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| Effect of Nitrogen Flow Rate on Pyrolysis of Waste TV Circuit Board |
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Received:April 13, 2021
Revised:May 13, 2021
Accepted:May 13, 2021
Published Online:August 27, 2021
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| DOI：doi：10.3969/j.issn.1007-7545.2021.09.018 |
| KeyWord:waste printed TV circuit boards; pyrolysis; product yield; product composition; nitrogen flow rate |
| Author | Institution |
| ZENG Kang-qing |
昆明理工大学冶金与能源工程学院 |
| LIU Cheng-fei |
楚雄滇中有色金属有限责任公司 |
| LIU Da-fang |
楚雄滇中有色金属有限责任公司 |
| ZHANG Wei |
昆明理工大学冶金与能源工程学院 |
| XIN Chun-fu |
昆明理工大学冶金与能源工程学院 |
| XIA Hong-ying |
昆明理工大学冶金与能源工程学院 |
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| Abstract: |
| Conventional pyrolysis of waste printed TV circuit boards was studied. Effect of nitrogen flow rate on yield and composition of pyrolysis products were explored, and pyrolysis products were analyzed and characterized by SEM, XRD, GC, GC/MS and other tests means. The results show that liquid yield decreases with increase of nitrogen flow rate and reaching the minimum value of 10.85% at 0.3 L/min; gas yield rises with increase of nitrogen flow rate and reaching the maximum value of 14.4% at 0.3 L/min. Metals such as Cu, Sn and Ag are enriched in solid product, which fluctuate with increase of nitrogen flow rate, and can be used as raw material for copper smelting. H2 is main component in gas product, and the maximum content is 68.21% when nitrogen flow rate is 0.3 L/min; the total content of H2, CO, CH4 is 80.12%—82.39%, which is a good hydrogen-rich gas. Main liquid products are phenol, 4-isopropylphenol, etc., which can be used as chemical raw materials. The gas, liquid and solid products obtained from pyrolysis of waste printed TV circuit boards can be comprehensively and efficiently utilized. |
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