Article
Crystallography
Sepideh Hemati, Smitirupa Biswal, Farshid Pahlevani, Sanjith Udayakumar, Veena Sahajwalla
Summary: This study investigates the synthesis of silicon carbide (SiC) using automotive shredder residues (ASR) and glass wastes as raw materials. The results show that the reaction mechanism involves the rapid formation of a gaseous SiO intermediate and the reaction-rate-controlling carbon reduction of SiO to SiC. By optimizing the reaction conditions, about 50% of chemical energy can be saved compared to traditional SiC production, offering economic and environmental benefits by converting ASR and glass waste into SiC.
Article
Polymer Science
Esther Acha, Alexander Lopez-Urionabarrenechea, Clara Delgado, Lander Martinez-Canibano, Borja Baltasar Perez-Martinez, Adriana Serras-Malillos, Blanca Maria Caballero, Lucia Unamunzaga, Elena Dosal, Noelia Montes, Jon Barrenetxea-Arando
Summary: This study investigated the properties and combustion characteristics of solid recovered fuel (SRF) used for scrap preheating in an aluminum refinery. Results showed that increasing the residence time of the gas at a high temperature improved the combustion of the SRF.
Article
Green & Sustainable Science & Technology
Rumana Hossain, Abdullah Al Mahmood, Veena Sahajwalla
Summary: This study efficiently recovers carbon materials from automotive shredder residue through thermal transformation, producing activated carbon with high specific surface area. The activated carbon demonstrates excellent electrochemical performance in EDLC electrodes, showcasing the potential for sustainable utilization of renewable carbon resources.
JOURNAL OF CLEANER PRODUCTION
(2021)
Article
Polymer Science
Isha Kohli, Srikanth Chakravartula Srivatsa, Oisik Das, Sheila Devasahayam, R. K. Singh Raman, Sankar Bhattacharya
Summary: The characterisation of pyrolysis of automotive shredder residue using different analytical techniques was reported in this article to investigate the possibility of converting the residue into value-added products. The results showed that the pyrolysis process consisted of one to two stages, with the first stage involving the degradation of functional stabilisers and the second stage involving the thermal degradation of the polymer char. The evolution of gases and functional groups, as well as the kinetic parameters for the pyrolysis reactions, were also determined.
Article
Energy & Fuels
Robin Faust, Panida Aonsamang, Jelena Maric, Alyona Tormachen, Martin Seemann, Pavleta Knutsson
Summary: Thermal conversion of automotive shredder residue (ASR) using indirect fluidized bed gasification was conducted, with a focus on the interactions between the bed material and the ASR ash. Iron deposition onto olivine particles was observed, potentially increasing their oxygen-carrying ability. A significant portion of the particles in the bed originated from the ASR ash, containing Fe, Si, Zn, Ti, Cu, with some particles exhibiting a hollow morphology suggesting a melt state during formation.
Article
Energy & Fuels
Ivana Stanicic, Isabel Canete Vela, Rainer Backman, Jelena Maric, Yu Cao, Tobias Mattisson
Summary: Gasification experiments were conducted at Chalmers University of Technology with automotive shredder residue in an indirect gasifier coupled to a semicommercial CFB combustor, aiming to investigate the behavior of bed material under realistic conditions and the chemistry of metal elements in a chemical looping gasification (CLG) process. Results showed the formation of an iron rich ash layer in the bottom ash plays a crucial role in speciation of copper and zinc.
Article
Chemistry, Physical
Montajar Sarkar, Rumana Hossain, Veena Sahajwalla
Summary: Graphite performs poorly in sodium ion batteries due to its smaller interlayer spacing, but hard carbon derived from ASR shows promising electrochemical performance. The hard carbon synthesized at 1100 degrees C exhibits better performance due to improved structural and morphological properties. It provides an initial reversible capacity of 434mAh/g at a current density of 10 mA/g with a capacity retention of 53% after 100 cycles. Hard carbon can be a potential candidate for use as an anode active material in sodium ion batteries.
JOURNAL OF POWER SOURCES
(2023)
Article
Chemistry, Multidisciplinary
Sepideh Hemati, Rumana Hossain, Veena Sahajwalla
Summary: The study proposed a sustainable solution to utilize mixed plastics from automotive waste residue to produce nano silicon carbide through selective thermal transformation, laying the foundation for turning complex waste into high-value, high-performance materials.
