Article
Engineering, Environmental
Yang Ren, Chengyang Cao, Yetao Cheng, Hongyun Hu, Hui Liu, Xian Li, Huimin Liu, Hong Yao
Summary: This study investigated the pyrolysis behavior of automobile shredder residue (ASR) under a wide range of heating rates using high-temperature flue gas as the heat source in power plants. Results showed that high heating rates improved the homogenization of pyrolytic products and the generation of aromatics in oil, as well as the cleavage of single bonds and carbon-oxygen bonds. Enhanced cracking of volatiles significantly reduced the wax-like fraction, while deoxygenation in oil and the high heating value of gases were improved. These findings demonstrate the feasibility and economic efficiency of co-processing ASR in coal-fired power plants via pyrolysis and provide guidance for future commercial application.
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
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, Physical
Soo-Jin Cho, Ha-Na Jang, Sung-Jin Cho, Young-Sam Yoon, Heung-Min Yoo
Summary: The quantity of waste from end-of-life vehicles is increasing, leading to the need for improving the recycling of automobile shredder residues (ASR). In this study, four types of products were manufactured using ASR melting slag (ASRMS) and evaluated for their environmental performance, quality standards, and technology. The manufactured bricks, including interlocking, clay, lightweight swelled ceramic (LSC) bricks, and asphalt paving aggregate (APA), showed satisfactory results in terms of recyclability and quality standards. APA had the best performance among the four types of bricks.
Article
Chemistry, Applied
Qi He, Wei Deng, Kai Xu, Long Jiang, Jun Xu, Sheng Su, Xun Hu, Yi Wang, Song Hu, Jun Xiang
Summary: This study investigates the effect of torrefaction on the formation of heavy components in pyrolysis oil from automobile shredder residue (ASR). The results suggest that torrefaction enhances the interaction between volatile compounds and semi-char, leading to increased content of heavy components and decreased content of heavy components containing heteroatoms in the pyrolysis oil.
FUEL PROCESSING TECHNOLOGY
(2023)
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
Chemistry, Multidisciplinary
Hansol Lee, Hoon Lee
Summary: The newly designed air table has successfully increased the recycling rate of end-of-life vehicles (ELVs) to 95%, addressing the issues of higher operating costs and decreased throughput associated with traditional wet treatments.
SEPARATION SCIENCE AND TECHNOLOGY
(2021)
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
Energy & Fuels
Heung-Min Yoo, Sang-Yeop Lee, Sung-Jin Cho, Yong-Chil Seo, Ha-Na Jang
Summary: This study investigated the feasibility of utilizing automobile shredder residue (ASR) as an energy and recycling resource. Gasification of ASR was conducted at different temperatures and equivalence ratios. The solid residue obtained from the gasification process was used to prepare clay bricks. The study showed that the gasification of ASR at high temperatures and equivalence ratios resulted in higher yields of syngas. Moreover, the study revealed that the combined melting-gasification process was more efficient in terms of greenhouse gas reduction compared to ASR incineration.
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
Computer Science, Interdisciplinary Applications
Yuanzhang Bai, Kaixuan Song, Yucheng Hou, Ning Chen, Yijun Li
Summary: With the growth of the automobile industry, the recycling of automobile shredder residue (ASR) has become an urgent issue due to its complex composition and difficulty in traditional recycling methods. This study successfully applied solid-state shear milling technology to modify the processability of ASR, allowing for its melt processing and the preparation of a high-density polyethylene (HDPE)/ASR composite with superior mechanical properties compared to commercially available recycled PE. This research not only provides a feasible application route for ASR recycling but also demonstrates a viable method for recycling polymer waste with complicated components through physical recycling.
ENGINEERING REPORTS
(2023)
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
Green & Sustainable Science & Technology
Faris Matalkah
Summary: Medical Waste Bottom Ash (MWBA) is a toxic material that poses serious health risks to the atmosphere and humans. This study investigates methods to enhance the reactivity of MWBA for its use in concrete mixtures. Results show that ball milling (wet or dry) and calcination increase the ash reactivity and compressive strength of mortar, while a combination of wet milling followed by calcination significantly enhances compressive strength. The inclusion of 40% calcined MWBA improves acid resistance in concrete.
JOURNAL OF CLEANER PRODUCTION
(2023)
Article
Environmental Sciences
Jiaqi Chai, Yafei Shi, Yan Wang, Xiong Yang, Kewu Pi, Andrea R. Gerson
Summary: Surfactant-assisted air flotation separation was used to remove microplastics and other pollutants from municipal solid waste incineration bottom ash. The quantity of floated microplastics increased with the sodium dodecylbenzene sulfonate (SDBS) concentration and decreased with turbidity. Treatment with polyacrylamide and polyaluminium chloride reduced microplastic abundance, turbidity, and potential heavy metals in the recycled flotation solution. It is estimated that 3.4 kg of microplastics could be removed from each ton of MSWI-BA.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Chemistry, Physical
Feraidon F. Ataie
Summary: The study found that treated rice straw ash and rice husk ash in alkali activated slag systems can increase compressive strength but also lead to greater drying shrinkage. Treated ash samples have a higher silica modulus, potentially resulting in a finer pore structure. On the other hand, the use of silica fume significantly reduces drying shrinkage in AAS systems.