Performance analysis and production of aromatics for ex situ catalytic pyrolysis of engineered WEEE

RISE Research Institutes of Sweden, Bioraffinaderi och energi RISE Research Institutes of Sweden, Systemomställning och tjänsteinnovation KTH Royal Institute of Technology, Sweden KTH Royal Institute of Technology, Sweden KTH Royal Institute of Technology, Sweden Elsevier B.V. 2024

Ex situ catalytic pyrolysis of engineered waste electrical and electronic equipment (WEEE) was conducted in a two-stage reactor using HZSM-5 catalyst. The effect of the catalysis temperature and the catalyst-to-feedstock (C/F) ratio on products yield, gas and oil composition, and products characterization were investigated in this study. Results indicated that lower reforming temperature and C/F ratio favored organic fractions production. The highest yield of organic fraction was obtained at a catalysis temperature of 450 °C and at a C/F ratio of 0.15, corresponding to 28.5 and 27.4 wt %, respectively. The highest selectivity toward aromatic hydrocarbons and the lowest TAN value of the organic fraction were obtained at a catalysis temperature of 450 °C and a C/F ratio of 0.2, respectively. Most of the alkali and transition metals and 23 % of Br remained in the solid residue after the catalytic pyrolysis of low-grade electronic waste (LGEW).
The authors would like to acknowledge the Swedish Energy Agency(Energimyndigheten) (project number 51219–1) for the financial support. Furthermore, the authors acknowledge the Research Institute of Sweden (RISE) for the help and technical support as well as Boliden Rönnskär for providing the WEEE material.

Aromatic hydrocarbons; Aromatization; Catalysis; Catalytic reforming; Electronic Waste; Oscillators (electronic); Pyrolysis; Transition metals; Aromatic; Catalyst-to-feedstock ratio; Catalytic pyrolysis; Ex situ; H-ZSM-5; Organic fractions; Performances analysis; Reforming temperatures; Waste electrical and electronic equipment; ]+ catalyst; Catalysts; Organic Chemistry; Organisk kemi; Chemical Process Engineering; Kemiska processer; Article in journal; info:eu-repo/semantics/article; text

10.1016.j.jaap.2024.106510

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UPE oai:DiVA.org:ri-73282
0000-0002-8284-4172
0000-0002-9949-6274
doi:10.1016/j.jaap.2024.106510
Scopus 2-s2.0-85190944883
1457289786

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