Article
Chemistry, Applied
Kaixuan Song, Yijun Li, Min Nie, Qi Wang
Summary: With a new strategy for ASR recycling, high value-added rigid polyurethane foams (RPUFs) with excellent mechanical and thermal properties have been prepared. This not only optimizes the mechanical and thermal properties, but also achieves the recycling of ASR and expands the application scope of RPUFs.
JOURNAL OF VINYL & ADDITIVE TECHNOLOGY
(2021)
Article
Forestry
Alejandro Gonzalez, Jorge Hernandez, Amabelia del Pino, Andres Hirigoyen, Jose Ualde
Summary: The sustainable management of forest plantations relies on keeping the harvest residues on site to improve soil properties and serve as a nutrient reserve. The decomposition rates of the residues and nutrient release patterns differ among Eucalyptus dunnii, Eucalyptus grandis, and Eucalyptus globulus, influenced by their chemical composition and part size. Nutrient recycling plays a crucial role in ensuring the long-term sustainability of the production system.
Article
Materials Science, Paper & Wood
Bin Yang, Ming Chen
Summary: The proper disposal of automotive shredder residue (ASR) is crucial for China's goal of achieving a 95% recycling rate for end-of-life vehicles. Pyrolysis and gasification are the most commonly used thermochemical technologies for ASR recycling, and determining the optimal process parameters is essential for obtaining more hydrogen-rich syngas. By studying the main process parameters of the two-stage ASR pyrolysis and gasification process, the optimal parameters were determined through analyzing the effects of factors like temperature, equivalence ratio, and mass ratio of steam to ASR feedstock on product distribution and characteristics. Moreover, experimental results confirmed the accuracy and reliability of the Aspen Plus simulation model and the practical feasibility of the process parameters obtained from the analysis.
Article
Green & Sustainable Science & Technology
Himanshu Tanvar, Brajendra Mishra
Summary: The growing stockpiles of bauxite residue require a sophisticated recycling system for complete utilization and value recovery. A hydrometallurgy-based process flowsheet has been proposed for the sustainable recovery of base metals and critical elements within bauxite residue.
SUSTAINABLE MATERIALS AND TECHNOLOGIES
(2022)
Article
Engineering, Environmental
Tharaka Gunaratne, Joakim Johansson, Niclas Svensson
Summary: This study aimed to assess the environmental potential of shredder fines and propose three resource recovery strategies. The results suggest that Alternative 1 and Alternative 3 are preferable over Alternative 2 in the context of Sweden, with some environmental hot spots identified.
Article
Green & Sustainable Science & Technology
Qizheng Qin, Jiushuai Deng, Huanhuan Geng, Zhongyi Bai, Xiahui Gui, Zhitao Ma, Zhenyong Miao
Summary: In this study, an eco-friendly method was used to comprehensively utilize coal gangue by extracting valuable elements and preparing adsorption materials. The results showed that the combined roasting-DI water leaching method effectively extracted primary elements and strategic metal elements.
JOURNAL OF CLEANER PRODUCTION
(2022)
Article
Chemistry, Physical
Tengrui Wang, Zhengyou Song, Yini Zhang, Yanli Gao, Liqiang Huang, Sijie Lin, Wei Luo
Summary: This study provides a targeted recovery strategy for recycling short-circuited garnet-type solid-state batteries by investigating the reaction between garnet grains and dendritic lithium. The results show that annealing at a high temperature can rapidly recover the shorted garnets and restore their electrochemical properties, significantly extending their lifespans. Economic and environmental analysis demonstrates the advantages of this targeted recovery strategy in terms of reducing fabrication time, energy consumption, and production costs.
