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论文类型：期刊论文

发表时间：2009-08-01

发表刊物：WASTE MANAGEMENT

收录刊物：EI、SCIE、PubMed、Scopus

卷号：29

期号：8

页面范围：2353-2360

ISSN号：0956-053X

摘要：Pyrolysis of large printed circuit board (PCB) waste particle was conducted on a specially designed laboratory-scale thermobalance (Macro-TC) with sample loading of 30 g under dynamic nitrogen atmosphere. The effects of heating rate (10, 15, 20 and 25 degrees C min(-1)) and particle size (1 mm x 1 mm, 5 mm x 5 mm, 10 mm x 10 mm and 10 mm x 20 mm) were examined. To compare the different decomposition behavior of fine and large one, the thermal decomposition of PCB waste powder (approximately 5 mg) was also performed on a thermogravimetric analyzer (common TG) under various heating rates (10, 15, 20 and 40 degrees C min(-1)) and particle size ranges (0.198-0.165mm, 0.165-0.074mm, 0.074-0.055 mm and 0.055-0.047 mm). Experimental results show that large particle has a pyrolysis reaction retardancy compared to fine one. The distributed activation energy model was used to study the pyrolysis kinetics. It was found that during pyrolysis process, values of frequency factor (k(0)) changed with different activation energy (E) values. On common TG, the E values range from 156.95 to 319.37 kJ mol(-1) and k(0) values range from 2.67 x 10(13) to 2.24 x 10(27) s(-1). While, on Macro-TG, the range of E was 31.48-41.26 kJ mol(-1) and of the frequency factor was 19.80-202.67 s(-1). (C) 2009 Elsevier Ltd. All rights reserved.