Control of Gas Emission During Pyrolysis of Waste Printed Wiring Boards

Abstract

The pyrolysis of PWBs was investigated by a TG-DTA-MS furnace at 300-1173 K. the kinetics and the control of emitted gas during the pyrolysis of PWBs with and without chemical additives were studied. Moreover, the possibility of controlling the amount of toxic exhaust gases like HBr, C 6H 6, Br 2, Cl 2, HCl gas and recovering beneficial gaseous fuels like CH 4 and H 2 from pyrolysis process is discussed. the MS data for each PWB sample were examined as a function of temperature and particular m/z values could be associated with the mass loss steps in the TG data. the degradation of the organic material was characterized by m/z = 2, 16, 18, 28, 36, 44, 71, 78, 81, and 160. Fe 2O 3 was the best inhibitor of toxic HBr and CeHe when compared to Al 2O 3, CaO Y-zeolite and ZSM-5. Moreover, it had no significant effect on the valuable H 2 and CH 4 gas evolution. This selective inhibition of toxic gases while maintaining the valuable ones make Fe 2O 3 the best candidate among the investigated additives in controlling gas emissions from PWB pyrolysis process.

Meeting Name

TMS Annual Meeting (2012, Orlando, FL)

Department(s)

Materials Science and Engineering

Second Department

Chemistry

Document Type

Article - Conference proceedings

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2012 Wiley, All rights reserved.

Publication Date

01 Jan 2012

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