ENERGY STORAGE MATERIALS
(2022)
Article
Environmental Sciences
L. Luyckx, G. H. J. de Leeuw, J. Van Caneghem
WASTE AND BIOMASS VALORIZATION
(2020)
Article
Environmental Sciences
Lorien Luyckx, Sam Geerts, Jo Van Caneghem
SCIENCE OF THE TOTAL ENVIRONMENT
(2020)
Article
Engineering, Environmental
Ellen Bracquene, Wim Dewulf, Joost R. Duflou
RESOURCES CONSERVATION AND RECYCLING
(2020)
Review
Engineering, Environmental
Dominik Blasenbauer, Florian Huber, Jakob Lederer, Margarida J. Quina, Denise Blanc-Biscarat, Anna Bogush, Elza Bontempi, Julien Blondeau, Josep Maria Chimenos, Helena Dahlbo, Johan Fagerqvist, Jessica Giro-Paloma, Ole Hjelmar, Jiri Hyks, Jackie Keaney, Maria Lupsea-Toader, Catherine Joyce O'Caollai, Kaja Orupold, Tadeusz Pajak, Franz-Georg Simon, Lenka Svecova, Michal Syc, Roy Ulvang, Kati Vaajasaari, Jo Van Caneghem, Andre van Zomeren, Saulius Vasarevicius, Krisztina Wegner, Johann Fellner
Article
Agricultural Engineering
Ivan Kozyatnyk, Dalia M. M. Yacout, Jo Van Caneghem, Stina Jansson
BIORESOURCE TECHNOLOGY
(2020)
Article
Engineering, Industrial
Gabriel M. Probst, Qinhan Hou, Bart Boeckmans, YongShun Xiao, Wim Dewulf
CIRP ANNALS-MANUFACTURING TECHNOLOGY
(2020)
Review
Engineering, Environmental
Gwendolyn Bailey, P. James Joyce, Dieuwertje Schrijvers, Rita Schulze, Anne Marie Sylvestre, Benjamin Sprecher, Ehsan Vahidi, Wim Dewulf, Karel Van Acker
RESOURCES CONSERVATION AND RECYCLING
(2020)
Article
Engineering, Environmental
Florian Wagner, Jef R. Peeters, Hans Ramon, Jozefien De Keyzer, Joost R. Duflou, Wim Dewulf
RESOURCES CONSERVATION AND RECYCLING
(2020)
Article
Engineering, Environmental
Wouter Sterkens, Dillam Diaz-Romero, Toon Goedeme, Wim Dewulf, Jef R. Peeters
Summary: This research explores the feasibility of using deep learning object detection on X-ray images of WEEE to predict the presence, location, and type of batteries inside electronic devices, facilitating the development of innovative techniques for battery extraction and sorting. Analysis of X-ray images from 532 electronic devices demonstrates the potential for automated battery extraction and classification using X-ray images.
RESOURCES CONSERVATION AND RECYCLING
(2021)
Article
Chemistry, Physical
Mirko Sinico, Suraj Dinkar Jadhav, Ann Witvrouw, Kim Vanmeensel, Wim Dewulf
Summary: This study compares dense specimens produced from virgin and surface-modified CuCr1 powder, as well as characterizes a third sample with abnormal porosity content. High-resolution micro-CT scans reveal that the virgin CuCr1 sample has keyhole pores and pit cavities, while the surface-modified sample mainly contains small and spherical equi-distributed metallurgical defects. The presence of W contamination in the third specimen leads to lack-of-fusion pores in subsequent LPBF layers. The different porosity types are connected to the LPBF melting mode, material properties, and potential contaminants.
Article
Engineering, Multidisciplinary
Massimiliano Ferrucci, Evelina Ametova, Wim Dewulf
Summary: A Monte Carlo reconstruction technique is proposed in this study to propagate uncertainty in x-ray CT, simplifying the computational process and facilitating subsequent dimensional measurements by utilizing a model-based approach to assess uncertainties in reconstructed gray values.
MEASUREMENT SCIENCE AND TECHNOLOGY
(2021)
Article
Energy & Fuels
Johan De Greef, Quynh N. N. Hoang, Raf Vandevelde, Wouter Meynendonckx, Zouhir Bouchaar, Giuseppe Granata, Mathias Verbeke, Mariya Ishteva, Tine Seljak, Jo Van Caneghem, Maarten Vanierschot
Summary: Waste-to-energy processes are essential for the safe removal of materials unsuitable for reuse or recycling in a circular economy. This paper discusses the behavior of inorganic compounds in these processes and highlights the need for improved combustion control systems. It proposes the development of predictive numerical models to better understand and control the behavior of inorganic compounds in waste furnaces.
Article
Chemistry, Analytical
Michiel Vlaeyen, Han Haitjema, Wim Dewulf
Summary: The research focuses on the estimation of measurement uncertainty in digital twins of measurement systems and optical systems. By mathematically describing the components of the coordinate measuring machine and laser line scanner, virtual measurements are used to determine uncertainty based on the Monte Carlo principle, and the digital twin is validated for accuracy.
