Sustainable valorization of waste keyboard keys via microwave assisted pyrolysis over Fe-Ni doped green catalyst towards clean fuel production

D Muniyappan, M Ramanathan… - Energy Sources, Part …, 2023 - Taylor & Francis
Energy Sources, Part A: Recovery, Utilization, and Environmental Effects, 2023Taylor & Francis
The technological evolution of electronic equipment in the field of computers and household
appliances, along with shorter life of most items, is creating a great concern for managing
this waste stream. The main aim of the present investigation was to convert waste keyboard
keys into high-quality pyrolysis oil using a microwave catalytic pyrolysis process. Iron (Fe),
Nickel (Ni), were doped in different ratios on Biochar (BC) by wet impregnation method, and
it was used as a green catalyst for clean fuel production. Initially, a non-catalytic pyrolysis …
Abstract
The technological evolution of electronic equipment in the field of computers and household appliances, along with shorter life of most items, is creating a great concern for managing this waste stream. The main aim of the present investigation was to convert waste keyboard keys into high-quality pyrolysis oil using a microwave catalytic pyrolysis process. Iron (Fe), Nickel (Ni), were doped in different ratios on Biochar (BC) by wet impregnation method, and it was used as a green catalyst for clean fuel production.  Initially, a non-catalytic pyrolysis process was conducted and found a maximum pyrolysis oil yield of 49.6 wt.%. Further, microwave catalytic pyrolysis was conducted with variable amount of metal loading and found that highest oil yield of 61.33 wt.% was achieved using 15%Fe-5%Ni/BC catalyst due to the presence of a higher quantity of iron. The produced pyrolysis oil at this condition consists of 45.07% single-ring compounds and reduced the undesirable polycyclic aromatic hydrocarbons (PAHs) in the pyrolysis oil. This work provides a pathway for preparing green catalysts and safe disposal of electrical and electronic plastic waste with better resource recovery.
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