The production of debrominated aromatics via the catalytic pyrolysis of flexible printed circuit boards
- Authors
- Pyo, Sumin; Kumar, Avnish; Ali Khan, Moonis; Jeon, Byong-Hun; Choi, Siyoung Q.; Kim, Young-Min; Park, Young-Kwon
- Issue Date
- Sep-2023
- Publisher
- ELSEVIER SCIENCE SA
- Keywords
- Flexible printed circuit board; Zeolites; Basic metal oxides; Aromatics; Debromination
- Citation
- CHEMICAL ENGINEERING JOURNAL, v.472, pp.1 - 14
- Indexed
- SCIE
SCOPUS
- Journal Title
- CHEMICAL ENGINEERING JOURNAL
- Volume
- 472
- Start Page
- 1
- End Page
- 14
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/190554
- DOI
- 10.1016/j.cej.2023.144783
- ISSN
- 1385-8947
- Abstract
- Pyrolysis is an environmental technology for the proper treatment of electronic waste (e-waste) for the production of fuel. However, the presence of brominated compounds in pyrolysis oil makes its commercialization difficult. In this study, various types of zeolites, HY (30), HZSM-5 (30), HZSM-5 (50), HZSM-5 (280), and basic metal oxides (MgO and CaO) were used for the pyrolysis of flexible printed circuit boards (FPCBs) for the first time to produce bromine-free oil. A higher production efficiency of debrominated aromatic hydrocarbons, primarily benzene, toluene, ethylbenzene, xylenes (BTEXs), and naphthalene with zeolites, was achieved over basic metal oxides. The use of HZSM-5 (HZ) (30) increased the amount of benzene (an area of 31.5 × 107) and toluene (an area of 17.6 × 107), and a high debromination efficiency was observed for basic metal oxides owing to the strong affinity of halides toward the Ca2+ and Mg2+ ions. Among the BTEXs, benzene (an area of 31.5 × 107) and toluene (an area of 17.6 × 107) were obtained as highly selective monoaromatics in the presence of the catalyst HZ (30). CaO and HZ (30) were effective for debromination and aromatic production, respectively. The in-situ CaO/ex-situ HZ (30) combination revealed ∼ 100% debromination efficiency; however, the total aromatic hydrocarbon production was higher on the in-situ HZ (30)/ex-situ CaO with ∼ 77.5% debromination efficiency. Meanwhile, the in-situ HZ (30)/ex-situ CaO configuration could achieve ∼ 100% debromination efficiency by increasing the amount of CaO to 7 times to feed.
- Files in This Item
-
Go to Link
- Appears in
Collections - 서울 공과대학 > 서울 자원환경공학과 > 1. Journal Articles
![qrcode](https://api.qrserver.com/v1/create-qr-code/?size=55x55&data=https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/190554)
Items in ScholarWorks are protected by copyright, with all rights reserved, unless otherwise indicated.