scholarly journals A closed-loop electrogenerative recycling process for recovery of silver from a diluted cyanide solution

RSC Advances ◽  
2019 ◽  
Vol 9 (54) ◽  
pp. 31753-31757
Author(s):  
Faiz Bukhari Mohd Suah ◽  
Bee Ping Teh ◽  
Nadia Mansor ◽  
Hairul Hisham Hamzah ◽  
Norita Mohamed
Keyword(s):  
Closed Loop ◽  
Complete Recovery ◽  
Cyanide Solution ◽  
Recycling Process ◽  
Silver Cyanide

A closed-loop process for the complete recovery of silver from a diluted silver cyanide solution has been constructed based on an electrogenerative process.

CFRP Reclamation and Remanufacturing Based on a Closed-loop Recycling Process for Carbon Fibers Using Supercritical N-butanol

2020 ◽  
Vol 21 (3) ◽  
pp. 604-618
Author(s):  
Weihao Liu ◽  
Haihong Huang ◽  
Huanbo Cheng ◽  
Zhifeng Liu
Keyword(s):  
Carbon Fibers ◽  
Closed Loop ◽  
Recycling Process

scholarly journals A closed-loop recycling process for discontinuous carbon fibre polyamide 6 composites

2019 ◽  
Vol 179 ◽  
pp. 107418 ◽  
Author(s):  
Rhys J. Tapper ◽  
Marco L. Longana ◽  
Ian Hamerton ◽  
Kevin D. Potter
Keyword(s):  
Carbon Fibre ◽  
Closed Loop ◽  
Polyamide 6 ◽  
Recycling Process

scholarly journals Circularity Study on PET Bottle-To-Bottle Recycling

2021 ◽  
Vol 13 (13) ◽  
pp. 7370
Author(s):  
Elisabeth Pinter ◽  
Frank Welle ◽  
Elisa Mayrhofer ◽  
Andreas Pechhacker ◽  
Lukas Motloch ◽  
...  
Keyword(s):  
Solid State ◽  
Closed Loop ◽  
Real Life ◽  
High Standard ◽  
Industrial Processes ◽  
Recycling Process ◽  
Pet Bottles ◽  
Bottle Production ◽  
Recycled Material

With the European Green Deal, the importance of recycled products and materials has increased. Specifically, for PET bottles, a high content of recycled material (rPET) is demanded by the industry and consumers. This study was carried out in a lab environment replicating real-life industrial processes, to investigate the possible impacts on rPET quality over eleven recycling loops, aiming to use high amounts of rPET repetitively. A cycle included extrusion, solid state polycondensation (SSP), a second extrusion to simulate bottle production, hot wash and a drying step. 75% rPET and 25% virgin PET were extruded in eleven cycles to simulate a recycling and production process. Samples underwent chemical, physical and biological analysis. The quality of the rPET material was not adversely affected. Parameters such as coloring, intrinsic viscosity, concentration of critical chemicals and presence of mutagenic contaminants could be positively assessed. The quality of the produced material was likely influenced by the input material’s high standard. A closed loop PET bottle recycling process using an rPET content of up to 75% was possible when following the proposed process, indicating that this level of recycled content can be maintained indefinitely without compromising quality.

scholarly journals Grinding, Melting and Reshaping of EoL Thermoplastic Polymers Reinforced with Recycled Carbon Fibers

2021 ◽  
Vol 10 (2) ◽  
pp. 53-62
Author(s):  
A. Donatelli ◽  
G. Casciaro ◽  
T. Marcianò ◽  
F. Caretto
Keyword(s):  
Composite Materials ◽  
Carbon Fibers ◽  
Closed Loop ◽  
Lower Cost ◽  
New Products ◽  
Thermoplastic Composites ◽  
Recycling Process ◽  
Thermoplastic Polymers ◽  
Technical Feasibility ◽  
Management Hierarchy

This article assesses the technical feasibility of a recycling process based on grinding, melting and re-shaping of carbon fibers (CFs) reinforced thermoplastic polymers, in order to obtain new products that can be introduced in different markets, depending on mechanical properties retained. The idea at the basis of our study is that this kind of recycling process lies at the edge of the stages of recycling and re-use of materials, considering that the latter is preferable when considering the waste management hierarchy. Lower cost and similar mechanical strength of virgin CFs allowed the spread of recycled CFs in the automotive sector in the form of composite materials. Taking into account the Directive 2000/53/EC that sets out measures to prevent and limit waste from end-of-life (EoL) vehicles and their components, and ensures that where possible this is reused, recycled or recovered, we considered worth to investigate the recyclability of composite materials made with recycled CFs when they will reach the state of EoL materials. Considering this premise, an additional scope of this paper is therefore to provide some useful information about the possibility to perform a multiple closed loop recycling of rCF thermoplastic composites. Experiments carried out demonstrated that re-shaping of composites is technically feasible. Some square plates were produced without any setback. The mass balance of the recycling process demonstrated that about 88% of the EoL material can be recovered. Calculation of energy consumption showed that approximately 16 MJ are necessary in the treatment of 1 kg of EoL composites.

Effective Leaching Strategies for a Closed-Loop Spent Lithium-Ion Battery Recycling Process

2022 ◽  
Vol 26 (2) ◽  
Author(s):  
M. Venkata Ratnam ◽  
K. Senthil Kumar ◽  
S. Samraj ◽  
Mohammedsani Abdulkadir ◽  
K. Nagamalleswara Rao
Keyword(s):  
Lithium Ion Battery ◽  
Closed Loop ◽  
Lithium Ion ◽  
Recycling Process ◽  
Battery Recycling

scholarly journals Development of a closed-loop recycling process for discontinuous carbon fibre polypropylene composites

2018 ◽  
Vol 146 ◽  
pp. 222-231 ◽  
Author(s):  
Rhys J. Tapper ◽  
Marco L. Longana ◽  
Hana Yu ◽  
Ian Hamerton ◽  
Kevin D. Potter
Keyword(s):  
Carbon Fibre ◽  
Closed Loop ◽  
Recycling Process ◽  
Polypropylene Composites

A novel closed-loop process for the simultaneous recovery of valuable metals and iron from a mixed type of spent lithium-ion batteries

2019 ◽  
Vol 21 (23) ◽  
pp. 6342-6352 ◽  
Author(s):  
Xiangping Chen ◽  
Jiazhu Li ◽  
Duozhi Kang ◽  
Tao Zhou ◽  
Hongrui Ma
Keyword(s):  
Lithium Ion Batteries ◽  
Cathode Materials ◽  
Mixed Type ◽  
Closed Loop ◽  
Lithium Ion ◽  
Recycling Process ◽  
Valuable Metals ◽  
Spent Libs

Valuable metals and Fe can be simultaneously recovered from spent LIBs to regenerate cathode materials by closed-loop recycling process.

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