Article
Multidisciplinary Sciences
Stijn Schoeters, Wim Dewulf, Jean-Pierre Kruth, Han Haitjema, Bart Boeckmans
Article
Engineering, Multidisciplinary
Arne Eggers, Jef R. Peeters, Luc Waignein, Brian Noppe, Wim Dewulf, Maarten Vanierschot
ENGINEERING APPLICATIONS OF COMPUTATIONAL FLUID MECHANICS
(2019)
Article
Engineering, Environmental
Yui Kawasaki, Sayaka Nagao-Sato, Misa Shimpo, Kahori Fujisaki, Emi Yoshii, Rie Akamatsu, Petra Warschburger
Summary: This study qualitatively describes sustainable dietary behaviors (SDBs) that Japanese and German adults can implement in their lives, and quantitatively compares the similarities and differences in understanding SDBs between the two samples. The study found that Japanese participants were more focused on food waste prevention, while German participants were more focused on solving environmental problems.
RESOURCES CONSERVATION AND RECYCLING
(2024)
Article
Engineering, Environmental
Kechun Chen, Yuan Ding, Liming Yang, Zhihao Wang, Haoxuan Yu, Difan Fang, Yufa Feng, Liying Hu, Chenxi Xu, Penghui Shao, Xubiao Luo, Liang Chen
Summary: This study proposes a targeted repair scheme for the recovery of graphite anodes from spent LIBs by systematically characterizing and analyzing the structure and composition of spent graphite (SG). The results show that the repair scheme achieves effective SG repair and the repaired graphite anode displays excellent lithium storage performance.
RESOURCES CONSERVATION AND RECYCLING
(2024)
Article
Engineering, Environmental
Takao Ueda, Shigeki Koyanaka, Tatsuya Oki
Summary: Fires caused by accidental crushing of batteries are a serious issue in the e-waste recycling process. A new in-line sorting system that uses X-ray scanning and deep learning has been developed to accurately detect batteries. Through a validation study, the system achieved higher accuracy compared to other existing programs.
RESOURCES CONSERVATION AND RECYCLING
(2024)
Article
Engineering, Environmental
Hannes Geist, Frank Balle
Summary: Research on circular economy often lacks empirical data, especially in the theory of circular process design and design for remanufacturing. This study systematically collected and analyzed engineering data on seven remanufacturing processes in the European automotive remanufacturing industry for the first time, providing empirical support for circular engineering challenges, potentials, and solutions.
RESOURCES CONSERVATION AND RECYCLING
(2024)
Article
Engineering, Environmental
Xiaojing Li, Fan Lue, Nanlin Liao, Hua Zhang, Na Yang, Pinjing He
Summary: This study assesses and predicts the greenhouse gas emissions on the timeline as waste treatment technologies develop in Shanghai from 1991 to 2025 using the Life Cycle Assessment (LCA) methodology. The findings demonstrate that GHG emission has reached net-zero in 2019 owing to the application of alternative technologies and waste segregation.
RESOURCES CONSERVATION AND RECYCLING
(2024)
Article
Engineering, Environmental
Bingchun Liu, Haoyang Wang, Xiaoqin Liang, Yibo Wang, Zijie Feng
Summary: The expansion of the photovoltaic market has resulted in a significant increase in PV waste. Therefore, conducting scientific research to determine the importance of the circular economy for sustainable growth in the PV industry is essential. The study demonstrates that accurate prediction of PV installed capacity and quantifying the importance of recycling in balancing the supply and demand of raw materials can be achieved through a multi-factor installed capacity prediction model and recovery potential prediction.
RESOURCES CONSERVATION AND RECYCLING
(2024)
Review
Engineering, Environmental
Chuanzhen Zhang, Baojing Gu, Xia Liang, Shu Kee Lam, Yi Zhou, Deli Chen
Summary: Reactive nitrogen is crucial for agriculture and human nutrition, but mismanagement can have detrimental effects on human health and ecosystem services, hindering the achievement of the 2030 Sustainable Development Goals. Progress towards nitrogen-related targets varies across countries, highlighting the need for integrated management to achieve overall synergies.
