Steam gasification of epoxy circuit board in the presence of carbonates

Shangzhong Zhang*, Kunio Yoshikawa, Hideki Nakagome, Tohru Kamo

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)

Abstract

To recover useful metals from end-of-life electronic devices and to convert plastic components from these devices into clean fuel gas, steam gasification of epoxy board samples was carried out at 600-700 °C and 0. 1 MPa pressure in the presence of a ternary eutectic carbonate (lithium carbonate, sodium carbonate, and potassium carbonate). Hydrogen and carbon dioxide were the main products, and methane and carbon monoxide were detected as minor products. The gasification proceeded in two steps: an initial rapid pyrolysis followed by secondary steam gasification of char produced from the pyrolysis. The ternary eutectic carbonate accelerated not only the latter steam gasification but also the initial rapid pyrolysis. The activation energy for the steam gasification of epoxy board samples in the presence of the carbonate was 122 kJ/mol.

Original languageEnglish
Pages (from-to)294-300
Number of pages7
JournalJournal of Material Cycles and Waste Management
Volume14
Issue number4
DOIs
Publication statusPublished - 2012 Oct
Externally publishedYes

Keywords

  • Carbonate
  • E-waste
  • Epoxy board
  • Steam gasification

ASJC Scopus subject areas

  • Waste Management and Disposal
  • Mechanics of Materials

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