[article]
| Titre : |
Recycling of waste printed circuit boards by microwave - induced pyrolysis and featured mechanical processing |
| Type de document : |
texte imprimé |
| Auteurs : |
Jing Sun, Auteur ; Wenlong Wang, Auteur ; Zhen Liu, Auteur |
| Année de publication : |
2011 |
| Article en page(s) : |
pp. 11763–11769 |
| Note générale : |
Chimie industrielle |
| Langues : |
Anglais (eng) |
| Mots-clés : |
Recycling waste Pyrolysis |
| Résumé : |
The combination of microwave-induced pyrolysis and mechanical processing is a promising way to recycle the waste printed circuit boards (WPCBs). In pyrolysis, WPCBs yield an average of 78.6 wt.% solid residues, 15.7 wt.% oil, and 5.7 wt.% gas. The solid residues are rich in metals; the oil is abundant with phenol and substituted phenols which can be reclaimed as chemicals or fuels; and the gas is combustible with a caloric value of 4504 kcal/m3. Our featured mechanical processing, including crushing and specially designed sink-float separation, is very suitable for metal reclamation from the pyrolysis residues. Over 99 wt.% of metals can be dissociated by the crushing step; the final recycling rate and grade of metals in the separation step can amount to 95 wt.% and 96.5%, respectively. The economic assessment reveals that the combined treatment is amazingly profitable and very promising to tackle the challenges posed by the electronic scraps. |
| DEWEY : |
660 |
| ISSN : |
0888-5885 |
| En ligne : |
http://pubs.acs.org/doi/abs/10.1021/ie2013407 |
in Industrial & engineering chemistry research > Vol. 50 N° 20 (Octobre 2011) . - pp. 11763–11769
[article] Recycling of waste printed circuit boards by microwave - induced pyrolysis and featured mechanical processing [texte imprimé] / Jing Sun, Auteur ; Wenlong Wang, Auteur ; Zhen Liu, Auteur . - 2011 . - pp. 11763–11769. Chimie industrielle Langues : Anglais ( eng) in Industrial & engineering chemistry research > Vol. 50 N° 20 (Octobre 2011) . - pp. 11763–11769
| Mots-clés : |
Recycling waste Pyrolysis |
| Résumé : |
The combination of microwave-induced pyrolysis and mechanical processing is a promising way to recycle the waste printed circuit boards (WPCBs). In pyrolysis, WPCBs yield an average of 78.6 wt.% solid residues, 15.7 wt.% oil, and 5.7 wt.% gas. The solid residues are rich in metals; the oil is abundant with phenol and substituted phenols which can be reclaimed as chemicals or fuels; and the gas is combustible with a caloric value of 4504 kcal/m3. Our featured mechanical processing, including crushing and specially designed sink-float separation, is very suitable for metal reclamation from the pyrolysis residues. Over 99 wt.% of metals can be dissociated by the crushing step; the final recycling rate and grade of metals in the separation step can amount to 95 wt.% and 96.5%, respectively. The economic assessment reveals that the combined treatment is amazingly profitable and very promising to tackle the challenges posed by the electronic scraps. |
| DEWEY : |
660 |
| ISSN : |
0888-5885 |
| En ligne : |
http://pubs.acs.org/doi/abs/10.1021/ie2013407 |
|
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