RESOURCES CONSERVATION AND RECYCLING
(2024)
Article
Engineering, Environmental
Alessandro Gatto, Marijke Kuiper, Corina van Middelaar, Hans van Meijl
Summary: This study examines the economic and environmental effects of transitioning towards more circular food systems in the European Union (EU27) by feeding animals with low-opportunity-cost feed and better utilizing local feed resources. The results show that providing subsidies for circularity and promoting the use of low-cost feed can increase animal production, but also have negative impacts on land use and emissions. On the other hand, promoting domestic feed sourcing through import tariffs can decrease animal production and greenhouse gas emissions in agriculture. However, complementary policies are needed to mitigate drawbacks and enhance benefits of a more circular agri-food system.
RESOURCES CONSERVATION AND RECYCLING
(2024)
Article
Engineering, Environmental
Jinbo Zhang, Liu Chen, Yulei Xie, Pingjian Yang, Zheng Li, Huaicheng Guo, Yang Zhang, Lirong Liu
Summary: This study examines the impact of carbon taxes on low-carbon development and climate change mitigation. By constructing a cross-system bi-layer model, the study finds that reasonable carbon taxes can promote the stability of the energy network, reduce carbon emissions and air pollutants, and optimize production efficiency and the structure of the energy system. This study contributes to a better understanding of the effects and implementation pathways of carbon taxes.
RESOURCES CONSERVATION AND RECYCLING
(2024)
Article
Engineering, Environmental
Konstantin Born, Mehmet Metehan Ciftci
Summary: Increasing recycling of metals is important for reducing reliance on mining, but it cannot fully meet future metal demand. Primary production of metals is expected to continue rising, highlighting the need for alternative circular economy strategies such as demand reduction and mitigating harmful impacts of primary metal production.
RESOURCES CONSERVATION AND RECYCLING
(2024)
Article
Engineering, Environmental
Yinqiu Ma, Lin Huang, Jiahui Li, Wei Cao, Yumei Cai
Summary: Afforestation and reforestation, such as China's Grain for Green Program, have shown to effectively mitigate greenhouse gas emissions and contribute to carbon sink capacity. This study highlights the significant carbon potential of the program and its potential application in other countries to reduce CO2 in the atmosphere.
RESOURCES CONSERVATION AND RECYCLING
(2024)
Article
Engineering, Environmental
Arlind Dervishaj, Kjartan Gudmundsson
Summary: This paper reviews digital tools for supporting the Circular Economy (CE) in the built environment and provides suggestions. The study identifies limitations in the functionalities of current tools, including a lack of representative data for LCA and underdeveloped circularity indicators. Further development is needed in terms of interoperability aspects, integration of more sources of data for LCA and circularity, and possibilities for a comprehensive evaluation of design choices.
RESOURCES CONSERVATION AND RECYCLING
(2024)
Article
Engineering, Environmental
Mohamadreza Y. Azarfam, Anuj Maheshwari, Frank D. Blum, Siddhesh Chaudhari, Clinton Switzer, Ranji Vaidyanathan, Jay C. Hanan, Sudheer Bandla
Summary: This study introduces a feasible method for manufacturing recycled composites using post-consumer carpets and recycled resin. The resulting composites have impressive strength and modulus, surpassing commercial thermoplastics and making them suitable for structural applications. This research presents a promising approach to address carpet landfilling and reduce reliance on additives.
RESOURCES CONSERVATION AND RECYCLING
(2024)
Article
Engineering, Environmental
Pujiang Shi, Tianle Huang, Hong Kit Lim, Chiew Kei Tan, Jong-Min Lee, Chor Yong Tay
Summary: This study developed a highly porous bioadaptive 3D sponge-like construct from plastic materials in discarded keyboards for advanced in vitro applications. The findings demonstrate the potential of using discarded keyboards as a waste-to-resource feedstock to achieve waste reduction and maximize value-capture.
RESOURCES CONSERVATION AND RECYCLING
(2024)
Article
Engineering, Environmental
Kuo-Jui Wu, Hailing Qiu, Caiyan Huang, Anthony S. F. Chiu, Ming-Lang Tseng
Summary: Government resource allocation practices for achieving carbon neutrality should be guided by dynamic system theory to identify potential dynamics. Carbon intensity control dynamics have a significant influence on other dynamics.
RESOURCES CONSERVATION AND RECYCLING
(2024)
