The Experts below are selected from a list of 276 Experts worldwide ranked by ideXlab platform

Paul T. Williams - One of the best experts on this subject based on the ideXlab platform.

  • valorization of Printed Circuit Boards from waste electrical and electronic equipment by pyrolysis
    Waste and Biomass Valorization, 2010
    Co-Authors: Paul T. Williams
    Abstract:

    Waste electrical and electronic equipment waste generated in the European Union (EU27) has been identified as one of the fastest growing waste streams in the EU, such that by 2020 annual arisings of waste electrical and electronic equipment will be 12.3 million tonnes. The EU have introduced the Waste Electrical and Electronic Equipment (WEEE) Directive which aims to promote the re-use, recycling and other forms of recovery of electrical and electronic waste. Printed Circuit Boards represent a particular category of WEEE that has attracted wide attention for treatment by pyrolysis technology. Printed Circuit Boards are composed of mainly a glass fibre reinforced polymer resin board onto which are manufactured components containing a wide variety of metals such as copper, iron, tin and lead. But also a range of very high value metals including gold, silver, and palladium. In this paper, the use of pyrolysis to treat waste Printed Circuit Boards as a means to recover valuable materials, including the metals, an oil and gas product from the polymeric resin and glass fibre is reviewed.

  • SEPARATION AND RECOVERY OF MATERIALS FROM SCRAP Printed Circuit Boards
    Resources Conservation and Recycling, 2007
    Co-Authors: William J. Hall, Paul T. Williams
    Abstract:

    Abstract Printed Circuit Boards from waste computers, televisions, and mobile phones were pyrolysed in a fixed bed reactor with the aim of separating and recovering the organic and metallic materials. A selection of Printed Circuit Boards from each of the three waste classes was pyrolysed at 800 °C and the pyrolysis products were analysed using GC-FID, GC-TCD, GC-MS, GC-ECD, ICP-MS, and SEM-EDX. The pyrolysis oils contained high concentrations of phenol, 4-(1-methylethyl)phenol, and p -hydroxyphenol, as well as bisphenol A, tetrabromobisphenol A, methyl phenols, and bromophenols. The pyrolysis oils also contained significant concentrations of organo-phosphate compounds and a number of tetrabromobisphenol A pyrolysis products were also identified. The pyrolysis residues were very friable and the organic, glass fibre, and metallic fractions could easily be separated and the electrical components could easily be removed from the remains of the Printed Circuit Boards. The ash in the residue mainly consisted of copper, calcium, iron, nickel, zinc, and aluminium, as well as lower concentrations of valuable metals such as gallium, bismuth, silver, and gold, silver was present in particularly high concentrations. Many other metals were also identified in the ash by ICP-MS and SEM EDX. The pyrolysis gases mainly consisted of CO 2 and CO but all of the C 1 –C 4 alkanes and alkenes were present, as were some inorganic halogens.

Sergio Terzi - One of the best experts on this subject based on the ideXlab platform.

  • Comparison of current practices for a combined management of Printed Circuit Boards from different waste streams
    Journal of Cleaner Production, 2016
    Co-Authors: Paolo Rosa, Sergio Terzi
    Abstract:

    Waste electrical and electronic equipment and end of life vehicles are two of the main sources of solid waste (after municipal solid waste), in terms of both volume and growth rate. Although they have begun to be adequately regulated worldwide, the management of Printed Circuit Boards embedded into them still presents many challenges. One of these challenges is related to the management of automotive electronic waste. The development of the automotive industry enabled the wide application of electronics within cars. This way, the similarity with electrical and electronic equipments have increased during the last decades, especially considering the presence of Printed Circuit Boards. In spite of these increasing similarities, the treatment of waste Printed Circuit Boards from both electrical and electronic equipments and end-of-life vehicles still follows quite different paths. The aim of this paper is to highlight the unsustainability of their different treatment. A comparison of current practices and a quantification of potential improvements arising from a combined management of Printed Circuit Boards are described within the paper, in terms of both volume and profit. The results demonstrate, even if only theoretically, how a change in managing waste Printed Circuit Boards could offer interesting business opportunities.

Li Hongjun - One of the best experts on this subject based on the ideXlab platform.

Zhou Le - One of the best experts on this subject based on the ideXlab platform.

  • The Status of Recycling Waste Printed Circuit Boards
    Guangzhou Chemical Industry, 2013
    Co-Authors: Zhou Le
    Abstract:

    The status of recycling waste Printed Circuit Boards was reviewed.According to the composition of waste Printed Circuit Boards and the separation and purification mechanism of valuable components in the waste Printed Circuit Boards,the recycling technologies were discussed,such as disassembly,hydrometallurgy,heat treatment,physical treatment,biological methods and super-critical methods.The environmental and safety issues during the development of existing technologies were initially discussed,which could provide references for industrial development of recycling waste Printed Circuit Boards.

Paolo Rosa - One of the best experts on this subject based on the ideXlab platform.

  • Comparison of current practices for a combined management of Printed Circuit Boards from different waste streams
    Journal of Cleaner Production, 2016
    Co-Authors: Paolo Rosa, Sergio Terzi
    Abstract:

    Waste electrical and electronic equipment and end of life vehicles are two of the main sources of solid waste (after municipal solid waste), in terms of both volume and growth rate. Although they have begun to be adequately regulated worldwide, the management of Printed Circuit Boards embedded into them still presents many challenges. One of these challenges is related to the management of automotive electronic waste. The development of the automotive industry enabled the wide application of electronics within cars. This way, the similarity with electrical and electronic equipments have increased during the last decades, especially considering the presence of Printed Circuit Boards. In spite of these increasing similarities, the treatment of waste Printed Circuit Boards from both electrical and electronic equipments and end-of-life vehicles still follows quite different paths. The aim of this paper is to highlight the unsustainability of their different treatment. A comparison of current practices and a quantification of potential improvements arising from a combined management of Printed Circuit Boards are described within the paper, in terms of both volume and profit. The results demonstrate, even if only theoretically, how a change in managing waste Printed Circuit Boards could offer interesting business opportunities.