Cycle Assessment (Lca) Methodology Basis For Selecting ...mentioning

confidence: 99%

Energy and Environmental Savings by and for Steel Lightweight

Stovpchenko,

Medovar,

Stepanenko

et al. 2024

ISIJ Int.

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The ironmaking and steelmaking industry is one of the heavy polluters responsible for nearly 7% of global carbon dioxide and greenhouse gas (GHG) emissions. Creating new technologies and equipment and renewing the assortment of metallurgy products is compulsory to achieve the goal of climate change prevention. Lightweight and advanced higher-strength steels (AHSS) to replace old mild grades and simultaneously decrease the mass of ready products is one of the efficient ways. Three generations of AHSS of different chemical compositions and properties have already been developed, including lightweight grades alloyed with a high aluminium content. A review of the Life Cycle Assessment (LCA) results proves the energy and environmental efficiency of Advanced High Strength Steels (AHSS) compared with aluminium and HSS for the same purpose structures in vehicles. Using aluminothermic ferroaluminium from secondary materials helps to reduce the cost of lightweight steels with high aluminium content due to the 2-3 times higher assimilation of aluminium by liquid steel at both deoxidation and alloying, which was experimentally proved for HSS grades. Due to less energy consumption at ferroaluminium than secondary aluminium ingots manufacturing, alloying of AHSS (10% wt of Al) by FeAl30 reduces GHG emission for more than 0.384 t CO 2 -eq per ton of steel.

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“…Meanwhile, scraped vehicles have caused serious environmental pollution and tremendous natural resource waste problems due to the low recycling efficiency when vehicles reach end-of-life in the world [4][5][6]. The biggest issue for the low recycling efficiency is the complex disassembly processes among the different components, which usually generate a permanent connection for robust joints pursing and neglect the recycling aspect [7,8]. Thus, it is imperative to consider the disassembly process between metals and CFRTP at the initial joining stage.…”

Section: Introductionmentioning

confidence: 99%

Design of rose thorn biomimetic micro-protrusion for metals and CFRTP easily disassembled joining

Wang,

Yasuda,

Nishikawa

2024

Eng. Res. Express

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This study focuses on the joining techniques for metals and carbon fiber reinforced thermoplastic (CFRTP) to address the pursuit of lightweight vehicles and high recycling efficiency. The innovative concept of “easy-disassembly joining” is introduced for the first time, aiming for robust joint strength and efficient disassembly/recycling of end-of-life vehicles. Inspired by rose thorn morphology and natural performances, bionic micro-protrusions are explored as intermediate structures to facilitate the easy disassembly joining between metals and CFRTP. The primary focus of the study revolves around the design strategy of micro-protrusions inspired by rose thorns. The objective is to identify the most effective micro-protrusion shapes by understanding the interplay of its geometrical parameters, including base shape, apex position, profile curvature, and stress distribution under diverse loads. Utilizing static stress numerical simulations, the study conclusively identifies an elliptical base shape with the apex positioned slightly above the right edge of the structure. The outer profile adopts a circular arc, and the inner profile follows a conical curve. This configuration effectively mitigates stress concentration at the bottom, which interfaces with the metal substrate and the smaller areas around the apex. This research introduces an innovative concept for metal-CFRTP joining and applies bionic principles in engineering solutions. By promoting lightweight and sustainable structures through enhanced disassembly efficiency, it contributes to groundbreaking advancements in the field.

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Impact of recycling effect in comparative life cycle assessment for materials selection - A case study of light-weighting vehicles

Cited by 18 publications

References 47 publications

Comprehensive review of life cycle assessment methodologies for passenger vehicles

Comprehensive review of life cycle assessment methodologies for passenger vehicles

Energy and Environmental Savings by and for Steel Lightweight

Design of rose thorn biomimetic micro-protrusion for metals and CFRTP easily disassembled joining

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